HPE FlexFabric 5940 & 5930 Switch Series
Layer 2—LAN Switching Configuration Guide
P
art number: 5200-6370b
Software
version: Release 2702 and later
Document version: 6W101-20230412
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Contents
Configuring the MAC address table ······················································ 1
About the MAC address table ······································································································· 1
How a MAC address entry is created ······················································································· 1
Types of MAC address entries ······························································································· 1
MAC address table tasks at a glance ····························································································· 2
Configuring MAC address entries ·································································································· 3
About MAC address entry-based frame forwarding ····································································· 3
Restrictions and guidelines for MAC address entry configuration ··················································· 3
Prerequisites for MAC address entry configuration ····································································· 3
Adding or modifying a static or dynamic MAC address entry ························································· 4
Adding or modifying a blackhole MAC address entry ··································································· 4
Adding or modifying a multiport unicast MAC address entry ·························································· 4
Adding or modifying a multiport unicast MAC address entry for VXLAN ··········································· 6
Setting the aging timer for dynamic MAC address entries ··································································· 6
Disabling MAC address learning ··································································································· 7
About disabling MAC address learning ····················································································· 7
Disabling global MAC address learning ···················································································· 7
Disabling MAC address learning on an interface ········································································ 8
Disabling MAC address learning on a VLAN ·············································································· 8
Setting the MAC learning limit ······································································································· 8
Configuring the unknown frame forwarding rule after the MAC learning limit is reached ···························· 9
Assigning MAC learning priority to interfaces ··················································································· 9
Enabling MAC address synchronization ························································································ 10
Configuring MAC address move notifications and suppression ·························································· 12
Enabling ARP fast update for MAC address moves ········································································· 13
Disabling static source check ······································································································ 13
Enabling SNMP notifications for the MAC address table ··································································· 14
Display and maintenance commands for MAC address table ····························································· 15
MAC address table configuration examples ··················································································· 15
Example: Configuring the MAC address table ·········································································· 15
Configuring MAC Information ···························································· 17
About MAC Information ············································································································· 17
Enabling MAC Information ········································································································· 17
Configuring the MAC Information mode ························································································ 17
Setting the MAC change notification interval ·················································································· 18
Setting the MAC Information queue length ···················································································· 18
MAC Information configuration examples ······················································································ 19
Example: Configuring MAC Information ·················································································· 19
Bulk configuring interfaces ······························································· 21
About interface bulk configuration ································································································ 21
Restrictions and guidelines: Bulk interface configuration ··································································· 21
Procedure ······························································································································ 22
Display and maintenance commands for bulk interface configuration ·················································· 22
Configuring Ethernet interfaces ························································· 23
About Ethernet interface ············································································································ 23
Configuring a management Ethernet interface ················································································ 23
Ethernet interface naming conventions ························································································· 24
Restrictions and guidelines: Ethernet interface configuration ····························································· 24
100-GE interface configuration restrictions and guidelines ·························································· 24
40-GE interface configuration restrictions and guidelines ··························································· 24
Configuring common Ethernet interface settings ············································································· 25
Splitting a 100-GE interface and combining 10-GE breakout interfaces ········································· 25
Splitting a 40-GE interface and combining 10-GE breakout interfaces ··········································· 26
Configuring basic settings of an Ethernet interface ··································································· 27
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Configuring basic settings of an Ethernet subinterface ······························································· 28
Configuring the link mode of an Ethernet interface ···································································· 28
Configuring jumbo frame support ·························································································· 29
Configuring physical state change suppression on an Ethernet interface ······································· 29
Configuring dampening on an Ethernet interface ······································································ 30
Enabling link flapping protection on an interface ······································································· 31
Configuring fast retrain ······································································································· 32
Configuring storm suppression ····························································································· 33
Configuring generic flow control on an Ethernet interface ··························································· 33
Configuring PFC ··············································································································· 34
Setting PFC thresholds ······································································································· 35
Configuring PFC deadlock detection ······················································································ 37
Setting the statistics polling interval ······················································································· 38
Enabling loopback testing on an Ethernet interface ··································································· 39
Forcibly bringing up a fiber port ···························································································· 39
Enabling remote fault signal detection ···················································································· 40
Restoring the default settings for an interface ·········································································· 41
Configuring a Layer 2 Ethernet interface ······················································································· 41
Setting the MDIX mode of an Ethernet interface ······································································· 41
Setting the interface connection distance ················································································ 42
Configuring storm control on an Ethernet interface ··································································· 43
Changing a Layer 2 Ethernet interface to an FC interface ·························································· 44
Testing the cable connection of an Ethernet interface ································································ 44
Configuring the connection mode of an Ethernet interface ·························································· 45
Enabling bridging on an Ethernet interface ·············································································· 45
Configuring a Layer 3 Ethernet interface or subinterface··································································· 46
Setting the MTU for an Ethernet interface or subinterface ·························································· 46
Setting the MAC address of an Ethernet interface or subinterface ················································ 46
Enabling packet statistics collection on a Layer 3 Ethernet subinterface ········································ 47
Display and maintenance commands for Ethernet interfaces ····························································· 47
Configuring Ethernet link aggregation ················································· 49
About Ethernet link aggregation ·································································································· 49
Ethernet link aggregation application scenario ········································································· 49
Aggregate interface, aggregation group, and member port ························································· 49
Operational key ················································································································· 50
Configuration types ············································································································ 50
Link aggregation modes ······································································································ 51
How static link aggregation works ························································································· 51
Dynamic link aggregation ···································································································· 52
How dynamic link aggregation works ····················································································· 55
Edge aggregate interface ···································································································· 57
Load sharing modes for link aggregation groups ······································································ 57
S-MLAG ·························································································································· 57
Restrictions and guidelines: Mixed use of manual and automatic link aggregation configuration ················ 58
Ethernet link aggregation tasks at a glance ···················································································· 58
Configuring a manual link aggregation ·························································································· 59
Restrictions and guidelines for aggregation group configuration ·················································· 59
Configuring a Layer 2 aggregation group ················································································ 61
Configuring a Layer 3 aggregation group ················································································ 62
Configuring an S-channel bundle group·················································································· 64
Configuring S-MLAG················································································································· 65
Configuring an aggregate interface ······························································································ 66
Configuring the description of an aggregate interface ································································ 66
Setting the MAC address for an aggregate interface ································································· 67
Configuring jumbo frame support ·························································································· 67
Setting the MTU for a Layer 3 aggregate interface ···································································· 68
Setting the expected bandwidth for an aggregate interface ························································· 68
Configuring an edge aggregate interface ················································································ 69
Configuring physical state change suppression on an aggregate interface ····································· 69
Shutting down an aggregate interface ···················································································· 70
Enabling packet statistics on Layer 3 aggregate subinterfaces ···················································· 71
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Restoring the default settings for an aggregate interface ···························································· 71
Enabling transparent LACPDU transmission ·················································································· 72
Setting the minimum and maximum numbers of Selected ports for an aggregation group ························ 73
Disabling the default action of selecting a Selected port for dynamic aggregation groups that have not received
LACPDUs ······························································································································ 74
Configuring a dynamic aggregation group to use port speed as the prioritized criterion for reference port
selection ································································································································ 75
Ignoring port speed in setting the aggregation states of member ports ················································· 75
Specifying ignored VLANs for a Layer 2 aggregate interface ····························································· 76
Configuring load sharing for link aggregation groups ······································································· 77
Restrictions and guidelines for link-aggregation load sharing ······················································ 77
Setting static load sharing modes for link aggregation groups ····················································· 77
Specifying ignored packet fields for default link-aggregation load sharing ······································ 78
Enabling local-first load sharing for link aggregation ·································································· 79
Configuring link aggregation load sharing algorithm and hash seed settings ··································· 80
Setting a hash offset to adjust the load balancing results on link aggregations ································ 80
Setting the global load sharing mode for MAC-in-MAC traffic ······················································ 81
Setting the load sharing mode for tunneled traffic ····································································· 81
Specifying link aggregation management VLANs and link aggregation management port ························ 81
Excluding a subnet from load sharing on aggregate links ·································································· 82
Enabling a Layer 2 aggregate interface to reflect incoming packets back ············································· 83
Enabling link-aggregation traffic redirection ··················································································· 84
About link-aggregation traffic redirection ················································································· 84
Restrictions and guidelines for link-aggregation traffic redirection ················································ 84
Enabling link-aggregation traffic redirection globally ·································································· 84
Enabling link-aggregation traffic redirection for an aggregation group ··········································· 85
Enabling BFD for an aggregation group ························································································ 85
Display and maintenance commands for Ethernet link aggregation ····················································· 86
Ethernet link aggregation configuration examples ··········································································· 87
Example: Configuring a Layer 2 static aggregation group ··························································· 87
Example: Configuring a Layer 2 dynamic aggregation group ······················································· 89
Example: Configuring Layer 2 aggregation load sharing ···························································· 91
Example: Configuring a Layer 2 edge aggregate interface ·························································· 93
Example: Configuring a Layer 3 static aggregation group ··························································· 95
Example: Configuring a Layer 3 dynamic aggregation group ······················································· 96
Example: Configuring Layer 3 aggregation load sharing ···························································· 97
Example: Configuring a static S-channel bundle group ······························································ 99
Example: Configuring a dynamic S-channel bundle group ························································ 100
Example: Configuring S-MLAG ··························································································· 101
Configuring DRNI ········································································· 105
About DRNI ·························································································································· 105
DRNI network model ········································································································ 105
DRCP ··························································································································· 106
Keepalive and failover mechanism ······················································································ 106
MAD mechanism ············································································································· 107
DR system setup process ································································································· 107
Configuration consistency check ························································································· 108
DRNI failure handling mechanisms······················································································ 109
Protocols and standards ··································································································· 111
Restrictions and guidelines: DRNI configuration ··········································································· 111
DRNI tasks at a glance············································································································ 112
Configuring DR system settings ································································································ 112
Configuring the DR system MAC address ············································································· 112
Setting the DR system number ··························································································· 113
Setting the DR system priority ···························································································· 113
Setting the DR role priority of the device ····················································································· 113
Configuring DR keepalive settings ····························································································· 114
Restrictions and guidelines for configuring DR keepalive settings ·············································· 114
Configuring DR keepalive packet parameters ········································································ 114
Setting the DR keepalive interval and timeout timer ································································ 115
Excluding an interface from the shutdown action by DRNI MAD ······················································· 115
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Configuring a DR interface ······································································································· 116
Specifying a Layer 2 aggregate interface or VXLAN tunnel interface as the IPP ·································· 116
Disabling configuration consistency check ··················································································· 117
Enabling the short DRCP timeout timer on the IPP or a DR interface ················································ 117
Setting the keepalive hold timer for identifying the cause of IPL down events ······································ 118
Configuring DR system auto-recovery ························································································ 118
Setting the data restoration interval ···························································································· 119
Displaying and maintaining DRNI ······························································································ 119
DRNI configuration examples ··································································································· 120
Example: Configuring basic DRNI functions ·········································································· 120
Example: Configuring Layer 3 gateways on a DR system ························································· 124
Configuring port isolation ······························································· 132
About port isolation················································································································· 132
Assigning a port to an isolation group ························································································· 132
Display and maintenance commands for port isolation ··································································· 132
Port isolation configuration examples ························································································· 133
Example: Configuring port isolation ····················································································· 133
Configuring VLANs ······································································· 135
About VLANs ························································································································ 135
VLAN frame encapsulation ································································································ 135
VLAN types ···················································································································· 136
Port-based VLANs ··········································································································· 136
MAC-based VLANs ·········································································································· 137
IP subnet-based VLANs ···································································································· 139
Protocol-based VLANs ····································································································· 140
Layer 3 communication between VLANs ·············································································· 140
Protocols and standards ··································································································· 140
Configuring a VLAN ················································································································ 140
Restrictions and guidelines ································································································ 140
VLAN configuration tasks at a glance ·················································································· 140
Creating VLANs ·············································································································· 140
Enabling packet dropping in the VLAN ················································································· 141
Configuring port-based VLANs ·································································································· 141
Restrictions and guidelines for port-based VLANs ·································································· 141
Assigning an access port to a VLAN ···················································································· 141
Assigning a trunk port to a VLAN ························································································ 142
Assigning a hybrid port to a VLAN ······················································································· 143
Configuring MAC-based VLANs ································································································ 144
Restrictions and guidelines for MAC-based VLANs ································································· 144
Configuring static MAC-based VLAN assignment ··································································· 144
Configuring dynamic MAC-based VLAN assignment ······························································· 145
Configuring server-assigned MAC-based VLAN ····································································· 146
Configuring IP subnet-based VLANs ·························································································· 147
Configuring protocol-based VLANs ···························································································· 147
Configuring a VLAN group ······································································································· 149
Configuring VLAN interfaces ···································································································· 149
Restrictions and guidelines ································································································ 149
VLAN interfaces configuration tasks at a glance ····································································· 149
Prerequisites ·················································································································· 149
Creating a VLAN interface ································································································· 149
Specifying a traffic processing slot for the VLAN interface ························································ 150
Restoring the default settings for the VLAN interface ······························································· 150
Display and maintenance commands for VLANs ··········································································· 151
VLAN configuration examples ··································································································· 152
Example: Configuring port-based VLANs ·············································································· 152
Example: Configuring MAC-based VLANs ············································································ 153
Example: Configuring IP subnet-based VLANs ······································································ 155
Example: Configuring protocol-based VLANs ········································································ 157
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Configuring super VLANs ······························································· 161
About super VLANs ················································································································ 161
Restrictions and guidelines: Super VLAN configuration ·································································· 161
Super VLAN tasks at a glance ·································································································· 161
Creating a sub-VLAN ·············································································································· 161
Configuring a super VLAN ······································································································· 162
Configuring a super VLAN interface ··························································································· 162
Display and maintenance commands for super VLANs ·································································· 163
Super VLAN configuration examples ·························································································· 163
Example: Configuring a super VLAN···················································································· 163
Configuring private VLAN ······························································· 166
About private VLAN ················································································································ 166
Restrictions and guidelines: Private VLAN configuration ································································· 167
Private VLAN tasks at a glance ································································································· 167
Creating a primary VLAN ········································································································· 167
Creating secondary VLANs ······································································································ 167
Associating the primary VLAN with secondary VLANs···································································· 168
Configuring the uplink port ······································································································· 168
Configuring a downlink port ······································································································ 168
Configuring Layer 3 communication for secondary VLANs ······························································ 169
Display and maintenance commands for the private VLAN ····························································· 170
Private VLAN configuration examples ························································································· 170
Example: Configuring promiscuous ports ·············································································· 170
Example: Configuring trunk promiscuous ports ······································································ 173
Example: Configuring trunk promiscuous and trunk secondary ports ·········································· 176
Example: Configuring Layer 3 communication for secondary VLANs ·········································· 180
Configuring voice VLANs ······························································· 183
About voice VLANs ················································································································ 183
Working mechanism ········································································································ 183
Methods of identifying IP phones ························································································ 183
Advertising the voice VLAN information to IP phones ······························································ 184
IP phone access methods ································································································· 184
Voice VLAN assignment modes ························································································· 185
Cooperation of voice VLAN assignment modes and IP phones ················································· 186
Security mode and normal mode of voice VLANs ··································································· 187
Restrictions and guidelines: Voice VLAN configuration ··································································· 188
Voice VLAN tasks at a glance ··································································································· 188
Configuring the QoS priority settings for voice traffic ······································································ 188
Configuring voice VLAN assignment modes for a port ···································································· 189
Configuring a port to operate in automatic voice VLAN assignment mode ···································· 189
Configuring a port to operate in manual voice VLAN assignment mode ······································· 190
Enabling LLDP for automatic IP phone discovery ·········································································· 191
Configuring LLDP or CDP to advertise a voice VLAN ····································································· 192
Configuring LLDP to advertise a voice VLAN ········································································· 192
Configuring CDP to advertise a voice VLAN ·········································································· 192
Display and maintenance commands for voice VLANs ··································································· 193
Voice VLAN configuration examples ·························································································· 193
Example: Configuring automatic voice VLAN assignment mode ················································ 193
Example: Configuring manual voice VLAN assignment mode ··················································· 195
Configuring MVRP ········································································ 198
About MVRP ························································································································· 198
MRP implementation ········································································································ 198
MRP messages ·············································································································· 198
MRP timers ···················································································································· 200
MVRP registration modes ································································································· 200
Protocols and standards ··································································································· 201
Restrictions and guidelines: MVRP configuration ·········································································· 201
MVRP tasks at a glance ·········································································································· 201
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Prerequisites ························································································································· 201
Enabling MVRP ····················································································································· 202
Setting an MVRP registration mode ··························································································· 202
Setting MRP timers ················································································································ 202
Enabling GVRP compatibility ···································································································· 203
Display and maintenance commands for MVRP ··········································································· 204
MVRP configuration examples ·································································································· 204
Example: Configuring basic MVRP functions ········································································· 204
Configuring loopback, null, and inloopback interfaces ·························· 214
About loopback, null, and inloopback interfaces ············································································ 214
About loopback interfaces ································································································· 214
About null interfaces ········································································································ 214
About inloopback interfaces ······························································································· 214
Configuring a loopback interface ······························································································· 214
Configuring a null interface ······································································································· 215
Restoring the default settings for an interface ··············································································· 215
Display and maintenance commands for loopback, null, and inloopback interfaces ······························ 216
Configuring QinQ ········································································· 217
About QinQ ·························································································································· 217
QinQ benefits ················································································································· 217
How QinQ works ············································································································· 217
QinQ implementations ······································································································ 218
Protocols and standards ··································································································· 219
Restrictions and guidelines: QinQ configuration ············································································ 219
Enabling QinQ ······················································································································· 219
Configuring transmission for transparent VLANs ··········································································· 220
Configuring the TPID for VLAN tags ··························································································· 221
About TPID ···················································································································· 221
Restrictions and guidelines ································································································ 221
Configuring the TPID for CVLAN tags ·················································································· 222
Configuring the TPID for SVLAN tags ·················································································· 222
Setting the 802.1p priority in SVLAN tags ···················································································· 222
About the 802.1p priority in SVLAN tags ··············································································· 222
Prerequisites for setting the 802.1p priority in SVLAN tags ······················································· 222
Tasks at a glance ············································································································ 223
Creating a traffic class and configuring CVLAN match criteria ··················································· 223
Creating a traffic behavior and configuring a priority marking action for SVLAN tags ······················ 223
Creating a QoS policy ······································································································ 223
Applying the QoS policy ···································································································· 224
Display and maintenance commands for QinQ ············································································· 224
QinQ configuration examples ···································································································· 224
Example: Configuring basic QinQ ······················································································· 224
Example: Configuring VLAN transparent transmission ····························································· 226
Configuring VLAN mapping ···························································· 229
About VLAN mapping ············································································································· 229
VLAN mapping types ······································································································· 229
VLAN mapping application scenarios ··················································································· 229
VLAN mapping implementations ························································································· 232
Restrictions and guidelines: VLAN mapping configuration ······························································· 235
VLAN mapping tasks at a glance ······························································································· 235
Prerequisites ························································································································· 236
Configuring one-to-one VLAN mapping ······················································································· 236
Configuring many-to-one VLAN mapping ···················································································· 236
About many-to-one VLAN mapping ····················································································· 236
Configuring many-to-one VLAN mapping in dynamic IP address assignment environment ·············· 237
Configuring many-to-one VLAN mapping in static IP address assignment environment ·················· 239
Configuring one-to-two VLAN mapping ······················································································· 241
Configuring two-to-one VLAN mapping ······················································································· 241
Configuring two-to-two VLAN mapping ······················································································· 242
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Display and maintenance commands for VLAN mapping ································································ 243
VLAN mapping configuration examples ······················································································ 243
Example: Configuring one-to-one and many-to-one VLAN mapping ··········································· 243
Example: Configuring one-to-two and two-to-two VLAN mapping ··············································· 248
Configuring PBB ·········································································· 251
About PBB ··························································································································· 251
PBB network model ········································································································· 251
Terminology ··················································································································· 252
PBB frame format ············································································································ 252
PBB frame forwarding ······································································································ 253
PBB data encapsulation types ···························································································· 254
Protocols and standards ··································································································· 255
PBB tasks at a glance ············································································································· 255
Enabling L2VPN ···················································································································· 255
Creating a PBB VSI ················································································································ 255
Configuring a B-VLAN for a PBB VSI ························································································· 256
Configuring an uplink port ········································································································ 256
Configuring a downlink port ······································································································ 257
Configuring the data encapsulation type ····················································································· 257
Display and maintenance commands for PBB ·············································································· 258
PBB configuration examples ····································································································· 258
Example: Configuring a basic PBB network ··········································································· 258
Troubleshooting PBB ·············································································································· 259
Failed to transmit customer frames to peer ··········································································· 259
Configuring loop detection ······························································ 261
About loop detection ··············································································································· 261
Loop detection mechanism ································································································ 261
Loop detection interval ····································································································· 262
Loop protection actions ····································································································· 262
Port status auto recovery ·································································································· 262
Loop detection tasks at a glance ······························································································· 263
Enabling loop detection ··········································································································· 263
Restrictions and guidelines for loop detection configuration ······················································ 263
Enabling loop detection globally ························································································· 263
Enabling loop detection on a port ························································································ 264
Setting the loop protection action ······························································································· 264
Restrictions and guidelines for loop protection action configuration ············································ 264
Setting the global loop protection action ··············································································· 264
Setting the loop protection action on an interface ··································································· 264
Setting the loop detection interval ······························································································ 265
Display and maintenance commands for loop detection ································································· 265
Loop detection configuration examples ······················································································· 265
Example: Configuring basic loop detection functions ······························································· 265
Spanning tree protocol overview ······················································ 269
About STP ···························································································································· 269
STP protocol frames ········································································································ 269
Basic concepts in STP ······································································································ 271
Calculation process of the STP algorithm ············································································· 272
Example of STP calculation ······························································································· 273
The configuration BPDU forwarding mechanism of STP ·························································· 277
STP timers ····················································································································· 278
About RSTP ························································································································· 278
RSTP protocol frames ······································································································ 279
Basic concepts in RSTP ··································································································· 279
How RSTP works ············································································································ 279
RSTP BPDU processing ··································································································· 280
About PVST ·························································································································· 280
PVST protocol frames ······································································································ 281
How PVST works ············································································································ 281
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About MSTP ························································································································· 281
MSTP features ················································································································ 281
MSTP protocol frames ······································································································ 282
Basic concepts in MSTP ··································································································· 283
How MSTP works ············································································································ 286
MSTP implementation on devices ······················································································· 287
Rapid transition mechanism ····································································································· 287
Edge port rapid transition ·································································································· 287
Root port rapid transition ··································································································· 288
P/A transition ·················································································································· 288
Protocols and standards ·········································································································· 290
Configuring spanning tree protocols ················································· 291
Restrictions and guidelines: spanning tree protocol configuration ····················································· 291
Restrictions: Compatibility with other features ········································································ 291
Restrictions: Interface configuration ····················································································· 291
Spanning tree protocol tasks at a glance ····················································································· 292
STP tasks at a glance ······································································································ 292
RSTP tasks at a glance ···································································································· 293
PVST tasks at a glance ···································································································· 294
MSTP tasks at a glance ···································································································· 295
Setting the spanning tree mode ································································································· 296
Configuring an MST region ······································································································ 297
Configuring the root bridge or a secondary root bridge ··································································· 298
Restrictions and guidelines ································································································ 298
Configuring the device as the root bridge of a spanning tree ····················································· 298
Configuring the device as a secondary root bridge of a spanning tree ········································· 298
Configuring the device priority ··································································································· 299
Configuring the maximum hops of an MST region ········································································· 299
Configuring the network diameter of a switched network································································· 300
Setting spanning tree timers ····································································································· 300
Setting the timeout factor ········································································································· 302
Configuring the BPDU transmission rate ····················································································· 302
Configuring edge ports ············································································································ 303
Configuring path costs of ports ·································································································· 303
About path cost ··············································································································· 303
Specifying a standard for the default path cost calculation ························································ 303
Configuring path costs of ports ··························································································· 306
Configuring the port priority ······································································································ 306
Configuring the port link type ···································································································· 307
Configuring the mode a port uses to recognize and send MSTP frames ············································· 308
Enabling outputting port state transition information ······································································· 308
Enabling the spanning tree feature ···························································································· 309
Restrictions and guidelines ································································································ 309
Enabling the spanning tree feature in STP/RSTP/MSTP mode ·················································· 309
Enabling the spanning tree feature in PVST mode ·································································· 309
Performing mCheck ················································································································ 310
About mCheck ················································································································ 310
Restrictions and guidelines ································································································ 310
Performing mCheck globally ······························································································ 310
Performing mCheck in interface view ··················································································· 310
Disabling inconsistent PVID protection ······················································································· 311
Configuring Digest Snooping ···································································································· 311
Configuring No Agreement Check ····························································································· 312
Configuring TC Snooping ········································································································· 314
Configuring protection features ································································································· 315
Spanning tree protection tasks at a glance ············································································ 315
Configuring BPDU guard ··································································································· 315
Enabling root guard ········································································································· 316
Enabling loop guard ········································································································· 317
Configuring port role restriction ··························································································· 318
Configuring TC-BPDU transmission restriction ······································································· 318
ix
Enabling TC-BPDU guard ································································································· 319
Enabling BPDU drop ········································································································ 319
Enabling PVST BPDU guard ······························································································ 320
Disabling dispute guard ···································································································· 320
Enabling the device to log events of detecting or receiving TC BPDUs ·············································· 322
Disabling the device from reactivating edge ports shut down by BPDU guard ····································· 323
Enabling BPDU transparent transmission on a port ······································································· 323
Enabling SNMP notifications for new-root election and topology change events ·································· 324
Display and maintenance commands for the spanning tree protocols ················································ 324
Spanning tree configuration examples ························································································ 325
Example: Configuring MSTP ······························································································ 325
Example: Configuring PVST ······························································································ 329
Example: Configuring DRNI with PVST ················································································ 332
Configuring LLDP ········································································· 335
About LLDP ·························································································································· 335
LLDP agents and bridge modes ························································································· 335
LLDP frame formats ········································································································· 336
LLDPDUs ······················································································································ 337
TLVs····························································································································· 337
Management address ······································································································· 340
LLDP operating modes ····································································································· 340
Transmitting and receiving LLDP frames ·············································································· 341
Collaboration with Track ··································································································· 341
Protocols and standards ··································································································· 341
Restrictions and guidelines: LLDP configuration ··········································································· 342
LLDP tasks at a glance ··········································································································· 342
Enabling LLDP ······················································································································ 343
Setting the LLDP bridge mode ·································································································· 343
Setting the LLDP operating mode ······························································································ 343
Setting the LLDP reinitialization delay ························································································· 344
Configuring the advertisable TLVs ····························································································· 344
Configuring advertisement of the management address TLV ··························································· 347
Setting the encapsulation format for LLDP frames ········································································· 348
Setting LLDP frame transmission parameters ·············································································· 349
Setting the timeout for receiving LLDP frames ·············································································· 349
Enabling LLDP polling ············································································································· 350
Disabling LLDP PVID inconsistency check ·················································································· 350
Configuring CDP compatibility ·································································································· 350
Configuring LLDP trapping and LLDP-MED trapping······································································ 352
Configuring LLDP neighbor validation and aging ··········································································· 353
Configuring LLDP neighbor validation on an interface ····························································· 353
Configuring LLDP neighbor aging on an interface ··································································· 353
Configuring MAC address learning for DCN ················································································· 354
About MAC address learning for DCN ·················································································· 354
MAC address learning for DCN tasks at a glance ··································································· 354
Setting the source MAC address of LLDP frames ··································································· 354
Enabling generation of ARP or ND entries for received management address TLVs ······················ 355
Display and maintenance commands for LLDP ············································································ 355
LLDP configuration examples ··································································································· 356
Example: Configuring basic LLDP functions ·········································································· 356
Example: Configuring CDP-compatible LLDP ········································································ 360
Configuring DCBX ········································································ 363
About DCBX ························································································································· 363
DCBX versions ··············································································································· 363
DCBX functions ·············································································································· 363
DCBX application scenario ································································································ 363
Protocols and standards ··································································································· 364
DCBX tasks at a glance ··········································································································· 364
Enabling LLDP and DCBX TLV advertising ·················································································· 364
Setting the DCBX version ········································································································ 365
x
Configuring APP parameters ···································································································· 365
Configuring ETS parameters ···································································································· 367
About ETS parameters ····································································································· 367
Restrictions and guidelines ································································································ 367
Configuring the 802.1p-to-local priority mapping ····································································· 367
Configuring group-based WRR queuing ··············································································· 368
Configuring PFC parameters ···································································································· 369
DCBX configuration examples ·································································································· 369
Example: Configuring DCBX ······························································································ 369
Configuring L2PT ········································································· 375
About L2PT ·························································································································· 375
L2PT application scenario ································································································· 375
Supported protocols ········································································································· 375
L2PT operating mechanism ······························································································· 376
L2PT tasks at a glance ············································································································ 377
Enabling L2PT ······················································································································ 377
Restrictions and guidelines for L2PT···················································································· 377
Enabling L2PT for a protocol in Layer 2 Ethernet interface view ················································ 378
Enabling L2PT for a protocol in Layer 2 aggregate interface view ·············································· 378
Setting the destination multicast MAC address for tunneled packets ················································· 378
Display and maintenance commands for L2PT ············································································· 379
L2PT configuration examples ··································································································· 379
Example: Configuring L2PT for STP ···················································································· 379
Example: Configuring L2PT for LACP ·················································································· 380
Configuring service loopback groups ················································ 385
About service loopback groups ································································································· 385
Restrictions and guidelines: Service loopback group configuration ···················································· 385
Configuring a service loopback group ························································································· 385
Display and maintenance commands for service loopback groups ···················································· 386
Service loopback group configuration examples ··········································································· 386
Example: Configuring a service loopback group ····································································· 386
Configuring cut-through Layer 2 forwarding········································ 387
About cut-through Layer 2 forwarding ························································································· 387
Restrictions and guidelines for cut-through Layer 2 forwarding configuration ······································· 387
Procedure ···························································································································· 387
Document conventions and icons ···················································· 388
Conventions ························································································································· 388
Network topology icons ··········································································································· 389
Support and other resources ·························································· 390
Accessing Hewlett Packard Enterprise Support ············································································ 390
Accessing updates ················································································································· 390
Websites ······················································································································· 391
Customer self repair ········································································································· 391
Remote support ·············································································································· 391
Documentation feedback ·································································································· 391
Index ························································································· 393
1
Configuring the MAC address table
About the MAC address table
An Ethernet device uses a MAC address table to forward frames. A MAC address entry includes a
destination MAC address, an outgoing interface, and a VLAN ID. When the device receives a frame,
it uses the destination MAC address of the frame to look for a match in the MAC address table.
• The device forwards the frame out of the outgoing interface in the matching entry if a match is
found.
• The device floods the frame in the VLAN of the frame if no match is found.
How a MAC address entry is created
The entries in the MAC address table include entries automatically learned by the device and entries
manually added.
MAC address learning
The device can automatically populate its MAC address table by learning the source MAC addresses
of incoming frames on each interface.
The device performs the following operations to learn the source MAC address of incoming packets:
1. Checks the source MAC address (for example, MAC-SOURCE) of the frame.
2. Looks up the source MAC address in the MAC address table.
ï‚¡ The device updates the entry if an entry is found.
ï‚¡ The device adds an entry for MAC-SOURCE and the incoming port if no entry is found.
When the device receives a frame destined for MAC-SOURCE after learning this source MAC
address, the device performs the following operations:
3. Finds the MAC-SOURCE entry in the MAC address table.
4. Forwards the frame out of the port in the entry.
The device performs the learning process for each incoming frame with an unknown source MAC
address until the table is fully populated.
Manually configuring MAC address entries
Dynamic MAC address learning does not distinguish between illegitimate and legitimate frames,
which can invite security hazards. When Host A is connected to Port A, a MAC address entry will be
learned for the MAC address of Host A (for example, MAC A). When an illegal user sends frames
with MAC A as the source MAC address to Port B, the device performs the following operations:
1. Learns a new MAC address entry with Port B as the outgoing interface and overwrites the old
entry for MAC A.
2. Forwards frames destined for MAC A out of Port B to the illegal user.
As a result, the illegal user obtains the data of Host A. To improve the security for Host A, manually
configure a static entry to bind Host A to Port A. Then, the frames destined for Host A are always sent
out of Port A. Other hosts using the forged MAC address of Host A cannot obtain the frames destined
for Host A.
Types of MAC address entries
A MAC address table can contain the following types of entries:
2
• Static entries—A static entry is manually added to forward frames with a specific destination
MAC address out of the associated interface, and it never ages out. A static entry has higher
priority than a dynamically learned one.
• Dynamic entries—A dynamic entry can be manually configured or dynamically learned to
forward frames with a specific destination MAC address out of the associated interface. A
dynamic entry might age out. A manually configured dynamic entry has the same priority as a
dynamically learned one.
• Blackhole entries—A blackhole entry is manually configured and never ages out. A blackhole
entry is configured for filtering out frames with a specific source or destination MAC address.
For example, to block all frames destined for or sourced from a user, you can configure the
MAC address of the user as a blackhole MAC address entry. A blackhole entry has higher
priority than a dynamically learned one.
• Multiport unicast entries—A multiport unicast entry is manually added to send frames with a
specific unicast destination MAC address out of multiple ports, and it never ages out. A multiport
unicast entry has higher priority than a dynamically learned one.
A static or blackhole MAC address entry can overwrite a dynamic MAC address entry. A dynamic
MAC address entry cannot overwrite a static, blackhole, or multiport unicast MAC address entry. A
static entry, a blackhole entry, and a multiport unicast entry cannot overwrite one another.
A multicast unicast MAC address entry does not affect learning the corresponding dynamic MAC
address entry. For the same MAC address, a multiport unicast MAC address entry and a dynamic
MAC address entry can coexist, and the multiport unicast MAC address takes priority.
This document does not cover the configuration of static multicast MAC address entries and MAC
address entries in VPLS. For more information about configuring static multicast MAC address
entries, see IGMP snooping in IP Multicast Configuration Guide. For more information about MAC
address table configuration in VPLS, see VPLS in MPLS Configuration Guide.
MAC address table tasks at a glance
All MAC address table configuration tasks are optional.
To configure the MAC address table, perform the following tasks:
• Configuring MAC address entries
ï‚¡ Adding or modifying a static or dynamic MAC address entry
ï‚¡ Adding or modifying a blackhole MAC address entry
ï‚¡ Adding or modifying a multiport unicast MAC address entry
ï‚¡ Adding or modifying a multiport unicast MAC address entry for VXLAN
• Setting the aging timer for dynamic MAC address entries
• Configuring MAC address learning
ï‚¡ Disabling MAC address learning
ï‚¡ Setting the MAC learning limit
ï‚¡ Configuring the unknown frame forwarding rule after the MAC learning limit is reached
ï‚¡ Assigning MAC learning priority to interfaces
• Enabling MAC address synchronization
• Configuring MAC address move notifications and suppression
• Enabling ARP fast update for MAC address moves
• Disabling static source check
• Enabling SNMP notifications for the MAC address table
3
Configuring MAC address entries
About MAC address entry-based frame forwarding
A frame whose source MAC address matches different types of MAC address entries is processed
differently.
Type
Description
Static MAC address entry Forwards the frame according to the destination MAC address regardless of
whether the frame's ingress interface is the same as that in the entry.
Multiport unicast MAC
address entry
• Learns the MAC address of the frame and generates a dynamic MAC
address entry, but the generated dynamic MAC address entry does not
take effect.
• Forwards the frame based on the multiport unicast MAC address entry.
Blackhole MAC address
entry Drops the frame.
Dynamic MAC address
entry
• Learns the MAC address of the frames received on a different interface
from that in the entry and overwrites the original entry.
• Forwards the frame received on the same interface as that in the entry
and updates the aging timer for the entry.
Restrictions and guidelines for MAC address entry
configuration
A manually configured dynamic MAC address entry will overwrite a learned entry that already exists
with a different outgoing interface for the MAC address.
The manually configured static, blackhole, and multiport unicast MAC address entries cannot survive
a reboot if you do not save the configuration. The manually configured dynamic MAC address entries
are lost upon reboot whether or not you save the configuration.
You cannot configure the following addresses as static, dynamic, blackhole, or multiport unicast
MAC addresses:
• Reserved MAC addresses of the device.
• MAC addresses of Layer 3 Ethernet interfaces or subinterfaces
• MAC addresses of Layer 3 aggregate interfaces or subinterfaces.
Reserved MAC addresses of the device are addresses from the bridge MAC address of the device to
the bridge MAC address plus 169. For more information about bridge MAC addresses, see IRF
Configuration Guide. For more information about the bridge MAC address, see IRF configuration in
Virtual Technologies Configuration Guide.
Prerequisites for MAC address entry configuration
Before manually configuring a MAC address entry for an interface, make sure the VLAN in the entry
has been created.
4
Adding or modifying a static or dynamic MAC address entry
Adding or modifying a static or dynamic MAC address entry globally
1. Enter system view.
system-view
2. Add or modify a static or dynamic MAC address entry.
mac-address { dynamic | static } mac-address interface interface-type
interface-number vlan vlan-id
By default, no MAC address entry is configured globally.
Make sure you have assigned the interface to the VLAN.
Adding or modifying a static or dynamic MAC address entry on an interface
1. Enter system view.
system-view
2. Enter interface view.
ï‚¡ Enter Layer 2 Ethernet interface view.
interface interface-type interface-number
ï‚¡ Enter Layer 2 aggregate interface view.
interface bridge-aggregation interface-number
ï‚¡ Enter S-channel interface view.
interface s-channel interface-number.channel-id
ï‚¡ Enter S-channel aggregate interface view.
interface schannel-aggregation interface-number:channel-id
ï‚¡ Enter S-channel bundle interface view.
interface schannel-bundle interface-number
3. Add or modify a static or dynamic MAC address entry.
mac-address { dynamic | static } mac-address vlan vlan-id
By default, no MAC address entry is configured on an interface.
Make sure you have assigned the interface to the VLAN.
Adding or modifying a blackhole MAC address entry
1. Enter system view.
system-view
2. Add or modify a blackhole MAC address entry.
mac-address blackhole mac-address vlan vlan-id
By default, no blackhole MAC address entry is configured.
Adding or modifying a multiport unicast MAC address entry
About multiport unicast MAC address entry configuration
You can configure a multiport unicast MAC address entry to associate a unicast destination MAC
address with multiple ports. The frame with a destination MAC address matching the entry is sent out
of multiple ports.
For example, in NLB unicast mode (see Figure 1):
5
• All servers within a cluster uses the cluster's MAC address as their own address.
• Frames destined for the cluster are forwarded to every server in the group.
In this case, you can configure a multiport unicast MAC address entry on the device connected to the
server group. Then, the device forwards the frame destined for the server group to every server
through all ports connected to the servers within the cluster.
Figure 1 NLB cluster
You can configure a multiport unicast MAC address entry globally or on an interface.
Configuring a multiport unicast MAC address entry globally
1. Enter system view.
system-view
2. Add or modify a multiport unicast MAC address entry.
mac-address multiport mac-address interface interface-list vlan
vlan-id
By default, no multiport unicast MAC address entry is configured globally.
Make sure you have assigned the interface to the VLAN.
Configuring a multiport unicast MAC address entry on an interface
1. Enter system view.
system-view
2. Enter interface view.
ï‚¡ Enter Layer 2 Ethernet interface view.
interface interface-type interface-number
ï‚¡ Enter Layer 2 aggregate interface view.
interface bridge-aggregation interface-number
3. Add the interface to a multiport unicast MAC address entry.
mac-address multiport mac-address vlan vlan-id
By default, no multiport unicast MAC address entry is configured on an interface.
Make sure you have assigned the interface to the VLAN.
NLB cluster
Device
6
Adding or modifying a multiport unicast MAC address entry
for VXLAN
About VXLAN multiport unicast MAC address entries
VXLAN has local and remote MAC addresses. A local MAC address is the MAC address of a VM in
the local site. A remote MAC address is the MAC address of a VM in a remote site.
To send frames destined for a local or remote MAC address out of multiple ports, configure a
multiport unicast MAC address entry. For more information about VXLAN, see VXLAN Configuration
Guide.
Restrictions and guidelines
Do not specify the tunnel interfaces automatically created by using ENDP or EVPN as outgoing
interfaces for a remote multiport unicast MAC address entry. If you do so, the numbers of these
tunnel interfaces might change during tunnel re-establishment, and the related entries cannot be
restored as a result. For more information about ENDP, see VXLAN Configuration Guide. For more
information about EVPN, see EVPN Configuration Guide.
In an EVPN network, you cannot configure the same multiport unicast MAC address entry on
multiple leaf nodes or VTEPs. When configured with EVPN multihoming or EVPN distributed relay, a
VTEP does not support synchronization of multiport unicast MAC address entries. For more
information about EVPN, see EVPN Configuration Guide.
Procedure
1. Enter system view.
system-view
2. Add or modify a multiport unicast MAC address entry for VXLAN.
ï‚¡ Add or modify a local multiport unicast MAC address entry.
mac-address multiport mac-address { interface { interface-type
interface-number service-instance instance-id }&<1-4> } vsi
vsi-name
For successful configuration, make sure the specified Ethernet service instances have been
mapped to the specified VSI.
ï‚¡ Add or modify a remote multiport unicast MAC address entry.
mac-address multiport mac-address { interface { tunnel
tunnel-number1 [ to tunnel tunnel-number2 ] }&<1-4> } vsi vsi-name
For successful configuration, make sure the specified VXLAN tunnel interfaces have been
associated with the specified VSI.
Setting the aging timer for dynamic MAC address
entries
About aging timer for dynamic MAC address entries
For security and efficient use of table space, the MAC address table uses an aging timer for each
dynamic MAC address entry. If a dynamic MAC address entry is not updated before the aging timer
expires, the device deletes the entry. This aging mechanism ensures that the MAC address table can
promptly update to accommodate latest network topology changes.
A stable network requires a longer aging interval, and an unstable network requires a shorter aging
interval.
7
An aging interval that is too long might cause the MAC address table to retain outdated entries. As a
result, the MAC address table resources might be exhausted, and the MAC address table might fail
to update its entries to accommodate the latest network changes.
An interval that is too short might result in removal of valid entries, which would cause unnecessary
floods and possibly affect the device performance.
To reduce floods on a stable network, set a long aging timer or disable the timer to prevent dynamic
entries from unnecessarily aging out. Reducing floods improves the network performance. Reducing
flooding also improves the security because it reduces the chances for a data frame to reach
unintended destinations.
Procedure
1. Enter system view.
system-view
2. Set the aging timer for dynamic MAC address entries.
mac-address timer { aging seconds | no-aging }
The default setting is 300 seconds.
Disabling MAC address learning
About disabling MAC address learning
MAC address learning is enabled by default. To prevent the MAC address table from being saturated
when the device is experiencing attacks, disable MAC address learning. For example, you can
disable MAC address learning to prevent the device from being attacked by a large amount of frames
with different source MAC addresses.
After MAC address learning is disabled, the device immediately deletes existing dynamic MAC
address entries.
Disabling global MAC address learning
Restrictions and guidelines
After you disable global MAC address learning, the device cannot learn MAC addresses on any
interfaces.
Global MAC address learning does not take effect on a TRILL network, S-channel, VPLS VSI, EVB
VSI, or VXLAN VSI. For information about TRILL, see TRILL Configuration Guide. For information
about VPLS VSIs, see MPLS Configuration Guide. For information about S-channels and EVB VSIs,
see EVB Configuration Guide. For information about VXLAN VSIs, see VXLAN Configuration Guide.
Procedure
1. Enter system view.
system-view
2. Disable global MAC address learning.
undo mac-address mac-learning enable
By default, global MAC address learning is enabled.
8
Disabling MAC address learning on an interface
About disabling MAC address learning on an interface
When global MAC address learning is enabled, you can disable MAC address learning on a single
interface.
Procedure
1. Enter system view.
system-view
2. Enter interface view.
ï‚¡ Enter Layer 2 Ethernet interface view.
interface interface-type interface-number
ï‚¡ Enter Layer 2 aggregate interface view.
interface bridge-aggregation interface-number
ï‚¡ Enter S-channel interface view.
interface s-channel interface-number.channel-id
ï‚¡ Enter S-channel aggregate interface view.
interface schannel-aggregation interface-number:channel-id
ï‚¡ Enter S-channel bundle interface view.
interface schannel-bundle interface-number
3. Disable MAC address learning on the interface.
undo mac-address mac-learning enable
By default, MAC address learning is enabled on an interface.
Disabling MAC address learning on a VLAN
About disabling MAC address learning on a VLAN
When global MAC address learning is enabled, you can disable MAC address learning on a
per-VLAN basis.
Procedure
1. Enter system view.
system-view
2. Enter VLAN view.
vlan vlan-id
3. Disable MAC address learning on the VLAN.
undo mac-address mac-learning enable
By default, MAC address learning on the VLAN is enabled.
Setting the MAC learning limit
About interface-based MAC learning limit
This feature limits the MAC address table size. A large MAC address table will degrade forwarding
performance.
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Aruba JH396A Configuration Guide
- Category
- Networking
- Type
- Configuration Guide
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