Aruba R9Y12A Reference guide

HPE Networking Comware 5960 Switch Series

Layer 3—IP Services Command Reference

Software

version: Release 9126P01 and later

Document version: 6W100-20230428

The information contained herein is subject to change without notice. The only warranties for Hewlett Packard

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Acknowledgments

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Contents

ARP commands ····························································································· 1

arp check log enable ·································································································································· 1

arp mac-interface-consistency check enable ····························································································· 1

arp max-learning-num ································································································································ 2

arp max-learning-number ··························································································································· 3

arp mode uni ·············································································································································· 4

arp static ····················································································································································· 4

arp timer aging ··········································································································································· 6

arp timer aging probe-count ······················································································································· 7

arp timer aging probe-interval ···················································································································· 8

arp user-ip-conflict record enable··············································································································· 9

arp user-move record enable ··················································································································· 10

display arp ················································································································································ 10

display arp entry-limit ······························································································································· 13

display arp ip-address ······························································································································ 13

display arp timer aging ····························································································································· 14

display arp usage ····································································································································· 14

display arp user-ip-conflict record ············································································································ 15

display arp user-move record ··················································································································· 16

display arp vpn-instance ·························································································································· 18

reset arp ··················································································································································· 18

Gratuitous ARP commands ········································································· 20

arp ip-conflict log prompt ·························································································································· 20

arp send-gratuitous-arp ···························································································································· 20

gratuitous-arp mac-change retransmit ····································································································· 21

gratuitous-arp-learning enable ················································································································· 22

gratuitous-arp-sending enable ················································································································· 23

Proxy ARP commands ················································································· 24

display local-proxy-arp ····························································································································· 24

display proxy-arp ······································································································································ 24

display proxy-arp statistics ······················································································································· 25

local-proxy-arp enable ······························································································································ 26

proxy-arp enable ······································································································································ 27

IP addressing commands ············································································ 28

display ip interface ··································································································································· 28

display ip interface brief ··························································································································· 30

ip address ················································································································································· 32

DHCP commands ························································································ 34

Common DHCP commands ····························································································································· 34

dhcp client-detect ····································································································································· 34

dhcp dscp ················································································································································· 34

dhcp enable ·············································································································································· 35

dhcp select ··············································································································································· 35

DHCP relay agent commands ························································································································· 36

dhcp relay always-unicast ························································································································ 36

dhcp relay check mac-address ················································································································ 37

dhcp relay check mac-address aging-time······························································································· 37

dhcp relay client-information record ········································································································· 38

dhcp relay client-information refresh ········································································································ 39

dhcp relay client-information refresh enable ···························································································· 39

dhcp relay dhcp-server timeout ················································································································ 40

dhcp relay forward reply by-option82 ······································································································· 41

dhcp relay gateway ·································································································································· 42

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dhcp relay information circuit-id ··············································································································· 42

dhcp relay information enable ·················································································································· 44

dhcp relay information remote-id ·············································································································· 45

dhcp relay information link-selection ········································································································ 46

dhcp relay information strategy ················································································································ 47

dhcp relay insert option60 ························································································································ 48

dhcp relay master-server switch-delay ····································································································· 49

dhcp relay release ip ································································································································ 50

dhcp relay server-address ························································································································ 50

dhcp relay server-address algorithm ········································································································ 51

dhcp relay source-address ······················································································································· 52

dhcp-server timeout ································································································································· 54

dhcp smart-relay enable ··························································································································· 55

display dhcp relay check mac-address ···································································································· 55

display dhcp relay client-information ········································································································ 56

display dhcp relay information ·················································································································· 58

display dhcp relay server-address ··········································································································· 59

display dhcp relay statistics ······················································································································ 60

gateway-list ·············································································································································· 61

master-server switch-delay ······················································································································ 62

remote-server ··········································································································································· 63

remote-server algorithm ··························································································································· 63

reset dhcp relay client-information ··········································································································· 64

reset dhcp relay statistics ························································································································· 65

DHCP client commands ··································································································································· 65

dhcp client dad enable ····························································································································· 65

dhcp client dscp ······································································································································· 66

dhcp client identifier ································································································································· 66

display dhcp client ···································································································································· 67

ip address dhcp-alloc ······························································································································· 70

BOOTP client commands································································································································· 70

display bootp client ··································································································································· 70

ip address bootp-alloc ······························································································································ 71

Basic IP forwarding commands ··································································· 73

display fib ················································································································································· 73

forwarding split-horizon ···························································································································· 75

IP performance optimization commands ······················································ 76

display icmp statistics ······························································································································· 76

display ip statistics ··································································································································· 77

display rawip ············································································································································ 79

display rawip verbose ······························································································································· 80

display tcp ················································································································································ 83

display tcp verbose ·································································································································· 84

display udp ··············································································································································· 89

display udp socket-loadbalance ··············································································································· 89

display udp socket-loadbalance verbose ································································································· 90

display udp statistics ································································································································ 92

display udp verbose ································································································································· 93

ip forward-broadcast ································································································································ 96

ip icmp error-interval ································································································································ 97

ip icmp fragment discarding ····················································································································· 98

ip icmp source ·········································································································································· 98

ip mtu ······················································································································································· 99

ip redirects enable ·································································································································· 100

ip ttl-expires enable ································································································································ 100

ip unreachables enable ·························································································································· 101

ip virtual-reassembly enable ·················································································································· 102

reset ip statistics ····································································································································· 103

reset udp statistics ································································································································· 104

statistics l3-packet enable ······················································································································ 104

iii

tcp mss ··················································································································································· 105

tcp path-mtu-discovery ··························································································································· 106

tcp syn-cookie enable ···························································································································· 106

tcp timer fin-timeout ································································································································ 107

tcp timer syn-timeout ······························································································································ 108

tcp window ············································································································································· 108

IPv6 basics commands ·············································································· 110

display ipv6 fib ········································································································································ 110

display ipv6 icmp statistics ····················································································································· 111

display ipv6 interface ······························································································································ 113

display ipv6 interface prefix ···················································································································· 117

display ipv6 prefix ··································································································································· 118

display ipv6 rawip ··································································································································· 119

display ipv6 rawip verbose ····················································································································· 120

display ipv6 statistics ······························································································································ 124

display ipv6 tcp ······································································································································· 127

display ipv6 tcp verbose ························································································································· 128

display ipv6 udp ····································································································································· 134

display ipv6 udp verbose ························································································································ 135

ipv6 address ··········································································································································· 139

ipv6 address anycast ····························································································································· 140

ipv6 address auto ··································································································································· 140

ipv6 address auto link-local ···················································································································· 141

ipv6 address eui-64 ································································································································ 142

ipv6 address link-local ···························································································································· 143

ipv6 address prefix-number ···················································································································· 144

ipv6 hop-limit ·········································································································································· 145

ipv6 hoplimit-expires enable ··················································································································· 146

ipv6 icmpv6 error-interval ······················································································································· 146

ipv6 icmpv6 multicast-echo-reply enable ······························································································· 147

ipv6 icmpv6 source ································································································································ 148

ipv6 prefer temporary-address ··············································································································· 148

ipv6 prefix ··············································································································································· 149

ipv6 redirects enable ······························································································································ 150

ipv6 temporary-address ························································································································· 150

ipv6 unreachables enable ······················································································································ 152

reset ipv6 statistics ································································································································· 152

IPv6 neighbor discovery commands ·························································· 154

display ipv6 nd proxy statistics ··············································································································· 154

display ipv6 nd ra prefix ························································································································· 154

display ipv6 nd user-ip-conflict record ···································································································· 155

display ipv6 nd user-move record ·········································································································· 156

display ipv6 neighbors ···························································································································· 158

display ipv6 neighbors count ·················································································································· 161

display ipv6 neighbors entry-limit ··········································································································· 161

display ipv6 neighbors statistics ············································································································· 162

display ipv6 neighbors vpn-instance ······································································································ 163

ipv6 nd autoconfig managed-address-flag ····························································································· 164

ipv6 nd autoconfig other-flag ·················································································································· 165

ipv6 nd dad attempts ······························································································································ 166

ipv6 nd ip-unique learning enable ·········································································································· 166

ipv6 nd ns retrans-timer ························································································································· 167

ipv6 nd nud reachable-time ···················································································································· 168

ipv6 nd online-offline-log enable ············································································································ 168

ipv6 nd ra boot-file-url ···························································································································· 169

ipv6 nd ra dns search-list ······················································································································· 170

ipv6 nd ra dns search-list suppress········································································································ 171

ipv6 nd ra dns server ······························································································································ 172

ipv6 nd ra dns server suppress ·············································································································· 173

ipv6 nd ra halt ········································································································································· 174

iv

ipv6 nd ra hop-limit unspecified ·············································································································· 175

ipv6 nd ra interval ··································································································································· 175

ipv6 nd ra no-advlinkmtu ························································································································ 176

ipv6 nd ra prefix ······································································································································ 177

ipv6 nd ra prefix default ·························································································································· 178

ipv6 nd ra router-lifetime ························································································································ 179

ipv6 nd route-direct advertise ················································································································· 180

ipv6 nd route-direct advertise delay ······································································································· 180

ipv6 nd route-direct prefix convert-length ······························································································· 181

ipv6 nd router-preference ······················································································································· 182

ipv6 nd unsolicited-na-learning enable··································································································· 183

ipv6 nd user-ip-conflict record enable ···································································································· 184

ipv6 nd user-move record enable··········································································································· 185

ipv6 neighbor ·········································································································································· 185

ipv6 neighbor link-local minimize ··········································································································· 187

ipv6 neighbor stale-aging ······················································································································· 187

ipv6 neighbor timer stale-aging ·············································································································· 188

ipv6 neighbors max-learning-num ·········································································································· 189

local-proxy-nd enable ····························································································································· 189

proxy-nd enable ····································································································································· 190

proxy-nd span-segment enable·············································································································· 190

reset ipv6 nd ra prefix ····························································································································· 191

reset ipv6 neighbors ······························································································································· 192

DHCPv6 commands ·················································································· 193

Common DHCPv6 commands ······················································································································· 193

display ipv6 dhcp duid ···························································································································· 193

ipv6 dhcp advertise pd-route ·················································································································· 193

ipv6 dhcp dscp ······································································································································· 194

ipv6 dhcp select ····································································································································· 194

DHCPv6 relay agent commands ···················································································································· 195

display ipv6 dhcp relay client-information address················································································· 195

display ipv6 dhcp relay client-information pd ························································································· 197

display ipv6 dhcp relay drni-status ········································································································· 199

display ipv6 dhcp relay server-address ·································································································· 200

display ipv6 dhcp relay statistics ············································································································ 201

gateway-list ············································································································································ 203

ipv6 dhcp client-detect ··························································································································· 204

ipv6 dhcp relay client-information record ······························································································· 204

ipv6 dhcp relay client-link-address enable ····························································································· 205

ipv6 dhcp relay gateway ························································································································· 206

ipv6 dhcp relay interface-id ···················································································································· 206

ipv6 dhcp relay release-agent ················································································································ 207

ipv6 dhcp relay server-address ·············································································································· 208

ipv6 dhcp relay source-address ············································································································· 209

remote-server ········································································································································· 209

reset ipv6 dhcp relay client-information address ···················································································· 210

reset ipv6 dhcp relay client-information pd ····························································································· 211

reset ipv6 dhcp relay statistics ··············································································································· 212

DHCPv6 client commands ····························································································································· 212

display ipv6 dhcp client ·························································································································· 212

display ipv6 dhcp client statistics ··········································································································· 215

ipv6 address dhcp-alloc ························································································································· 216

ipv6 dhcp client dscp ······························································································································ 217

ipv6 dhcp client duid ······························································································································· 217

ipv6 dhcp client pd ································································································································· 218

ipv6 dhcp client stateful ·························································································································· 219

ipv6 dhcp client stateless enable ··········································································································· 220

reset ipv6 dhcp client statistics ··············································································································· 221

Document conventions and icons ······························································ 222

Conventions ··················································································································································· 222

v

Network topology icons ·································································································································· 223

Support and other resources ····································································· 224

Accessing Hewlett Packard Enterprise Support····························································································· 224

Accessing updates ········································································································································· 224

Websites ················································································································································ 225

Customer self repair ······························································································································· 225

Remote support ······································································································································ 225

Documentation feedback ······················································································································· 225

Index ·········································································································· 227

1

ARP commands

arp check log enable

Use arp check log enable to enable the ARP logging feature.

Use undo arp check log enable to disable the ARP logging feature.

Syntax

arp check log enable

undo arp check log enable

Default

ARP logging is disabled.

Views

System view

Predefined user roles

network-admin

Usage guidelines

This feature enables a device to log ARP events when ARP cannot resolve IP addresses correctly.

The log information helps administrators locate and solve problems. The device can log the following

ARP events:

•

On a proxy ARP-disabled interface, the target IP address of a received ARP packet is not the IP

address of the receiving interface.

•

The sender IP address of a received ARP reply conflicts with the IP address of the receiving

interface.

The device sends ARP log messages to the information center. You can use the info-center

source command to specify the log output rules for the information center. For more information

about information center, see System Management Configuration Guide.

The device can generate a large number of ARP logs. To conserve system resources, enable ARP

logging only when you are auditing or troubleshooting ARP events.

Examples

# Enable ARP logging.

<Sysname> system-view

[Sysname] arp check log enable

arp mac-interface-consistency check enable

Use arp mac-interface-consistency check enable to enable interface consistency

check between ARP and MAC address entries.

Use undo arp mac-interface-consistency check enable to disable interface

consistency check between ARP and MAC address entries.

Syntax

arp mac-interface-consistency check enable

undo arp mac-interface-consistency check enable

2

Default

Interface consistency check between ARP and MAC address entries is disabled.

Views

System view

Predefined user roles

network-admin

Usage guidelines

In an unstable network, the receiving interface for packets from a user might change. The interface in

the MAC address entry can be updated immediately while the interface in the ARP entry cannot. In

this case, the packets matching the ARP entry will be sent out of an incorrect interface. To solve this

problem, you can use this feature to periodically check the interface consistency between the ARP

and MAC address entry for a user. If the interfaces are not the same, ARP sends ARP requests in the

VLAN of the ARP entry and updates the entry with the ARP reply receiving interface.

Use the display mac-address command to display MAC address entries.

Examples

# Enable interface consistency check between ARP and MAC address entries.

<Sysname> system-view

[Sysname] arp mac-interface-consistency check enable

Related commands

display mac-address (Layer 2—LAN Switching Command Reference)

arp max-learning-num

Use arp max-learning-num to set the dynamic ARP learning limit for an interface.

Use undo arp max-learning-num to restore the default.

Syntax

arp max-learning-num max-number

undo arp max-learning-num

Default

An interface can learn a maximum of 163840 dynamic ARP entries.

Views

Layer 2 Ethernet interface view

Layer 2 aggregate interface view

Layer 3 Ethernet interface view

Layer 3 Ethernet subinterface view

Layer 3 aggregate interface view

Layer 3 aggregate subinterface view

VLAN interface view

Predefined user roles

network-admin

3

Parameters

max-number: Specifies the maximum number of dynamic ARP entries for an interface. The value

range for this argument is 0 to 163840.

Usage guidelines

An interface can dynamically learn ARP entries. To prevent an interface from holding too many ARP

entries, you can set the maximum number of dynamic ARP entries that the interface can learn. When

the maximum number is reached, the interface stops learning ARP entries.

When the number argument is set to 0, the interface is disabled from learning dynamic ARP entries.

Examples

# Specify VLAN-interface 40 to learn a maximum of 10 dynamic ARP entries.

<Sysname> system-view

[Sysname] interface vlan-interface 40

[Sysname-Vlan-interface40] arp max-learning-num 10

# Specify TwoHundredGigE 1/0/1 to learn a maximum of 10 dynamic ARP entries.

<Sysname> system-view

[Sysname] interface twohundredgige 1/0/1

[Sysname-TwoHundredGigE1/0/1] arp max-learning-num 10

# Specify Layer 2 aggregate interface Bridge-Aggregation 1 to learn a maximum of 10 dynamic ARP

entries.

<Sysname> system-view

[Sysname] interface bridge-aggregation 1

[Sysname-Bridge-Aggregation1] arp max-learning-num 10

# Specify Layer 3 aggregate interface Route-Aggregation 1 to learn a maximum of 10 dynamic ARP

entries.

<Sysname> system-view

[Sysname] interface route-aggregation 1

[Sysname-Route-Aggregation1] arp max-learning-num 10

arp max-learning-number

Use arp max-learning-number to set the dynamic ARP learning limit for a device.

Use undo arp max-learning-number to restore the default.

Syntax

arp max-learning-number max-number slot slot-number

undo arp max-learning-number slot slot-number

Default

The device can learn a maximum of 163840 dynamic ARP entries.

Views

System view

Predefined user roles

network-admin

Parameters

max-number: Specifies the maximum number of dynamic ARP entries for a device. The value

range for this argument is 0 to 163840.

4

slot slot-number: Specifies an IRF member device by its member ID.

Usage guidelines

A device can dynamically learn ARP entries. To prevent a device from holding too many ARP entries,

you can set the maximum number of dynamic ARP entries that the device can learn. When the

maximum number is reached, the device stops learning ARP entries.

When the number argument is set to 0, the device is disabled from learning dynamic ARP entries.

Examples

# Configure the device to learn a maximum of 64 dynamic ARP entries.

<Sysname> system-view

[Sysname] arp max-learning-number 64

arp mode uni

Use arp mode uni to configure a port as a customer-side port.

Use undo arp mode to restore the default.

Syntax

arp mode uni

undo arp mode

Default

A port operates as a network-side port.

Views

VLAN interface view

Predefined user roles

network-admin

Usage guidelines

By default, the device associates an ARP entry with routing information when the device learns an

ARP entry. The ARP entry provides the next hop information for routing. To save hardware resources,

you can use this command to specify a port that connects to a user terminal as a customer-side port.

The device will not associate the routing information with the learned ARP entries.

Examples

# Configure VLAN-interface 2 as a customer-side port.

<Sysname> system-view

[Sysname] interface vlan-interface 2

[Sysname-Vlan-interface2] arp mode uni

arp static

Use arp static to configure a static ARP entry.

Use undo arp to delete an ARP entry.

Syntax

arp static ip-address mac-address [ vlan-id interface-type

interface-number ] [ vpn-instance vpn-instance-name ]

undo arp ip-address [ vpn-instance-name ]

5

Default

No static ARP entries exist.

Views

System view

Predefined user roles

network-admin

Parameters

ip-address: Specifies an IP address for the static ARP entry.

mac-address: Specifies a MAC address for the static ARP entry, in the format of H-H-H.

vlan-id: Specifies the ID of a VLAN to which the static ARP entry belongs. The value range is 1 to

4094.

interface-type interface-number: Specifies an interface by its type and number.

vpn-instance vpn-instance-name: Specifies an MPLS L3VPN instance to which the static

ARP entry belongs. The vpn-instance-name argument represents the VPN instance name, a

case-sensitive string of 1 to 31 characters. The VPN instance must already exist. To specify a static

ARP entry on the public network, do not specify this option.

Usage guidelines

A static ARP entry is manually configured and maintained. It does not age out and cannot be

overwritten by any dynamic ARP entry.

Static ARP entries can be short or long.

A resolved short static ARP entry becomes unresolved upon certain events, for example, when the

resolved output interface goes down, or the corresponding VLAN or VLAN interface is deleted.

Long static ARP entries are effective or ineffective. Ineffective long static ARP entries cannot be

used for packet forwarding. A long static ARP entry is ineffective when any of the following conditions

exists:

•

The IP address in the entry conflicts with a local IP address.

•

No local interface has an IP address in the same subnet as the IP address in the ARP entry.

If you specify the vlan-id interface-type interface-number argument, follow these

restrictions and guidelines:

•

The interface can be an Ethernet interface or an aggregate interface.

•

The VLAN and VLAN interface must already exist. The specified Ethernet interface must belong

to the specified VLAN.

•

The IP address of the VLAN interface and the IP address specified by the ip-address

argument must be on the same network.

•

A long static ARP entry in a VLAN is deleted if the VLAN or VLAN interface is deleted.

Examples

# Configure a long static ARP entry that contains IP address 202.38.10.2, MAC address

00e0-fc01-0000, and output interface TwoHundredGigE 1/0/1 in VLAN 10.

<Sysname> system-view

[Sysname] arp static 202.38.10.2 00e0-fc01-0000 10 twohundredgige 1/0/1

Related commands

display arp

reset arp

6

arp timer aging

Use arp timer aging to set the aging timer for dynamic ARP entries.

Use undo arp timer aging to restore the default.

Syntax

arp timer aging { aging-minutes | second aging-seconds }

undo arp timer aging

Default

In system view, the aging timer for dynamic ARP entries is 20 minutes.

In interface view, the aging timer for dynamic ARP entries is the aging timer set in system view.

Views

System view

Layer 3 Ethernet interface view

Layer 3 Ethernet subinterface view

Layer 3 aggregate interface view

Layer 3 aggregate subinterface view

Layer 3 RPR logical interface view

VSI interface view

VLAN interface view

Predefined user roles

network-admin

Parameters

aging-minutes: Specifies the aging timer in minutes. The value range for this argument is 1 to

1440.

second aging-seconds: Specifies the aging timer in seconds. The value range for the

aging-seconds argument is 5 to 86400.

Usage guidelines

Each dynamic ARP entry in the ARP table has a limited lifetime, called an aging timer. The aging

timer of a dynamic ARP entry is reset each time the dynamic ARP entry is updated. Dynamic ARP

entries that are not updated before their aging timers expire are deleted from the ARP table.

You can set the aging timer for dynamic ARP entries in system view or in interface view. The aging

timer set in interface view takes precedence over the aging timer set in system view.

Set the aging timer for dynamic ARP entries as needed. For example, when you configure proxy ARP,

set a short aging time so that invalid dynamic ARP entries can be deleted in a timely manner.

Examples

# Set the aging timer for dynamic ARP entries to 10 minutes.

<Sysname> system-view

[Sysname] arp timer aging 10

# Set the aging timer for dynamic ARP entries to 200 seconds.

<Sysname> system-view

[Sysname] arp timer aging second 200

7

# Set the aging timer for dynamic ARP entries to 10 minutes on VLAN-interface 2.

<Sysname> system-view

[Sysname] interface vlan-interface 2

[Sysname-Vlan-interface2] arp timer aging 10

Related commands

display arp timer aging

arp timer aging probe-count

Use arp timer aging probe-count to set the maximum number of probes for dynamic ARP

entries.

Use undo arp timer aging probe-count to restore the default.

Syntax

arp timer aging probe-count count

undo arp timer aging probe-count

Default

In system view, the maximum number of probes for dynamic ARP entries is 3.

In interface view, the maximum number of probes for dynamic ARP entries is that set in system view.

Views

System view

Layer 3 Ethernet interface view

Layer 3 Ethernet subinterface view

Layer 3 aggregate interface view

Layer 3 aggregate subinterface view

VLAN interface view

Predefined user roles

network-admin

Parameters

count: Specifies the maximum number of probes. The value range for this argument is 0 to 10. To

disable the device from probing dynamic ARP entries, set the value to 0.

Usage guidelines

This probe mechanism keeps legal dynamic ARP entries valid and avoids unnecessary ARP

resolution in later traffic forwarding. This probe feature sends ARP requests for the IP address in a

dynamic ARP entry.

•

If the device receives an ARP reply before the entry aging timer expires, the device resets the

aging timer.

•

If the device does not receive any ARP reply after the maximum number of probes is made, the

device deletes the entry when the entry aging timer expires.

You can set the maximum number of probes in system view and in interface view. The setting in

interface view takes precedence over that in system view.

Examples

# Allow the device to perform a maximum of five probes for dynamic ARP entries.

<Sysname> system-view

8

[Sysname] arp timer aging probe-count 5

# Allow the device to perform a maximum of five probes for dynamic ARP entries on VLAN-interface

2.

<Sysname> system-view

[Sysname] interface vlan-interface 2

[Sysname-Vlan-interface2] arp timer aging probe-count 5

Related commands

arp timer aging

arp timer aging probe-interval

Use arp timer aging probe-interval to set the interval for probing dynamic ARP entries.

Use undo arp timer aging probe-interval to restore the default.

Syntax

arp timer aging probe-interval interval

undo arp timer aging probe-interval

Default

In system view, the probe interval is 5 seconds.

In interface view, the probe interval equals the setting in system view.

Views

System view

Layer 3 Ethernet interface view

Layer 3 Ethernet subinterface view

Layer 3 aggregate interface view

Layer 3 aggregate subinterface view

VLAN interface view

Predefined user roles

network-admin

Parameters

Interval: Specifies the probe interval in seconds. The value range is 1 to 60.

Usage guidelines

The probing feature keeps legal dynamic ARP entries valid and avoids unnecessary ARP resolution

during later traffic forwarding.

Before a dynamic ARP entry is aged out, the device sends ARP requests for the IP address in the

ARP entry.

•

If the device receives an ARP reply during the probe interval, the device resets the aging timer.

•

If the device does not receive any ARP reply during the probe interval, the device starts a new

probe.

•

If the maximum number probes are made, and still no ARP reply is received, the device deletes

the entry.

9

You can set the probe interval in system view and in interface view. The probe interval in interface

view takes precedence over the probe interval in system view.

Examples

# Set the probe interval to 10 seconds for dynamic ARP entries.

<Sysname> system-view

[Sysname] arp timer aging probe-interval 10

# Set the probe interval to 10 seconds for dynamic ARP entries on VLAN-interface 2.

<Sysname> system-view

[Sysname] interface vlan-interface 2

[Sysname-Vlan-interface2] arp timer aging probe-interval 10

Related commands

arp timer aging

arp timer aging probe-count

arp user-ip-conflict record enable

Use arp user-ip-conflict record enable to enable recording user IP address conflicts.

Use undo arp user-ip-conflict record enable to disable recording user IP address

conflicts.

Syntax

arp user-ip-conflict record enable

undo arp user-ip-conflict record enable

Default

Recording user IP address conflicts is disabled.

Views

System view

Predefined user roles

network-admin

Usage guidelines

This feature enables the device to detect and record user IP address conflicts. The device

determines that a conflict occurs if an incoming non-gratuitous ARP packet has the same sender IP

address as an existing ARP entry but a different sender MAC address. The device generates a user

IP address conflict record, logs the conflict, and sends the log to the information center. For

information about the log destination and output rule configuration, see the information center in

System Management Configuration Guide.

The device can generate a maximum of 10 user IP address conflict logs per second.

To display user IP address conflict records, use the display arp user-ip-conflict record

command.

Examples

# Enable recording user IP address conflicts.

<Sysname> system-view

[Sysname] arp user-ip-conflict record enable

10

Related commands

display arp user-ip-conflict record

arp user-move record enable

Use user-move record enable to enable recording user port migrations.

Use undo arp user-move record enable to disable recording user port migrations.

Syntax

arp user-move record enable

undo arp user-move record enable

Default

Recording user port migrations is disabled.

Views

System view

Predefined user roles

network-admin

Usage guidelines

The device can generate a maximum of 10 user port migration logs per second.

To display user port migration records, use the display arp user-move record command.

Examples

# Enable recording user port migration.

<Sysname> system-view

[Sysname] arp user-move record enable

Related commands

display arp user-move record

display arp

Use display arp to display ARP entries.

Syntax

display arp [ [ all | dynamic | static ] [ slot slot-number ] | vlan vlan-id |

interface interface-type interface-number ] [ count | verbose ]

Views

Any view

Predefined user roles

network-admin

network-operator

Parameters

all: Displays all ARP entries.

dynamic: Displays dynamic ARP entries.

11

static: Displays static ARP entries.

slot slot-number: Specifies an IRF member device by its member ID. If you do not specify a

member device, this command displays ARP entries for the master device.

vlan vlan-id: Specifies a VLAN by its VLAN ID. The VLAN ID is in the range of 1 to 4094.

interface interface-type interface-number: Specifies an interface by its type and

number. If you do not specify an interface, this command displays ARP entries for all interfaces.

count: Displays the number of ARP entries.

verbose: Displays detailed information about ARP entries.

Usage guidelines

This command displays information about static and dynamic ARP entries, including the IP address,

MAC address, VLAN ID, output interface, entry type, and aging timer.

Examples

# Display all ARP entries.

<Sysname> display arp all

Type: S-Static D-Dynamic O-Openflow R-Rule I-Invalid

IP address MAC address VLAN/VSI name Interface Aging Type

1.1.1.1 02e0-f102-0023 1 200GE1/0/1 -- S

1.1.1.2 00e0-fc00-0001 12 200GE1/0/2 960 D

# Display detailed information about all ARP entries.

<Sysname> display arp all verbose

Type: S-Static D-Dynamic O-Openflow R-Rule I-Invalid

IP address : 1.1.1.1 MAC address : 02e0-f102-0023

Type : Static Aging : --

Interface : 200GE1/0/1 SVLAN/CVLAN : 1/--

VPN instance : --

Link ID : --

Service instance : --

VXLAN ID : --

VSI name : --

VSI interface : --

IP address : 1.1.1.2 MAC address : 00e0-fc00-0001

Type : Dynamic Aging : 960 seconds

Interface : 200GE1/0/2 SVLAN/CVLAN : 12/--

VPN instance : --

Link ID : --

Service instance : --

VXLAN ID : --

VSI name : --

VSI interface : --

# Display the number of all ARP entries.

<Sysname> display arp all count

Total number of entries : 3

12

Table 1 Command output

Field

Description

IP address IP address in an ARP entry.

MAC address MAC address in an ARP entry.

VLAN/VSI name

ID of the VLAN to which an ARP entry belongs. This field displays hyphens (--)

in either of the following situations:

• The ARP entry is an unresolved short static ARP entry.

• The output interface of the ARP entry does not belong to any SVLAN.

Interface Output interface in an ARP entry. This field displays hyphens (--) if the ARP

entry is an unresolved short static ARP entry.

Aging

Aging time for an ARP entry, in seconds.

• For a static ARP entry, this field always displays hyphens (--). The static

ARP entry never ages out unless you delete it manually.

• For a dynamic ARP entry, this field displays hyphens (--) if the aging time

is unknown.

Type

ARP entry type:

• D—Dynamic.

• S—Static.

• O—OpenFlow. This value is not supported in the current software

version.

• R—Rule. This value is not supported in the current software version.

•

I

—Invalid.

SVLAN/CVLAN

ID of the SVLAN or CVLAN to which the ARP entry belongs. This field displays

hyphens (--) in either of the following situations:

• The ARP entry is an unresolved short static ARP entry.

• The output interface of the ARP entry does not belong to any SVLAN or

CVLAN.

VPN instance Name of VPN instance. This field displays hyphens (--) if no VPN instance is

configured for the ARP entry.

Link ID This field is not supported in the current software version.

Link ID in an ARP entry. This field displays hyphens (--) if the ARP entry does

not belong to any VSI.

Service instance

This field is not supported in the current software version.

Ethernet service instance in an ARP entry. This field displays hyphens (--) if no

Ethernet service instance is specified for the Layer 2 Ethernet interface or

Layer 2 aggregate interface in the ARP entry.

VXLAN ID This field is not supported in the current software version.

VXLAN ID (also called VNI). This field displays hyphens (--) if the ARP entry

does not belong to any VXLAN.

VSI name This field is not supported in the current software version.

Name of the VSI to which the ARP entry belongs. This field displays hyphens

(--) if the ARP entry does not belong to a specific VSI.

VSI interface This field is not supported in the current software version.

VSI interface specified for the VSI. This field displays hyphens (--) if no VSI

interface is specified for the VSI.

Total number of entries Number of ARP entries.

13

Related commands

arp static

reset arp

display arp entry-limit

Use display arp entry-limit to display the maximum number of ARP entries that a device

supports.

Syntax

display arp entry-limit

Views

Any view

Predefined user roles

network-admin

network-operator

Examples

# Display the maximum number of ARP entries that the device supports.

<Sysname> display arp entry-limit

ARP entries: 163840

display arp ip-address

Use display arp ip-address to display the ARP entry for an IP address.

Syntax

display arp ip-address [ slot slot-number ] [ verbose ]

Views

Any view

Predefined user roles

network-admin

network-operator

Parameters

ip-address: Displays the ARP entry for the specified IP address.

slot slot-number: Specifies an IRF member device by its member ID. If you do not specify a

member device, this command displays information for the master device.

verbose: Displays the detailed information about the specified ARP entry.

Usage guidelines

The ARP entry information includes the IP address, MAC address, VLAN ID, output interface, entry

type, and aging timer.

Examples

# Display the ARP entry for the IP address 20.1.1.1.

<Sysname> display arp 20.1.1.1

Type: S-Static D-Dynamic O-Openflow R-Rule I-Invalid

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