Contents
4
Chapter 6: Port Mirroring ..............................................................................................................................65
Port Mirroring Overview ....................................................................................................................................66
Configuring Port Mirroring .................................................................................................................................67
Disabling Port Mirroring ....................................................................................................................................69
Chapter 7: Virtual LANs .................................................................................................................................71
VLAN Features ................................................................................................................................................. 72
Increased Performance .............................................................................................................................. 72
Improved Manageability ............................................................................................................................. 72
Increased Security...................................................................................................................................... 72
Types of VLANs..........................................................................................................................................73
Port-based VLAN Overview ..............................................................................................................................74
VLAN Name................................................................................................................................................74
VLAN Identifier ........................................................................................................................................... 74
Untagged Ports...........................................................................................................................................75
Port VLAN Identifier.................................................................................................................................... 75
Guidelines to Creating a Port-based VLAN ................................................................................................75
Drawbacks of Port-based VLANs ...............................................................................................................76
Port-based Example 1 ................................................................................................................................77
Port-based Example 2 ................................................................................................................................78
Tagged VLAN Overview ...................................................................................................................................80
Tagged and Untagged Ports ......................................................................................................................81
Port VLAN Identifier.................................................................................................................................... 81
Guidelines to Creating a Tagged VLAN ..................................................................................................... 81
Tagged VLAN Example ..............................................................................................................................82
Creating a VLAN ...............................................................................................................................................84
Configuring the PVID of Untagged Ports ..........................................................................................................87
Displaying the VLANs ....................................................................................................................................... 89
Modifying a VLAN ............................................................................................................................................. 91
Deleting a VLAN ...............................................................................................................................................93
Chapter 8: Quality of Service (QoS) .............................................................................................................95
QoS Overview ...................................................................................................................................................96
Mapping CoS Priorities to Egress Queues .......................................................................................................99
Configuring CoS..............................................................................................................................................102
Chapter 9: Rapid Spanning Tree Protocol (RSTP) ....................................................................................107
RSTP Overview ..............................................................................................................................................108
Bridge Priority and the Root Bridge .......................................................................................................... 108
Designated Bridge and Designated Port............................................................................................109
Path Costs and Port Costs.................................................................................................................109
Port Priority ........................................................................................................................................110
Hello Time and Bridge Protocol Data Units (BPDUs) ........................................................................111
Point-to-Point and Edge Ports............................................................................................................111
Mixed STP and RSTP Networks ..............................................................................................................113
Rapid Spanning Tree and VLANs ............................................................................................................114
Enabling or Disabling RSTP ...........................................................................................................................115
Configuring the RSTP Bridge Settings............................................................................................................118
Configuring STP Compatibility ........................................................................................................................120
Configuring RSTP Port Settings .................................................................................................
....................121
Configuring the Basic RSTP Port Settings ............................................................................................... 121
Configuring the Advanced RSTP Port Settings ........................................................................................123
Displaying the RSTP Topology ....................................................................................................................... 126
Chapter 10: 802.1x Port-based Network Access Control .........................................................................129
802.1x Port-based Network Access Control Overview ................................................................................... 130
Authentication Process.............................................................................................................................131