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