Contents
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Catalyst 3550 Multilayer Switch Software Configuration Guide
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802.1Q Configuration Considerations 9-24
Default Layer 2 Ethernet Interface VLAN Configuratio n 9-24
Configuring an Ethernet Interface as a Trunk Port 9-25
Configuring a Trunk Port 9-25
Defining the Allowed VLANs on a Trunk 9-27
Changing the Pruning-Eligible List 9-28
Configuring the Native VLAN for Untagged Traffic 9-29
Load Sharing Using STP 9-29
Load Sharing Using STP Port Priorities 9-30
Configuring STP Port Priorities and Load Sharing 9-30
Load Sharing Using STP Path Cost 9-32
Configuring STP Path Costs and Load Sharing 9-32
Understanding VMPS 9-33
Dynamic Port VLAN Membership 9-34
VMPS Database Configuration File 9-34
VMPS Configuration Guidelines 9-36
Default VMPS Configuration 9-37
Configuring an Interface as a Layer 2 Dynamic Access Port 9-37
Entering the IP Address of the VMPS 9-37
Configuring Dynamic Access Ports on VMPS Clients 9-38
Reconfirming VLAN Memberships 9-39
Changing the Reconfirmation Interval 9-39
Changing the Retry Count 9-39
Administering and Monitoring the VMPS 9-40
Troubleshooting Dynamic Port VLAN Membership 9-40
Dynamic Port VLAN Membership Configuration Example 9-40
CHAPTER
10 Configuring STP 10-1
Understanding Basic STP Features 10-1
Supported STP Instances 10-2
STP Overview 10-2
Bridge ID, Switch Priority, and Extended System ID 10-3
Election of the Root Switch 10-3
Bridge Protocol Data Units 10-4
STP Timers 10-5
Creating the STP Topology 10-5
STP Interface States 10-6
Blocking State 10-7
Listening State 10-7