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Catalyst 2960 and 2960-S Switch Software Configuration Guide
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Chapter 13 Configuring VLANs
Configuring VMPS
Beginning in privileged EXEC mode, follow these steps to configure the network shown in Figure 13-3:
Configuring VMPS
The VLAN Query Protocol (VQP) is used to support dynamic-access ports, which are not pe rmanently
assigned to a VLAN, but give VLAN assignments based on the MAC source addresses seen on the port.
Each time an unknown MAC address is seen, the switch sends a VQP query to a remote VMPS; the query
includes the newly seen MAC address and the port on which it was seen. The VMPS responds with a
VLAN assignment for the port. The switch cannot be a VMPS server but can act as a client to the VMPS
and communicate with it through VQP.
These sections contain this information:
• “Understanding VMPS” section on page 13-23
• “Default VMPS Client Configuration” section on page 13-24
• “VMPS Configuration Guidelines” section on page 13-24
• “Configuring the VMPS Client” section on page 13-25
• “Monitoring the VMPS” section on page 13-27
Command Purpose
Step 1 configure terminal Enter global configuration mode on Switch A.
Step 2 interface interface-id_1 Define the interface to be configured as a trunk, and enter interface
configuration mode.
Step 3 switchport mode trunk Configure the port as a trunk port.
Step 4 exit Return to global configuration mode.
Step 5 Repeat Steps 2 through 4 on a second interface in the Switch A stack.
Step 6 end Return to privileged EXEC mode.
Step 7 show running-config Verify your entries. In the display, make sure that the interfaces are
configured as trunk ports.
Step 8 show vlan When the trunk links come up, Switch A receives the VTP information
from the other switches. Verify that Switch A has learned the VLAN
configuration.
Step 9 configure terminal Enter global configuration mode.
Step 10 interface interface-id_1 Define the interface on which to set the STP cost, and enter interface
configuration mode.
Step 11 spanning-tree vlan 2-4 cost 30 Set the spanning-tree path cost to 30 for VLANs 2 through 4.
Step 12 end Return to global configuration mode.
Step 13 Repeat Steps 9 through 12 on the other configured trunk interface on
Switch A, and set the spanning-tree path cost to 30 for VLANs 8, 9, and
10.
Step 14 exit Return to privileged EXEC mode.
Step 15 show running-config Verify your entries. In the display, verify that the path costs are set
correctly for both trunk interfaces.
Step 16 copy running-config startup-config (Optional) Save your entries in the configuration file.