Cisco Systems 3560 Manual De Usuario

The VLAN Query Protocol (VQP) is used to support dynamic-access ports, which are not permanently 
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:

 

{isl | dot1q | negotiate}

Configure the port to support ISL or IEEE 802.1Q encapsulation. You 
must configure each end of the link with the same encapsulation type.

Configure the port as a trunk port. The trunk defaults to ISL trunking.

Return to global configuration mode.

Repeat Steps 2 through 5 on a second interface in Switch A.

Return to privileged EXEC mode.

Verify your entries. In the display, make sure that the interfaces are 
configured as trunk ports.

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.

Enter global configuration mode.

Define the interface on which to set the STP cost, and enter interface 
configuration mode.

Set the spanning-tree path cost to 30 for VLANs 2 through 4.

Return to global configuration mode.

Repeat Steps 9 through 13 on the other configured trunk interface on 
Switch A, and set the spanning-tree path cost to 30 for VLANs 8, 9, and 
10.

Return to privileged EXEC mode.

Verify your entries. In the display, verify that the path costs are set 
correctly for both trunk interfaces.

(Optional) Save your entries in the configuration file.