Configuring Vmps - Cisco WS-C3750-48PS-S Software Configuration Manual

Chapter 13 Configuring VLANs
Beginning in privileged EXEC mode, follow these steps to configure the network shown in
Command
Step 1 configure terminal
Step 2 interface gigabitethernet1/0/1
Step 3
switchport trunk encapsulation
{isl | dot1q | negotiate}
Step 4 switchport mode trunk
Step 5 exit
Step 6
Step 7
end
Step 8 show running-config
Step 9 show vlan
Step 10 configure terminal
Step 11
interface gigabitethernet1/0/1
Step 12
spanning-tree vlan 2-4 cost 30
Step 13 end
Step 14
Step 15 exit
Step 16
show running-config
Step 17
copy running-config startup-config

Configuring VMPS

The VLAN Query Protocol (VQP) is used to support dynamic-access ports, which are not permanently
assigned to a VLAN, but given 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.
This section includes this information about configuring VMPS:
•
•
78-16180-02
"Understanding VMPS" section on page 13-28
"Default VMPS Client Configuration" section on page 13-29
Purpose
Enter global configuration mode on Switch A.
Enter interface configuration mode, and define the interface to be
configured as a trunk.
Configure the port to support ISL or 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 4 on a second interface in the Switch A stack.
Return to privileged EXEC mode.
Verify your entries. In the display, make sure that the interfaces
configures in Steps 2 and 6 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.
Enter interface configuration mode, and define the interface on which
to set the STP cost.
Set the spanning-tree path cost to 30 for VLANs 2 through 4.
Return to global configuration mode.
Repeat Steps 9 through 11 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.
Catalyst 3750 Switch Software Configuration Guide
Configuring VMPS
Figure 13-4:
13-27