Cisco Systems 3750E Monitoring the Vmps, Troubleshooting Dynamic-Access Port Vlan Membership

Chapter 13 Configuring VLANs

Configuring VMPS

Monitoring the VMPS

You can display information about the VMPS by using the show vmps privileged EXEC command. The switch displays this information about the VMPS:

•VMPS VQP Version—the version of VQP used to communicate with the VMPS. The switch queries the VMPS that is using VQP Version 1.

•Reconfirm Interval—the number of minutes the switch waits before reconfirming the VLAN-to-MAC-address assignments.

•Server Retry Count—the number of times VQP resends a query to the VMPS. If no response is received after this many tries, the switch starts to query the secondary VMPS.

•VMPS domain server—the IP address of the configured VLAN membership policy servers. The switch sends queries to the one marked current. The one marked primary is the primary server.

•VMPS Action—the result of the most recent reconfirmation attempt. A reconfirmation attempt can occur automatically when the reconfirmation interval expires, or you can force it by entering the vmps reconfirm privileged EXEC command or its Network Assistant or SNMP equivalent.

This is an example of output for the show vmps privileged EXEC command:

Switch# show vmps

VQP Client Status:

--------------------

VMPS VQP Version: 1

Reconfirm Interval: 60 min

Server Retry Count: 3

VMPS domain server: 172.20.128.86 (primary, current)

172.20.128.87

Reconfirmation status
---------------------
VMPS Action:	other

Troubleshooting Dynamic-Access Port VLAN Membership

The VMPS shuts down a dynamic-access port under these conditions:

•The VMPS is in secure mode, and it does not allow the host to connect to the port. The VMPS shuts down the port to prevent the host from connecting to the network.

•More than 20 active hosts reside on a dynamic-access port.

To re-enable a disabled dynamic-access port, enter the shutdown interface configuration command followed by the no shutdown interface configuration command.

VMPS Configuration Example

Figure 13-5shows a network with a VMPS server switch and VMPS client switches with dynamic-access ports. In this example, these assumptions apply:

•The VMPS server and the VMPS client are separate switches.

•The Catalyst 6500 series Switch A is the primary VMPS server.

•The Catalyst 6500 series Switch C and Switch J are secondary VMPS servers.

	Catalyst 3750-E and 3560-E Switch Software Configuration Guide
OL-9775-02		13-33