Cisco Systems 3750E Monitoring the VMPS, Troubleshooting Dynamic-Access Port VLAN Membership, VMPS Configuration Example

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Catalyst 3750-E and 3560-E Switch Software Configuration Guide
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Chapter13 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 sw itch waits before reconfirming the
VLAN-to-MAC-address assignments.
•Server Retry Count—the number of times VQP resends a query to the V MPS. 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 13-5 shows 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.