Administering And Monitoring The Vmps; Troubleshooting Dynamic Port Vlan Membership; Dynamic Port Vlan Membership Configuration Example - Cisco Catalyst 2950 Software Manual

How the VMPS Works

Administering and Monitoring the VMPS

You can display information about the VMPS by using the privileged EXEC show vmps command. The
switch displays the this information about the VMPS:
VMPS VQP Version The version of VQP used to communicate with the VMPS. The switch queries
Reconfirm Interval
Server Retry Count
VMPS domain server The IP address of the configured VLAN membership policy servers. The switch
VMPS Action

Troubleshooting Dynamic Port VLAN Membership

The VMPS shuts down a dynamic port under these conditions:
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To reenable a shut-down dynamic port, enter the interface configuration no shutdown command.

Dynamic Port VLAN Membership Configuration Example

Figure 8-6
In this example, these assumptions apply:
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the VMPS that is using VQP version 1.
The number of minutes the switch waits before reconfirming the
VLAN-to-MAC-address assignments.
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.
sends queries to the one marked current. The one marked primary is the primary
server.
The result of the most recent reconfirmation attempt. The reconfirmation
attempt can happen automatically when the reconfirmation interval expired, or
you can force it by entering the privileged EXEC vmps reconfirm command or
its Cluster Management Suite or SNMP equivalent.
The VMPS is in secure mode, and it will 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 port.
shows a network with a VMPS server switch and VMPS client switches with dynamic ports.
The VMPS server and the VMPS client are separate switches.
The Catalyst 5000 series Switch 1 is the primary VMPS server.
The Catalyst 5000 series Switch 3 and Switch 10 are secondary VMPS servers.
The end stations are connected to these clients:
– Catalyst 2950 Switch 2
– Catalyst 3500 XL Switch 9
The database configuration file is called Bldg-G.db and is stored on the TFTP server with the IP
address 172.20.22.7.
Chapter 8 Configuring VLANs
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