Reconfirming Vlan Memberships; Changing The Reconfirmation Interval - Cisco 2950 - Catalyst Switch Configuration Manual

Chapter 17 Configuring VLANs
Command
Step 4 switchport access vlan dynamic
Step 5
end
Step 6 show interfaces interface-id switchport
Step 7 copy running-config startup-config
To return an interface to its default configuration, use the default interface interface-id interface
configuration command. To return an interface to its default switchport mode (dynamic desirable), use
the no switchport mode interface configuration command. To reset the access mode to the default
VLAN for the switch, use the no switchport access interface configuration command.
Note When you configure a dynamic access port by using the switchport access vlan dynamic interface
configuration command, the port might allow unauthorized users to access network resources if the
interface changes from access mode to trunk mode through the DTP negotiation. The workaround is to
configure the port as a static access port.

Reconfirming VLAN Memberships

Beginning in privileged EXEC mode, follow these steps to confirm the dynamic port VLAN membership
assignments that the switch has received from the VMPS:
Command
Step 1
vmps reconfirm
Step 2
show vmps

Changing the Reconfirmation Interval

VMPS clients periodically reconfirm the VLAN membership information received from the VMPS. You
can set the number of minutes after which reconfirmation occurs.
If you are configuring a member switch in a cluster, this parameter must be equal to or greater than the
reconfirmation setting on the command switch. You must also first use the rcommand privileged EXEC
command to log into the member switch.
Beginning in privileged EXEC mode, follow these steps to change the reconfirmation interval:
Command
Step 1 configure terminal
Step 2
vmps reconfirm minutes
Step 3 end
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Purpose
Configure the port as eligible for dynamic VLAN membership.
The dynamic access port must be connected to an end station.
Return to privileged EXEC mode.
Verify your entries in the Operational Mode field of the display.
(Optional) Save your entries in the configuration file.
Purpose
Reconfirm dynamic port VLAN membership.
Verify the dynamic VLAN reconfirmation status.
Purpose
Enter global configuration mode.
Enter the number of minutes between reconfirmations of the dynamic
VLAN membership.
Enter a number from 1 to 120. The default is 60 minutes.
Return to privileged EXEC mode.
Catalyst 2950 and Catalyst 2955 Switch Software Configuration Guide
Configuring VMPS
17-29