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Catalyst2950 and Catalyst2955 Switch Software Configuration Guide
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Chapter17 Configuring VLANs Configuring VMPS
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 ac cess net work r eso urce s if th e
interface changes from access mode to trunk mode through the DTP negotiation. The wo rkaro und 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:
Changing the Reconfirmation Interval
VMPS clients periodically reconfirm the VLAN membership informat ion rec ei ve d from th e VMPS. You
can set the number of minutes after which reconfirmation occ ur s.
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 m ust also f irst us e the rcommand privileged EXEC
command to log into the member switch.
Beginning in privileged EXEC mode, follow these steps to change the reconfirmation interval:
Step4 switchport access vlan dynamic Configure the port as eligible for dynamic VLAN membership.
The dynamic access port must be connected to an end station.
Step5 end Return to privileged EXEC mode.
Step6 show interfaces interface-id switchport Verify your entries in the Operational Mode field of the display.
Step7 copy running-config startup-config (Optional) Save your entries in the configuration file.
Command Purpose
Command Purpose
Step1 vmps reconfirm Reconfirm dynamic port VLAN membership.
Step2 show vmps Verify the dynamic VLAN reconfirmation status.
Command Purpose
Step1 configure terminal Enter global configuration mode.
Step2 vmps reconfirm minutes Enter the number of minutes between reconfirmations of the dynamic
VLAN membership.
Enter a number from 1 to 120. The default is 60 min utes .
Step3 end Return to privileged EXEC mode.