cisco vlan shutdown
Posted on 2004-04-30
I apologize that this post is a little sketchy. I thought I was doing something simple, but have a strange outcome, and little time to correct it.
I work at a large residential facility associated with a major university. Presently, we have seven subnets serving our residents.
We will be setting up a test environment tomorrow to evaluate a third party access control system.
To simulate our network, I pulled an under-utilized 2900XL switch from out production environment. This switch had Vlan1 disabled, and Vlan2 as the management Vlan. No trunking involved.
I shutdown Vlan2, and created Vlans 3-9 and assigned two ports to each Vlan. The remaining ports are still assigned to the shutdown Vlan2.
The #sh vlan command reveals that Vlans 3-9 are active and the correct ports are assigned.
However, #sh run indicates that all but one vlans are shutdown. I tried no shutdown on each, but there was no change. I then shutdown the active Vlan (Vlan 3) ran a no shutdown command on Vlan 4, and it was up.
So, there's something going on here that is allowing only one Vlan at a time to be up.
Wiping the entire config is an option, but if there is some obvious (but not to me) fix, it would help me out by saving time.