Yesterday I experienced a different behavior in a special case. If you put a port to a VLAN that doesn't exist and the switch is a VTP client, the VLAN is not created (being VTP client), the port is put into that VLAN and no error/log message is generated.
Experienced on a 2950 w/ 12.1(22)EA13 enhanced image. Martin On 8/20/2010 5:17 PM, Farzad A. Cheema wrote: > If you assign a port to a VLAN that doesn’t exist, the switch takes the > commands, creates that vlan and put the port in that vlan. > > > > > Cheers, > > Farzad > > > On 20 August 2010 02:47, marc abel <[email protected]> wrote: > >> I had made a typo configuring one of my switches and assigned an access >> port to a vlan that didn't exist on the switch. While trying to troubleshoot >> why I had no connectivity I noticed I had a one way CDP relationship. In >> other words I could see the router from the switch, but the router didn't >> see a cdp neighbor on the interface. Once I put the switchport in the right >> vlan I could see the switch. >> >> Could anyone explain why this happens? It might help me understand CDP >> better. >> >> Thank you, >> >> Marc >> >> _______________________________________________ >> For more information regarding industry leading CCIE Lab training, please >> visit www.ipexpert.com >> >> > > > > > _______________________________________________ > For more information regarding industry leading CCIE Lab training, please > visit www.ipexpert.com _______________________________________________ For more information regarding industry leading CCIE Lab training, please visit www.ipexpert.com
