Hello all! I have a question re: the 'spanning-tree extend system-id' command.
I want to use VLANs above 2000... I'm currently building the framework for a fully L3 environment and I've provisioned nearly all VLANs from 1-1000 already. I'd like to stick with my current numbering/naming convention and that forces me to use VLANs above 1000.
OK, with all that being said, I (foolishly) ran the 'spanning-tree extend system-id' command on my core switch... BLAM. STP busted, network down. Thankfully, after-hours. Fixed that...
My environment is as follows... 2 6509 core switches, 2 6509 Server Farm switches. Each running a recent IOS version. I have L3 links (and L2 trunks for GLBP) between my core and server farm. I'm running Rapid PVST.
I currently have L2 trunks between my core switches and distribution (3508Gs). My distribution connect to a variety of access switches (3500XL and 2900XL plus some CatOS 2948Gs).
So... can I actually use the extended system-id command without blowing up my network? My old 2900XL and 3500XLs don't support 'spanning-tree extend system-id'.
Am I stuck?