Hi, I have been alerted, by Ciscoworks LMS, that I have multiple spanning-tree root devices on my network. I have configured one of our 6509s (CatOS) to be root for all devices and the priority was ato set to 8192. However I have 8 devices that are reporting being roots for all but the default (vlan 1) vlan. I've checked their priorities and hey are predominantly set at 61443 or at least a lot higher than 8192. They are different models of devices, 2950, 3750 etc and I have upgraded them to the latest IOS and rebooted all with no change. All devices running either PVST or PVST+. Anybody have any ideas?
Check to ensure that the VLANs in question exist in all devices from the access device with the incorrect root all the way back to the actual root 6509. If each instance of spanning tree can't talk directly to the root, it will elect a root from among the instances that it can communicate with.