We are a Cisco shop with a couple dummy switches all over campus. Today a 12-port dummy switch went down, and was replaced with a 24 D-link smart switch. The D-link replaced (2) 12 port dummy switches, when the d-link got plugged in both uplinks were plugged into the device... I believe causing a network/bridge loop?
After I got there and realized what happened I powered down the switch and disabled the 2 uplink ports on the Cisco box. However, its been hours later and the network is still acting poorly... like there still is a network loop.
The 6509 chasis is set as the primary root on all vlans. So i don't think STP would have re converged.
I've started to go thru the switches with cdp neighbor cmds and verify there are no loops still.
Is there anything else I should be doing? testing? troubleshooting? Kinda clueless atm...