Just curious if anyone has seen an issue like this:
Three times in the week different 4500's in different buildings have had BOTH uplinks to their cores disabled due to UDLD and/or Loop Guard. Manually re-enabling the ports has brought them back fine and none has had any further issues. A physical and logical inspection shows no basis for any of the incidents:
- No ports going up/down any time around the time the incidents happened
- No physical anomolies
- No switches added or unauthorized switches found in the vlans (the switches do not share any vlans)
- BPDUGuard has not kicked (all access ports have BPDUguard enabled)
I'm stumped at this point. I have gone YEARS without these kinds of issues and getting 3 in a week with no reason behind them makes me suspicious.
The access switches are 4510R with Dual SupV (one uplink per sup) running 12.2(50)SG4 and cores are 6509 with dual Sup720 running 12.2(33)SXI3
Thanks!
