Switchport dies after host drops and comes back online
We are running a 4507R SupII+ switch with WS-X4548-GB host modules. After a host reloads and comes back online, the switchport dies. Attempting to shut/no shut the port, the following message is logged:
Aug 15 15:32:14.164 UTC: %C4K_SWITCHMANAGER-4-S2WERRORREPORT: PimEthAutoNeg: S2w Read/Write Error for port Gi4/25.
This happens on all switchports within this module only. The only way to recover the port is to disable inline power with the power inline never command. I have searched for a bug in this version 12.2(25)EWA4 relating to this and have found nothing.
Re: Switchport dies after host drops and comes back online
I've had a similiar situation but ports were connected to routers. Mine is also 4507R w/ Sup V 10GE with WS-X4548-GB. The only way the ports would come back up was to set the speed to 100.
I came to a conclusion that since CAT-5 cable pin outs are different for 1000 and 10/100 (1000 also uses pins 4578) it couldn't auto negotiate thus the port remained down until I configured the port speed to 100.
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