Had a strange issue today where all devices sitting off one of the WS-X6748-GE-TX linecards in a 6509 chassis had intermittent connectivity to them.
A reseat of the linecard resolved the issue.
What I want to know is what could have caused this? Has anyone else had this issue?
We could not see anything in logs, error counters, etc to indicate an issue.
The linecard itself has a Distributed Forwarding Card on it(WS-F6700-DFC3B).
I'm thinking that the L3 fwding tables got themselves into a mess and only way to cure was to effectively "reboot" the linecard.