Several times in the past few months (at totally different sites/switches), I've run into problems where an AE would not come up running LACP. I usually setup both sides to be LACP-active.
Digging deeper, the AE interface shows down. When I do "show int AEx extensive", ethernet link on the physical interfaces show up. But when I scroll down further and look at the LACP tx and rx packets, usually one side is receiving, but not transmitting LACP frames. In LACP active mode, both sides should transmit/initiate LACP packets, correct?
Things I've tried:
-deleting/readding the AE (never seems to work)
-capturing LACP packets on the intefaces (IIRC, one side truly wasn't transmitting LACP packets indicating a problem)
-removing LACP and just using static link aggregation (always works)
-restarting the ethernet-switching process (only tried this once, but didn't work and caused weirder issues)
-rebooted the entire switch (seems to work)
Has anybody seen this? Is it a bug? I'm almost always running the recommended version of software on the switch.