On Fri, 2009-01-30 at 19:14 +0100, Garry wrote: > OK, core setup consists of two 4507 SupV-10GE, connected through the > TenG interfaces in a REP ring. Works fine so far. > Connected to those two switches (let's say c1 & c2) are four ME3400 > switches, all of which going through their GigE ports as a 2G > etherchannel (with LACP). Ports are configured as trunks. The other > ports on the ME3400 will be used for a MAN application, interconnecting > customer sites via QinQ. ... > But then I noticed that one of the switches had both its uplink port > disabled. shut/no shut resulted in them being re-disabled due to > "misconfigured channels". As I couldn't find any difference (or fault) > in the switch's configuration, I rebooted it, which resulted in both > uplinks being active again - only to see the uplink ports on yet another > switch going down, with the same error message.
Just guessing, but maybe an LACP etherchannel and L2 protocol tunnelling are incompatible. Could you try this with "mode on" (forced) etherchannels? Is it an "err-disable" or something LACP does or something third? Regards, Peter _______________________________________________ cisco-nsp mailing list [email protected] https://puck.nether.net/mailman/listinfo/cisco-nsp archive at http://puck.nether.net/pipermail/cisco-nsp/
