> I have Catalyst 3560 and 2960 switches connected by a two member > Etherchannel trunk using built in copper GE interfaces. For some reason > Ethernet autonegotiation ends up assigning unmatching speeds for one link > (10M in one switch, 100M in other) and the interfaces end up in suspended > state. > > MGMT-14#show int status | inc 35|36 > Gi0/35 connected trunk a-full a-1000 > 10/100/1000BaseTX > Gi0/36 suspended trunk a-full a-100 > 10/100/1000BaseTX > > MGMT-13#show int status | inc 23|24 > Gi0/23 connected trunk a-full a-1000 > 10/100/1000BaseTX > Gi0/24 suspended trunk a-full a-10 > 10/100/1000BaseTX > > Any ideas what might be causing this. I wonder if I'm running into some kind > of minimum cable length problem. Switches are sitting adjacent to each other > in a rack and connected with very short cables (0.5m ~ 2 ft).
There is *no* minimum cable length requirement for 1000baseT. I would start by replacing the cable connecting the two suspended ports. Steinar Haug, Nethelp consulting, [email protected] _______________________________________________ cisco-nsp mailing list [email protected] https://puck.nether.net/mailman/listinfo/cisco-nsp archive at http://puck.nether.net/pipermail/cisco-nsp/
