Hi I have a 6500 (redundant) with 10 3750 singles and 4 stacks of two all configured with 2gb etherchannels across two line cards. If I disable card 4, thus bringing every channel down to one gig it all works peachy. When I enable the 2nd card it all goes horribly wrong.
On a bare bones config I have only two vlans created, the vtp mode as transparent, etherchannel mode on, trunking as dot1q on. I leave it like this for a few minutes and my end to end starts to crumble with no emor messages and all port lights blazing away, I disconnect or shut down one of my line cards and it all comes back
It must be the etherchannel!
Spanning-tree is left at default. My stacks are all happy and priorotised.
Anybody any good ideas? :o)