I have a question regarding the combination of etherchannel and stp.
My goal is to have four 3560G Switches connected in a ring, with 2GBit/s links between the neighbouring switches. I have connected the switches by channeling two 1GBit/s links for each connection using LACP. Spanning Tree is also working fine, disabling one of the etherchannels to break the ring.
However, I really do need the 2Gbit/s bandwidth (or at least more than 1GBit/s). So if one physical link fails, I would like the whole etherchannel to fail, so that stp would detect a link failure and activate the backup link. But what happens is that if one physical link fails the etherchannel is just reduced to a capacity of 1GBit/s, but still has a link.
Any ideas how to configure the setup I described?