I've read several places where it's been said that configuring the individual ports in an etherchannel as opposed to the port-channel interface has the potential to cause loops. I've also recently seen this happen due to an engineer making that same mistake. Can anyone give me an explanation as to why that happens? My assumption was that as soon as the ports in the etherchannel were not logically the same that the etherchannel would shut down?...meaning no traffic would go across it? How does the loop form if the channel is down?