I have several 3550 24 port 10/100s that were in boxes. I pulled one out and plugged it into my wall ethernet port and then plugged some computers into it. Everything worked great without having to setup anything on the switch but defaults. Then I pulled another 3550 out and plugged it into another network jack in another building. Then both switches quit operating. That is to say, all computers connected to them couldn't get out to the network. The only connectivity they had was the ability to ping the other 3550 switch I had on the network, and vice versa.
Both switches are plugged into regular wall jacks with standard cables (not crossover).
I am sure this must be a simple solution, but I can't seem to find it. Can anyone help me out?