Hi, all. First off I must admit I'm a newbie when it comes to the Cisco routing & switching. I'm learning, so please bear with me if I miss something that's painfully obvious to the more experienced, hehe. Here's the problem:
We have an ME3400-TS metro switch that connects our 3845 router and our ASA5510. Fa0/22 on the 3400 connects to ethernet0/0 on the ASA, which is the outside connection on the ASA. Well, fa0/22 seems to be taking a load of errors and dropping connections (LED flashes amber every few seconds). After checking out the interfaces I see that fa0/22 on the 3400 is running 100Mb/half-duplex while ethernet0/0 on the 5510 is running 100Mb/full. Hey! No problem! Just force them both to 100Mb/full, right? Negative, hehe. The connection goes down completely if I do that. The only way to get them talking again is to set them both to auto speed/duplex, but, of course, the mismatch errors start again. Any suggestions would really help bail me out. Thanks very much!