Will Any Old GBIC Work?

You have two switches and you’re thinking that you’ll use the GBIC from your old switch on you new switch.  You have an Xsan and you have a bunch of GBICs laying around and you want to know if they’ll work.  You have a fiber run and you want to use a transceiver.  Etc. This is a tricky question.  The GBICs should all work.  The general rule of thumb though is, if you use the same GBIC on both ends then you shouldn’t have a problem.  But, it’s also important that (for whatever reason) some manufacturers do require certain GBICs either to actually interface or just to support an interface.