I have not found a way to do this but I was wondering if I can configure one of the ports on a Catalyst 3020 in a blade server (HP in my case) as a pass-though port to one of the internal NIC's? Anyone know if this is possible?
We do not have the pass-though modules, just need one port to do this.
Just wanted to make sure, as the term pass-thru seems to be getting used in different ways by different people nowadays :-). In this case, the answer is that I do not know of a way to make a switch act like a physical pass-thru. The best that can be done is to dedicate a server port and an uplink port to a single common VLAN, or making use of PVLAN as noted before, to isolate traffic flows.
On that note, if you absolutely have to have physical isolation such as you desire, then a physical pass-thru is the only option.
I can tell you that I've worked with customers that have used blade switches for heartbeats, so I'm not so sure you need this complete isolation, but that is certainly an individual judgment call.