Hi,

First time here, so not sure if I can ask non-security related questions. However, the overall purpose is to install an IDS system on my college uplink.

I have a Cisco 3550 12G running as a router for my college network, which aggregates the various networks, and provides an uplink to the university. Of the 10 fiber ports/2Copper ports, port 11 [Copper] provides the uplink.

I also have a Cisco 3550 12T and I wanted to stack these two using Cisco GBICs to achieve higher port density. My goal was to free up one of the ports on the 12G switch, so that I can use that for port mirroring the college uplink

However, my questions [at the moment] are around stacking the two layer 3 devices. How do I do that? I inserted the GBICs into slots, but is there any CLI configuration? ALso, does such stacking allow configuration commands to affect both devices, i.e., would the two devices act as one Layer 3 switch?

And just to know what I'm talking about when I talk bout the GBIC for stacking, its this one:
http://www.cisco.com/en/US/products/...0800a1789.html

Thanks a lot if anyone can help out.

Danke Schoen

Lui