Cisco GBIC question

[rmscarborough]

I am connecting two 3750's to two 4948's. The 3750's have two multi-mode GBICs in ports 25/26 and are trunked together.

I am adding two 4948's to the mix and plan on using ports 27/28 on the existing 3750 to connect to the first two GBIC ports on the 4948.

The existing GBIC's on the 3750 are multi-mode GBIC.s My question is this; can I have both multi-mode and single mode GBIC's on my 3750's ?

Or do they all have to be one or the other ? i.e. all single mode or all multi-mode ?

Thanks for your input folks....

[InayathUlla Sharieff]

Rob,

Whats the SFP at the other end?

More info : https://supportforums.cisco.com/thread/2148486

Regards

Inayath

[Kyle McKay]

There is no reason you can't have some ports using Single-Mode and others using Multi-Mode. A switch does not have to be configured for one or the other.