On 18/02/2011 05:55, Peter Nowak wrote: > You can plug SFP module (copper or fiber) into any SFP+ port. > So, on 10G port you can run either 1GE or 10GE. A well known counterexample of this is the Cisco Nexus5k, where only some of the SFP+ ports are 1G capable (first 8 on the 20 port box, and the first 16 on the 40 port box). Nick