It was assumed that the odd/even pairing mentioned is for consecutive ports on the same module starting with the odd number. Guy From: James Saker o keep on the same blade on the Catalyst 5500. 4/1-2 or 7/1-2 works fine. 4/1 and 7/1 does not (I also tried 4/1,7/2 per the even/odd discussion; no go!).