Although I am by no means the authority on how FEC works, I do understand the technology at issue. Cisco's implementation of FEC uses the X-OR (exclusive-OR) algorythm, and examines the last two bits of the source and destination MAC addresses. In doing this, there will be one of four possible results ( 01, 00, 11, 10 ). Each of these possible results are mapped to a bundled link. In your case, since you say you are doing this between routers, and your requirement seems to be load balancing between links, then I would suggest using a layer 3 routing protocol like OSPF that will automatically load balance between links with the same administrative cost. Again, I don't consider myself the man with all the answers, but if you are doing this between routers, then I would most definately keep my load balancing in the L3 arena, especially when it could be from a standards-based routing protocol rather than a quasi-proprietary protocol. My 2 cents, Kevin Brown Sr. Data Systems Engineer Sprint - BMO - JCMO ## nothing I say is to be considered the position of my employer. so there! ##