CEF was designed to improve performance on core, backbone routers, that handle a lot of dynamic traffic to a variety of destinations. It also has major benefits for load sharing. It wasn't designed for an edge router with only one egress like you're talking about.
Nonetheless, I think it would still speed things up. The main advantage of CEF is that it never has to do any process switching. It can immediately use the FIB and adjacency table. Compare CEF to fast switching. With fast switching, the first packet to a Layer-3 destination must be process switched. If you have lots of Layer-3 destinations, this is especially bad. In that case, CEF would definitely help. Packet Magazine did a nice article on CEF here: http://www.cisco.com/warp/public/784/packet/oct00/p94-cover.html And here's an even better article from TAC: http://www.cisco.com/warp/public/105/20.html Priscilla >bergenpeak wrote: > > Suppose you have an edge router that has 10 or so connected subnets > and a default egress route. This box is not running a dynamic > routing protocol. > > If one was to enable CEF on this box (over fast switching), would one > expect to see any/much performance improvement? This box does not > support dCEF (72xx chassis). > > Thanks > [EMAIL PROTECTED] ________________________ Priscilla Oppenheimer http://www.priscilla.com Message Posted at: http://www.groupstudy.com/form/read.php?f=7&i=35336&t=35183 -------------------------------------------------- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
