On Tue, Nov 10, 2009 at 3:50 AM, Matthew Petach <[email protected]> wrote: > I've outlawed the use of multihop eBGP for load-sharing here; when we get > multiple links off the same router to a peer or upstream, they are configured > with multipath. We've got hundreds of BGP sessions across the network > configured with multipath on them. >
Do you use iBGP multipath as well to load-balance between links on different routers? I know eBGP multipath is fairly common, but I wonder how many are using iBGP multipath as well. I doubt any carriers would support it, so it's probably only useful for load-balancing outbound traffic. The problem with eBGP multipath alone is that you might want to terminate circuits from a given carrier on two different routers for redundancy reasons, but that precludes any load-balancing with eBGP multipath. Obviously your network has to be designed with equal-cost paths for iBGP multipath to be of any value. -Doug
