Re: about interdomain multipath routing.

[Steven King <sking () kingrst com>]

We use multipath setups for our EIGRP and iBGP configurations for our
internal routing as well. Although for larger networks iBGP multipath
might be of use due to memory limitations on a lot of devices.

Doug Lane wrote:
> On Tue, Nov 10, 2009 at 3:50 AM, Matthew Petach <mpetach () netflight com> 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
>
>   

-- 
Steve King

Network Engineer - Liquid Web, Inc.
Cisco Certified Network Associate
CompTIA Linux+ Certified Professional
CompTIA A+ Certified Professional