about interdomain multipath routing.

Steven King sking at kingrst.com
Tue Nov 10 04:22:23 UTC 2009

Those are very good points Jack. We stopped using multihop for those
same reasons.

Jack Bates wrote:
> Matthew Petach 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.
> Same here for my connections, though some of my customers are stuck
> with multihop eBGP in certain remote areas, but that's a completely
> different scenario (single link, but obsolete equipment) and out of my
> control.
> I much prefer multipath, especially given that the standard multihop
> config uses static routing and there are conditions that could cause
> the flap of the eBGP session during a single link outage. With
> Multipath, only the effected path goes down, as it should.
> Jack

Steve King

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

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