[c-nsp] ebgp load balancing using maxiumu-paths TCAM impact on Sup720-3BXL?

Pete Templin petelists at templin.org
Thu May 21 10:27:39 EDT 2009

Phil Mayers wrote:

> I'm not 100% certain about this, but my understanding is that there is 
> still only 1 FIB entry for the route; it just has >1 next hop.
> However - will this work? For eBGP-multipath, the paths have to be 
> basically identical except next-hop. This won't be the case, since each 
> router will prefer its direct link (lower IGP cost).

I think you're close: rule #7 says "Prefer eBGP over iBGP paths", so 
each router will prefer its direct link (since it's external).  The 
indirect paths won't be available for parallel path selection since 
they've fallen out before the bottom.


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