ECMP support

Ondrej Zajicek santiago at crfreenet.org
Thu Dec 17 14:34:23 CET 2015


On Tue, Dec 15, 2015 at 10:33:30AM -0500, Brian Rak wrote:
> Does BIRD handle sending ECMP routes via BGP?  With 1.5.0, even if I enable
> 'add paths on', BIRD only sends one route even when it knows about multiple.
> To me, 8d9eef17713a9b38cd42bd59c4ce76c3ef6c2fc2 only appears to be related
> to populating the kernel routing table here, which I'm not using.

I am not sure whether i understand the question. If you have multiple
routes and ADD-PATH enabled on both sides, then all routes are propagated.
If you have one route with ECMP next hop, it is propagated as one route
in BGP (regardless of ADD-PATH). In which use case are you interested?

-- 
Elen sila lumenn' omentielvo

Ondrej 'Santiago' Zajicek (email: santiago at crfreenet.org)
OpenPGP encrypted e-mails preferred (KeyID 0x11DEADC3, wwwkeys.pgp.net)
"To err is human -- to blame it on a computer is even more so."
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