From: Sage Vadi (sagevadi@yahoo.co.uk)
Date: Fri Dec 20 2002 - 15:14:38 GMT-3
Hi Liban,
AS1 = 2 routers
AS2 = 1 router
Both the routers in AS1 are directly connected to the
one router in AS2. The problem is that the router in
AS2 is not seeing multipath routes. This is strange as
when I use 1 router in AS1 and 1 router in AS2 I can
then see multiple routes.
Multipath seems/is meant to work if the routes are
sourced from a single AS.
What makes you say maximum-paths is per neighbor? From
what I have seen, it is per-AS. IE - it will work when
receiving routes from a single AS. If routes are
sourced from different AS's, BGP tuning -
weights/local_pref etc need to be used. I have tested
the above in my lab.
Also I believe max-paths is a Cisco specific feature
and is not defined in the BGP RFC (v4) anyway. There
are tons of others written around BGP.
rgds,
Sage
--- Liban.Mohamed@mail.sprint.com wrote: > Sage,
>
> Let me ask a question you mention the two other
> routers(the same AS)
> are they ebgp multihop sourcing from a loopback or
> they have 2
> different neighbor. Max-path is per neighbor. not
> per AS# Give me more
> infor on your setup
>
>
>
> thanks,
>
> Liban Mohamed
> IP Engineer
> sprintlink Backbone Operation
> www.sprint.net
>
>
> -----Original Message-----
> From: sagevadi [mailto:sagevadi@yahoo.co.uk]
> Sent: Friday, December 20, 2002 10:15 AM
> To: ccielab
> Cc: sagevadi
> Subject: BGP - Multipath/Loadbalancing (maximu-paths
> x)
>
>
> Dear all,
>
> According to CCO/Halabi, max-paths xxx works only
> when
> receiving routes from a SINGULAR AS.
>
> This is my problem:
>
> When I configure "max-paths" on a router that is
> directly connected to another router (one router to
> one). The loadbalancing works fine - the output of
> the
> show ip route shows both the routes.
>
> Problem: when I connect one router to two other
> routers (the two other routers are in the SAME AS) I
> do not see the loadbalancing work - ie the show ip
> route only shows one route.
>
> Q) Any ideas?
>
> I don't want to go into config's right now, it could
> be something simple...
>
> rgds,
> Sage
>
> __________________________________________________
> Do You Yahoo!?
> Everything you'll ever need on one web page
> from News and Sport to Email and Music Charts
> http://uk.my.yahoo.com
> .
>
This archive was generated by hypermail 2.1.4 : Fri Jan 17 2003 - 17:21:50 GMT-3