From: Ken.Farrington@barclayscapital.com
Date: Sat Sep 27 2003 - 11:55:16 GMT-3
Thats excellent. Just read it up!
Many thx
Also, just foubnd this on the cisco web site.
"Restrictions
Do not use the neighbor next-hop-self command to modify the next hop
attribute for a route reflector. Using the neighbor next-hop-self command on
the route reflector will modify next hop attributes only for routes that are
learned from eBGP peers and not the intended routes that are being reflected
from the route reflector clients. To modify the next hop attribute when
reflecting a route, use an outbound route map."
http://www.cisco.com/en/US/products/sw/iosswrel/ps1612/products_feature_guid
e09186a00800809c5.html
-----Original Message-----
From: Blanco Lam [mailto:b@gclamb.com]
Sent: 27 September 2003 15:46
To: Ken.Farrington@barclayscapital.com
Cc: ccielab@groupstudy.com
Subject: Re: BGP next-hop-self on a Route Reflector
Ken,
Route reflectors cannot modify the attributes it receives from
its clients. Quote from Doyle II page 126 - "To avoid possible loops or
other
routing errors, the route reflector cannot change the attributes of the
routes
it receives from clients".
Regards,
Blanco
---- Original message ----
>Date: Sat, 27 Sep 2003 14:37:31 +0100
>From: Ken.Farrington@barclayscapital.com
>Subject: BGP next-hop-self on a Route Reflector
>To: ccielab@groupstudy.com
>
>Good morning all,
>
> RR
> +----+
> +---------| R1 |-----------+
> | +----+ |
> | |
>+----+ +----+ lo0 1.1.1.1
>| R2 | All in AS 555 | R3 |------------------
>+----+ +----+
> RRc RRc
>
>I have the following above, and I am I am learning the 1.1.1.1 network via
>iBGP on R1 from R3 and this is being reflected to R2, but the R2 router is
>not putting this into it's routing table because the next hop in the BGP
>table is unreachable.
>
>So I tried to put on bgp next-hop-self on the RR (R1) to the neighbor for
R2
>but this has no affect.
>
>I have never use RR before with the next-hop-self and assume now that this
>does not would and I will have to use another method of setting the next
hop
>when the route reflects from R1 to R2.
>
>Can one of you techies, please let me know if this is fact, that
>next-hop-self is a no go on RRs?
>
>Many thx indeed,
>Ken
>
>
>
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visit our web site at http://www.barcap.com.
Internet communications are not secure and therefore the Barclays
Group does not accept legal responsibility for the contents of this
message. Although the Barclays Group operates anti-virus programmes,
it does not accept responsibility for any damage whatsoever that is
caused by viruses being passed. Any views or opinions presented are
solely those of the author and do not necessarily represent those of the
Barclays Group. Replies to this email may be monitored by the Barclays
Group for operational or business reasons.
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