From: Glenn Johnson (gjcomcast@comcast.net)
Date: Fri Jul 04 2003 - 13:49:20 GMT-3
John,
It looks there are several ways of doing this, one option is to place the 9
peers in a peer-group, e.g., PEER9, and then simply issue one "neighbor
PEER9 distribute-list X out" command for the entire peer-group to block the
route in question. You could keep R2 out of the peer-group and send the
150.1.10/16 route by default.
-----Original Message-----
From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf Of John
Humphrey
Sent: Friday, July 04, 2003 12:39 PM
To: ccielab@groupstudy.com
Subject: BGP network statement
yesterday I posted the following question:
I have a quick BGP question.
If R1 has 150.1.0.0/16 in its bgp table, is there a way to advertise this
route to ONLY ONE eBGP peer. I know you can use distribute-list to deny
and allow certain routes, but if you have 10 eBGP peers (hypothetical
situation) and you I wanted to send this route to R2 only, do I need to
specifically deny that route via an access-list (or prefix-list) all the
other nine peers? Seems like there must be an easier way.
I got back some very good results but it brought up another question. I
noticed that bgp "network" statements have a "route-map" option
and "backdoor" option. I know what "backdoor" is used for, but what kind
of information can be set with the route-map option. Can I use it to
solve the question I posted yesterday (only advertise the route to
specific bgp peers)?
jh
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