From: Joseph Brunner (joe@affirmedsystems.com)
Date: Wed May 07 2008 - 23:59:48 ART
I would vote against redistributing an igp into bgp... everytime someone
does a "clear ip ospf process" millions of routers around the world waste
cpu time - THANKS!!!
A better idea is if this is the ONLY place where these blocks will be
advertised to bgp, just redistribute static's to BGP (the statics will be
held down with ip route w.x.y.z 255.255.x.0 null0 254
Many big ISP's do this.
Since you are going to prepend you can just write up some big prefix-lists
and match in them in route map sequences for the as path prepends.
Nothing fancy... I have seen 500 networks done this way... no biggie.
-Joe
-----Original Message-----
From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf Of Luan
Nguyen
Sent: Wednesday, May 07, 2008 10:53 PM
To: ccielab@groupstudy.com
Subject: Prepend routes redistribute from OSPF to BGP
Hello,
Say i have a broadcast network of 10 OSPF routers. Each have a variety of
inter, intra, external routes.
One router peer BGP with an upstream. I want to advertise all OSPF networks
to the upstream. But i want a set of routes to have AS-PATH prepend. I
need to redistribute OSPF into BGP since the amount of routes are too many
to use network statements and too discontinuous to advertise summary routes.
Any idea how i could accomplish this?
TIA
-lmn
This archive was generated by hypermail 2.1.4 : Mon Jun 02 2008 - 06:59:16 ART