From: Eli Kosharovsky (eli_kosh@netvision.net.il)
Date: Wed Jan 17 2007 - 04:59:17 ART
Hi,
Sorry but I don't have very good new for you. Its not easly done if at all
possible. I have researched this problem quite a lot. I have tried to modify
the AD, it doesn't work.
There are some things you can do but this is really ugly:
1) There is a command called "maximum-path eibgp X" meaning the a router
will install both eBGP & iBGP routes to the routing table. The catch is that
this command was designed for a PE router running MP-BGP for MPLS-VPN. While
do use this command on MPLS core and it works fine, I didn't try to use it
the way needed to your implamintation, you can run all your traffic in R3
inside a VRF (VRF Lite) and then under the BGP address family for that VRF
you should be able to use the command specified.
Again, I am not sure that this is a good advice if we are speaking real life
scenario.
http://www.cisco.com/univercd/cc/td/doc/product/software/ios124/124cg/hirp_c
/ch05/heibmpl.htm
2) You can try to use OER (Optimized Edge Routing). I am not sure it will
solve your problems, because it very much depends on exactly what you want
to do. If you can figure out how this feature can help you, I think this
will be the preffered way to go.
http://www.cisco.com/univercd/cc/td/doc/product/software/ios124/124cg/hoer_c
/index.htm
Eli
-----Original Message-----
From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf Of
Dishan Gamage
Sent: Friday, January 12, 2007 2:20 PM
To: Cisco certification
Subject: changing BGP distance (IBGP-EBGP)
Hi Gruop
I have a setup, is as follows
1. R1 is connected to 2 SP routers (SP-A, SP-B routers both in same AS65000)
via two seperate serial links.
2. R2 is connected to the same SP routers (AS65000) via two serail links...
3. I have enabled bgp multipath on R1 & R2 , its is working perfectly fine
and i can see two bgp entires in the bgp table, and in the routing table of
each R1 & R2 with respective lan blocks....(no issue )
4. Prob, I have R3, which is connected to R1, via p2p link (no SP in
between) via serail 1
5. R3's other serial2 is connected to one is the SP routers (ie..SP-A)
6. Now R3 wants to do multi-path, but its peered with R1 as igbp(via p2p
link) , and SP-A as ebgp.....
7. so by default, all traffic goes throgh the ebgp path (ie..AD 20)
what i want to do is get R3 to do load sharing..... and install two next-hps
on its routing table for a remote prefix.
what is the best solution ???
( if getting a direct link to R3 from SP-B is Not an option ,...I know this
the best & less complicated way....)
Tks in advance
Dishan
This archive was generated by hypermail 2.1.4 : Thu Feb 08 2007 - 23:46:56 ART