RE: I-BGP

From: James Yeo (james@net-brigade.com)
Date: Sun Jul 04 2004 - 18:12:16 GMT-3

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Hi Tom,

Basically lab sets up i-bgp between r2 and r7 using "rrc" however that works
fine and routes show up etc. Problem is there is r4 in the middle not
running bgp as a process therefore when you try and ping the i-bgp networks
it fails because "piggy in the middle" is clueless with regards to those
routes. You are not told to redistribute or configure bgp on r4.

I was wondering if it possible on Gods' green earth to be able to ping...

I think not

What do you think?

Kind regards

James

-----Original Message-----
From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf Of Tom
Martin
Sent: Friday, July 02, 2004 10:39 PM
To: ccielab@groupstudy.com
Cc: James R. Yeo
Subject: RE: I-BGP

James,

It is a little unclear exactly what you are trying to accomplish and
what lab requirements/restrictions there are. Here are some suggestions:

1. MPLS
2. Run BGP on R4 (peer to R7 as RR client)
3. Tunnel BGP and transit traffic through R4
4. Redistribute BGP into the IGP

-- Tom

-----Original Message-----
From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf Of
James R. Yeo
Sent: Friday, July 02, 2004 4:17 PM
To: ccielab@groupstudy.com
Subject: I-BGP

Hi group,

If you have i-bgp running with route-reflectors and they are not
directly
connected e.g.

r2--> bgp & rrc to r7----r4(no bgp)------<--r7 bgp

Can you ping!! Routes show up in table but cannot ping as it dies @ r4
as
r4 has no idea about the bgp networks.

Route table on r2:
     177.177.0.0/24 is subnetted, 1 subnets
B 177.177.177.0 [200/0] via 150.50.77.77, 00:28:31

show ip bgp on r2
BGP table version is 22, local router ID is 200.200.22.22
Status codes: s suppressed, d damped, h history, * valid, > best, i -
internal,
              r RIB-failure, S Stale
Origin codes: i - IGP, e - EGP, ? - incomplete

   Network Next Hop Metric LocPrf Weight Path
*> 122.122.122.0/24 0.0.0.0 0 32768 i
*>i177.177.177.0/24 150.50.77.77 0 100 0 i

Any comments!?

• Next message: Richard Dumoulin: "BGP indecision !?!?"
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• Maybe in reply to: James R. Yeo: "I-BGP"
• Next in thread: Tom Martin: "RE: I-BGP"
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