From: Nick Shah (nshah@connect.com.au)
Date: Thu Sep 05 2002 - 07:45:12 GMT-3
RE: BGP ConfederationsJohan
An 'ideal' confed setup would be something like this..
R1 & R2 both should have
router bgp 65002
bgp confed identifier <AS #> (this is the true AS # which is represented to
the outside world, not confed AS)
Then on R2, you will need extra
bgp confed peers 65001 (this is not needed on R1)
on R3, R4 & R5
router bgp 65001
bgp confed identifier <AS #> (this is the true AS # which is represented to
the outside world, not confed AS)
on R3
bgp confed peers 65002
However, I have seen that 'bgp confed identifier <AS #> is not 'strictly'
needed on R1 & R4, R5, since they dont have any eBGP neighbor. As a matter of
'aesthetics' and 'clarity' we may choose to include it.
rgds
Nick
----- Original Message -----
From: Meyer, J. (Johan)
To: 'Nick Shah' ; Meyer, J. (Johan) ; ccielab@groupstudy.com
Sent: Thursday, September 05, 2002 8:33 PM
Subject: RE: BGP Confederations
R1,R4 and R5 have been configures as normal IBGP peers where R3,R4,R5 are in
AS 65001
and R1 and R2 are in AS 65002 only R2 and R3 have any bgp confred commands
as these connect to other AS's.
-----Original Message-----
From: Nick Shah [mailto:nshah@connect.com.au]
Sent: Thursday, September 05, 2002 10:13 AM
To: Meyer, J. (Johan); ccielab@groupstudy.com
Subject: Re: BGP Confederations
Comments inline...
>
> I would like some clarification on BGP confederation configs
>
> I have the following setup
>
> BB1 BB2
> I I
> R1-----R2---------R3---------R4-----------R5
>
> R2 and R3 are in AS 65001 and AS 65002 respectively
> Both R2 and R3 have the commands BGP Confederation Peers of 65001 ,65002
and
> BGP Confederation ID of 2001 2002
R2 will need confederation peer commands for every 'directly connected'
confed peer (same goes for R3). So if for eg. confed 65005 is not directly
connected to R2, you dont need a confed peer for that.
> My question is do R1,R4 and R5 need the BGP Confederation commands
aswell??
> As I have configured them without and all BGP connectivity seems to be
> working?
How are R1, R4 & R5 configured, as confed peers or External peers. ?
Nick
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