From: Bob Sinclair (bsin@cox.net)
Date: Fri Dec 05 2003 - 00:29:13 GMT-3
CCIE2B,
Doyle V2 is the only reference I can find that explicitly says that you only
have to include sub-AS's with with you actually peer (page 289). If a
particular router does not peer with a router in another sub-AS, then it
does not need to list that sub-AS in the confederation peer statement. This
makes sense given Halabi's explanation of this command:
quote from page 421>
RTG uses the router command bgp confederation peers 65060 to preserve all
the attributes, such as local preference and next hop when traversing the
EBGP session to AS 65060
end quote.
In other words, the command qualifies a peer statement. If there is no peer
statement to a given sub-AS, then there is no need to qualify it.
Hope that helps,
-Bob Sinclair
CCIE #10427, CISSP, MCSE
bsinclair@netmasterclass.net
----- Original Message -----
From: "ccie2be" <ccie2be@nyc.rr.com>
To: "kasturi cisco" <kasturi_cisco@hotmail.com>; <ccielab@groupstudy.com>
Sent: Wednesday, December 03, 2003 8:50 AM
Subject: Re: The bgp confederation peers as-number [... as-number] command
> Hi Kasturi,
>
> Thanks for your response. I think, however, you didn't quite understand
what
> I was asking.
>
> What you said is correct but doesn't address the question I had. My
question
> was which sub AS's should be specified with this command. There are 2
> possible choices: List all sub AS's in the confed or list just those sub
AS's
> to which the router is peering.
> ----- Original Message -----
> From: kasturi cisco
> To: ccie2be@nyc.rr.com ; ccielab@groupstudy.com
> Sent: Wednesday, December 03, 2003 8:08 AM
> Subject: RE: The bgp confederation peers as-number [... as-number]
command
>
>
> Hi,
>
> The way i have used it and seen it being used is follows:
>
> If there is a Confed with multiple Sub-As then the confed peers is for
> routers which have another Sub As peer. Routers within confed-sub-As
and/or
> routers with no peering to another sub AS need not use the command.
>
> As always correct me if needed.
>
> Good Luck,
> Kasturi.
>
>
>
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