[Idr] BGP flooding and AS-PATH

Robert Raszuk <robert@raszuk.net> Mon, 11 March 2019 09:34 UTC

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From: Robert Raszuk <robert@raszuk.net>
Date: Mon, 11 Mar 2019 10:34:44 +0100
Message-ID: <CAOj+MMEH276xQscJDXaGCH3wmZZynkfP+TJD-Zxd06ZyfxU1YQ@mail.gmail.com>
To: "Ketan Talaulikar (ketant)" <ketant@cisco.com>
Cc: "idr@ietf. org" <idr@ietf.org>
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Subject: [Idr] BGP flooding and AS-PATH
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Dear authors of draft-ketant-idr-bgp-ls-bgp-only-fabric,

I would like to ask for a small clarification on how in the quoted RFC7938
design are you going to propagate topology information between peers
configured with the same AS number ? Say between devices belonging to tier
1 stage or to a sets in tier 2 stages ?

Do you assume that those switches just do not need to be aware of each
other's presence say for TE purposes ?

Specifically I am curious how are you going to accomplish it in the cases
where no AS-PATH removing controller is involved as described here:

"An internal software component on any of the BGP routers

(e.g. TE module) can also receive the entire BGP network

topology information from its local BGP process."


Thx a lot,
R.