Re: [Idr] WG adoption call for draft-merciaz-idr-bgp-bfd-strict-mode-02.txt (9/2 to 9/17/2019)

Jeffrey Haas <jhaas@pfrc.org> Tue, 10 September 2019 16:57 UTC

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Date: Tue, 10 Sep 2019 13:00:30 -0400
From: Jeffrey Haas <jhaas@pfrc.org>
To: Robert Raszuk <robert@raszuk.net>
Cc: "Mercia Zheng (merciaz)" <merciaz@cisco.com>, "idr@ietf.org" <idr@ietf.org>, Susan Hares <shares@ndzh.com>
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Subject: Re: [Idr] WG adoption call for draft-merciaz-idr-bgp-bfd-strict-mode-02.txt (9/2 to 9/17/2019)
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Robert,

On Mon, Sep 09, 2019 at 11:43:34PM +0200, Robert Raszuk wrote:
> While someone could run iBGP in a p2p mode as DC reachability protocol that
> is rather an exception then a rule.

Directly connected iBGP happens.

> Concluding - I think it would be pretty safe to state that draft applies
> only to point-to-point BGP sessions.

But that said, protecting iBGP when it's not directly connected also
happens.  It has a range of caveats.

IMO, it's unwise to unnecessarily restrict when strict mode gets used.  If
you're choosing to use BFD, you'll need this mechanism for interop.

-- Jeff