Re: [Idr] [Lsr] draft-merciaz-idr-bgp-bfd-strict-mode

Jeffrey Haas <jhaas@pfrc.org> Thu, 01 August 2019 20:46 UTC

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Date: Thu, 1 Aug 2019 16:48:44 -0400
From: Jeffrey Haas <jhaas@pfrc.org>
To: "Les Ginsberg (ginsberg)" <ginsberg@cisco.com>
Cc: Greg Mirsky <gregimirsky@gmail.com>, "Acee Lindem (acee)" <acee@cisco.com>, "idr@ietf.org" <idr@ietf.org>, Albert Bloomberg <afu14@bloomberg.net>, "Ketan Talaulikar (ketant)" <ketant@cisco.com>, "lsr@ietf.org" <lsr@ietf.org>, "rtg-bfd@ietf.org" <rtg-bfd@ietf.org>, Albert F <albert.f168@gmail.com>, Susan Hares <shares@ndzh.com>
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Subject: Re: [Idr] [Lsr] draft-merciaz-idr-bgp-bfd-strict-mode
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Les,

On Sun, Jul 28, 2019 at 12:23:05AM +0000, Les Ginsberg (ginsberg) wrote:
> I have a related question:
> 
> In the case where the BGP neighbor is multiple hops away, what benefit does BFD dampening provide?
> (Note that I am assuming that there likely would be single hop BFD sessions used by the IGPs (for example) along the path to the BGP neighbor and expecting that BFD dampening would be use for the single hop sessions when appropriate.)

Multihop eBGP is an example case.  There may be no "IGP" between the two
routers.

-- Jeff