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Re: [Idr] I-D Action: draft-ietf-idr-rs-bfd-02.txt

Robert Raszuk <robert@raszuk.net> Tue, 14 March 2017 13:30 UTC

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From: Robert Raszuk <robert@raszuk.net>
Date: Tue, 14 Mar 2017 14:30:23 +0100
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To: Nick Hilliard <nick@foobar.org>
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Cc: Interminable Discussion Room <idr@ietf.org>
Subject: Re: [Idr] I-D Action: draft-ietf-idr-rs-bfd-02.txt
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Clearly it requires a bit out of the box perspective ;-)

For those interested it does borrow a bit from RFC6769
<https://goo.gl/zOk1fy> as well as from the notion of BGP Virtual Next Hop
proposal/patent.

Best,
R.


On Tue, Mar 14, 2017 at 1:56 PM, Nick Hilliard <nick@foobar.org> wrote:

> Robert,
>
> your proposal is not even wrong.
>
> Nick
>
> Robert Raszuk wrote:
> > If someone is using weak BGP stacks which can not handle two BGP paths
> > per net .. sorry that to me does not justify inventing new SAFI.
> >
> > Moreover the idea behind the new SAFI is flawed since it assumes RS
> > always would have a secondary path to send to client. Otherwise noise of
> > 1000 peers bombarding RS with message "NH-X is not reachable" is pretty
> > useless if given net has only one NH on the RS.
> >
> > Moreover those weak clients which can not run best path for RS received
> > nets are now subject to handle 1000 BFD sessions ... it really does not
> > sound right that an edge can do the latter just fine and not the former.
> >
> > Last to address real world problem - I proposed very easy solution which
> > you as an IXP operator can enable today via simple config on your switch
> > and treat such switch (or pair of switches) as default forwarder. Done !
> > Fully backward compatible with existing IXP deployment too.
>
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