Re: [Bier] WG adoption call for draft-chen-bier-frr-02

Michael Menth <menth@uni-tuebingen.de> Tue, 16 March 2021 19:03 UTC

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To: Huaimo Chen <huaimo.chen@futurewei.com>, "bier@ietf.org" <bier@ietf.org>
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From: Michael Menth <menth@uni-tuebingen.de>
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Subject: Re: [Bier] WG adoption call for draft-chen-bier-frr-02
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Hi Huaimo,

Am 16.03.2021 um 17:02 schrieb Huaimo Chen:

> [HC]: When the routing underlay supports IP FRR, the BIER should also 
> provide BIER FRR since the BIER packets are forwarded using the BIFTs. 
> When failures happen in the network, the BIER packets are still forwarded 
> using the old BIFTs until the old BIFTs are updated according to the 
> updated network topology after the failures.

Right. Some form of BIER-FRR is helpful. But just tunnelling the traffic
over the underlay in case of a failure (that may be the frr action) let
the traffic benefit from the underlay's frr mechanism. That's what
tunnel-based bier-frr is about.

Regards

Michael

-- 
Prof. Dr. habil. Michael Menth
University of Tuebingen
Faculty of Science
Department of Computer Science
Chair of Communication Networks
Sand 13, 72076 Tuebingen, Germany
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