Re: [Idr] draft-jiang-idr-ts-flowspec-srv6-policy-07.txt - (8/17/2022 to 8/31/2022

[Zhuangshunwan <[e-mail]>]

Hi Sue and WG,

I support the adoption of this draft.

The responses to the following 3 questions are as follows:


1)       Yes, I agree.

Redirect to IP with C bit Action defined in draft-ietf-idr-flowspec-redirect-ip-02 is a very useful addition to RFC8955 & RFC8956.

Flowspec Redirect to IP feature has been supported by almost all vendors and has been widely deployed.

I think it's also reasonable if we introduce the C bit into the traffic-action extended community.


2)       Yes, I agree that this document is a useful addition to draft-ietf-idr-flowspec-path-redirect.

Document draft-jiang-idr-ts-flowspec-srv6-policy introduce a combination: redirect-ip extended community + Color extended community and then uses it as (N,C) to resolve recursively via  SRv6-Policy, it can reuse most existing implementations and is easy for deployment.


3)       Yes. This work is very helpful for SRv6 network deployment. Currently, at least 4 vendors have implemented this feature and pass the interoperability test.



Regards,
Shunwan



From: Idr [mailto:[e-mail]] On Behalf Of Susan Hares
Sent: Wednesday, August 17, 2022 10:59 PM
To: [e-mail]
Subject: [Idr] draft-jiang-idr-ts-flowspec-srv6-policy-07.txt - (8/17/2022 to 8/31/2022

This begins a 2 week WG adoption call for draft-jiang-idr-ts-flowspec-srv6-policy-07.txt
https://datatracker.ietf.org/doc/draft-jiang-idr-ts-flowspec-srv6-policy/

During your discussion of this draft, please consider:

1) Do you agree with extending 8955 and 8956 to carry the
action bit [C] found for IPv4 and IPv6 found
draft-ietf-idr-flowspec-redirect-ip-02.txt

Figure 1 : Local Administrator

0                   1
0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
|          Reserved           |C|
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+

C = 0 - redirect original flow
C = 1 - redirect copy of original flow

This bit augments the Redirect to IP action in RFC8955
And RFC8956.

2) Do you agree with this document use of this feature
in addition to  draft-ietf-idr-flowspec-path-redirect
https://datatracker.ietf.org/doc/draft-ietf-idr-flowspec-path-redirect/

See the following thread for a discussion of this in March:
 https://mailarchive.ietf.org/arch/msg/idr/HENTMEoiMJGmcMuVz7LTYclCSdw/

3) Will this work help deployment of SRv6 networks?

We'll discuss this draft at the IDR interim on 8/29/2022.

Cheerily, Susan Hares