Re: [Idr] draft-jiang-idr-ts-flowspec-srv6-policy-07.txt

Hi Nat and All,

As promised, we have added SR-MPLS use case in draft-ietf-idr-ts-flowspec-srv6-policy.

Special thanks to Nat Kao for suggesting adding SR-MPLS use cases to this document.

The IETF datatracker status page for this Internet-Draft is:

https://datatracker.ietf.org/doc/draft-ietf-idr-ts-flowspec-srv6-policy/

There is also an htmlized version available at:

https://datatracker.ietf.org/doc/html/draft-ietf-idr-ts-flowspec-srv6-policy-02

A diff from the previous version is available at:

https://author-tools.ietf.org/iddiff?url2=draft-ietf-idr-ts-flowspec-srv6-policy-02

Any comments and suggestions are welcome!

Best Regards,

Shunwan

From: Idr [mailto:idr-bounces@ietf.org] On Behalf Of Nat Kao
Sent: Wednesday, August 31, 2022 4:30 PM
To: Susan Hares <shares@ndzh.com>
Cc: idr@ietf.org
Subject: Re: [Idr] draft-jiang-idr-ts-flowspec-srv6-policy-07.txt - (8/17/2022 to 8/31/2022

Hi, Susan & WG.

As an operator, I support WG adoption of this draft.
This approach is very useful for on-demand traffic steering with specific/dynamic traffic patterns.

My answers are inline:

On Wed, Aug 17, 2022 at 10:59 PM Susan Hares <shares@ndzh.com<mailto:shares@ndzh.com>> wrote:
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.

Yes.

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/

Yes, this approach provides a unified way for steering traffic into SR-policies using either SR-MPLS or SRv6 SID-lists.

Note: As discussed before, the same mechanism can also be applied to policies with SR-MPLS SID-lists.
https://mailarchive.ietf.org/arch/msg/idr/q0If1M-UgoeeM16HR-TXCSWRTAQ/

3) Will this work help deployment of SRv6 networks?

Yes.

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

Cheerily, Susan Hares

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Regards,
Nat