[Idr] Comments on draft-ietf-idr-flowspec-path-redirect

[Yu Tianpeng <[e-mail]>]

Hi Van de Velde,
When I was reading this draft, I found this draft miss the consideration on
the concept of "color".
Color now has been defined in a couple of drafts and becoming an important
concept.
There can be at least two usages along with flowspec so far I have found:

1. redirect to a color of a SR policy (refer to
draft-ietf-spring-segment-routing-policy).
This draft defines the concept of SR policy which can install a list of
segments allowing per-flow based source routing.
To allow usage of SR-policy along with draft (redirect to a SR-policy), we
can simply use BSID which has been defined in the current draft.
But there is also a scenario defined called "color only steering in section
8.8.1" I would suggest taking into consideration.

2. Flex-Algo
By redirecting to color, we are able to redirect traffic to another alogo
topology/slice.

By the way, I didn't see the resilence consideration in this draft as the
redirected path is always a BSID, and there is no place to pre-install the
backup path.
Did I miss something here?

What is your idea about this?

Comments above apply to your ietf0-srv6 one :)

Thanks in advance.
Regards,
Tim