Subject: [spring] Comments on draft-ietf-spring-srv6-network-programming-01

From: Zhuangshunwan <[email-masked]>
Date: Thu, 11 Jul 2019 09:16:50 +0000

Hi all,

I have read this document again and again, and think it is a good guide to implantation.
Thanks to the authors for introducing this very useful draft.

Few comments:

#1
2.  Terminology
...
   The effective next-header (ENH) is the next-header field of the IP
   header when no SRH is present, or is the next-header field of the
   last SRH.

[Shunwan] It's better to change "the next-header field of the IP header ... " to "the next-header field of the IPv6  header ..." .

#2
4.7.  End.DT2M: Decapsulation and L2 table flooding

   The "Endpoint with decapsulation and specific L2 table flooding"
   function (End.DT2M for short) is a variant of the endpoint function.

   This function may take an argument: "Arg.FE2".  It is an argument
   specific to EVPN ESI filtering.  It is used to exclude a specific OIF
   (or set of OIFs) from L2 table T flooding.

[Shunwan]
This section says: "It is an argument specific to EVPN ESI filtering.  "
Question: Can it also be an argument specific to EVPN E-Tree [RFC8317] Leaf filtering?
If I understand it correctly , the specifications defined in this section can also be easily applied to EVPN E-Tree Leaf filtering.

Thanks,
Shunwan