Subject: Re: [Srcomp] Fill in the blanks

From: "Chengli (Cheng Li)" <[email-masked]>
Date: Thu, 6 May 2021 12:45:31 +0000

Hi Ron,

Here is a slide[1] for helping you to understand G-SRv6 (Replace_csid in the framework draft)

For each SR path, the deck answers the following questions:

-          What information does Node 2 need?
[Cheng] Same with SRv6, the SIDs allocated by Node2, or the routes of other SIDs from other nodes. A COC flavor is introduced.

-          Where does Node 2 find that information with uncompressed SRH encoding? How many SIDS does the path require?
-          Where does Node 2 find that information with CRH compression? How many SIDS does the path require?
-          Where does Node 2 find that information with CSID C-NEXT compression? How many CSIDS does the path require?
-          Where does Node 2 find that information with CSID C-REPLACE compression? How many CSIDS does the path require?

[Cheng] by looking up the SID table. If the DA is a COC flavor SID, then G-SRv6 processing.

[1]. https://www.ipv6plus.net/resources/G-SRv6/G-SRv6_Introduction_v1.0.3.pdf

From: Srcomp [mailto:[email-masked]] On Behalf Of Ron Bonica
Sent: Saturday, May 1, 2021 4:29 AM
To: [email-masked]
Subject: [Srcomp] Fill in the blanks

Darren, Cheng Li,

Could one of you complete the attached slide deck.

The deck considers two SR paths. Both paths have segment endpoints on Nodes 2, 3, and 4. One path is loosely routed (i.e., prefix segments only). The other is strictly routed (adjacency segments only).

For each SR path, the deck answers the following questions:

-          What information does Node 2 need?
-          Where does Node 2 find that information with uncompressed SRH encoding? How many SIDS does the path require?
-          Where does Node 2 find that information with CRH compression? How many SIDS does the path require?
-          Where does Node 2 find that information with CSID C-NEXT compression? How many CSIDS does the path require?
-          Where does Node 2 find that information with CSID C-REPLACE compression? How many CSIDS does the path require?

Could you fill in the blanks for slides 8,9, 14 and 15?

                                                                            Ron

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