Hi WG and authors,

I have read this document and have some questions.

In section 2.1 and 2.2, it says “An Anycast SID or BGP PeerSID MUST NOT appear 
in segment list preceding a Replication SID.”
I don’t know BGP PeerSID very well, but for anycast SID, I think it may be 
useful and suitable to appear in seg list preceding a Replication SID.
Can you please explain the two things and why MUST NOT ?

In Section 2.1, it says below:
                              There MAY be SIDs after the
                              Replication SID in the segment list of a packet. 
These SIDs are used
                              to provide additional context for processing a 
packet locally at the
                              node where the Replication SID is the Active 
Segment.  The processing
                              of SIDs following the Replication SID MUST NOT 
forward the SR-MPLS
                              packet to another node.
In Section 2.2, it says below:
                              There MAY be SIDs after the Replication
                              SID in the SRH of a packet.  These SIDs are used 
to provide
                              additional context for processing a packet 
locally at the node where
                              the Replication SID is the Active Segment.  The 
processing of SIDs
                              following the Replication SID MUST NOT forward 
the SRv6 packet to
                              some other node.  The restrictions described in 
this paragraph apply
                              to both un-compressed and compressed SRv6 
encapsulation.
I feel hard to understand how the SIDs after the Replication SID are used. Does 
it mean a “VPN SID” or something like that ?

Thanks
Jingrong

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From: spring [mailto:spring-boun...@ietf.org] On Behalf Of James Guichard
Sent: Monday, November 28, 2022 11:10 PM
To: SPRING WG <spring@ietf.org>
Cc: spring-cha...@ietf.org
Subject: [spring] WGLC for draft-ietf-spring-sr-replication-segment

Dear WG:

This email starts a 2-week Working Group Last Call for 
https://datatracker.ietf.org/doc/draft-ietf-spring-sr-replication-segment/

Please read the updated document if you haven’t already and send your comments 
to the SPRING WG list no later than December 12th 2022.

If you are raising a point which you expect will be specifically debated on the 
mailing list, consider using a specific email/thread for this point.

Lastly, if you are an author or contributor please respond to indicate whether 
you know of any undisclosed IPR related to this document.

Thanks!

Jim, Joel & Bruno


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