Robert Wilton has entered the following ballot position for
draft-ietf-spring-mpls-path-segment-18: No Objection

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COMMENT:
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Hi,

Thanks for this document.  I found is pretty easy to read, and have a couple of
very minor (editorial) comments:

Nit level comments:

(1) p 6, sec 3.1.  PSID for Performance Measurement

   PSID can also be used for In-situ OAM[RFC9197] for SR-MPLS to
   identify the SR Path associated with the in-situ data fields in the
   data packets on the egress node.

   PSID can also be used for In-band PM for SR-MPLS to identify the SR
   Path associated with the collected performance metrics.

Just cosmetic, but given the repetition, perhaps put the last 3 sentences in
this section into a list, e.g., starting with "PSID can also be used:"

(2) p 7, sec 3.4.  Nesting of PSIDs

   Binding SID (BSID) [RFC8402] can be used for SID list compression.
   With BSID, an end-to-end SR path in a trusted domain can be split
   into several sub-paths, each sub-path is identified by a BSID.  Then
   an end-to-end SR path can be identified by a list of BSIDs,
   therefore, it can provide better scalability.
   BSID and PSID can be combined to achieve both sub-path and end-to-end
   path monitoring.  A reference model for such a combination in
   (Figure 2) shows an end-to-end path (A->D) in a trusted domain that
   spans three sub-domains (Access, Aggregation and Core domain) and
   consists of three sub-paths, one in each sub-domain (sub-path (A->B),
   sub-path (B->C) and sub-path (C->D)).  Each sub-path is associated
   with a BSID and a s-PSID.

As a minor nit, s-PSID is used above, but not defined until the following
paragraph.

Regards,
Rob



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