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[mpls] draft-ietf-mpls-lspping-norao-03 - Review

Gyan Mishra <hayabusagsm@gmail.com> Tue, 03 October 2023 05:15 UTC

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From: Gyan Mishra <hayabusagsm@gmail.com>
Date: Tue, 03 Oct 2023 01:15:16 -0400
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Subject: [mpls] draft-ietf-mpls-lspping-norao-03 - Review
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Dear authors

Below is a review of this draft.

I think it would be good to explain what a controlled versus not controlled
environment is and could be a simple sentence of single administrative
domain versus inter domain over public Internet.

There are three options available for the LSP ping so as we are deprecating
the use of LSP ping with ROA both the link local and TTL=1 should be valid
options.

RFC 5082 GTSM talks about TTL spoofing and that 255 is hard to spoof
opposed to TTL 1.  It maybe a good idea to mention that link local is the
recommendation and reasons why TTL 1 is not recommended option due to
spoofing.

This draft below on deprecating IPv6 RAO option goes into more detail and
reason why due to issue with HBH EH and RAO bring a HBH option makes it a
security risk to use HBH.  This draft has some more detail about control
plane and forwarding plane Figure 1 that could be applicable to LSP ping
RAO depreciation draft as well.

https://datatracker.ietf.org/doc/html/draft-bonica-6man-deprecate-router-alert-00


Thank you

Gyan

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