[trill] Alvaro Retana's No Objection on draft-ietf-trill-mtu-negotiation-06: (with COMMENT)

[Alvaro Retana <[e-mail]>]

Alvaro Retana has entered the following ballot position for
draft-ietf-trill-mtu-negotiation-06: No Objection

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COMMENT:
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Are there implementations of this optimization?  Have they shown the expected
improvements?  The mechanism seems ok, but the introductory text made we
wonder, specially the part about "*potentially* improving the efficiency of
link utilization and speeding link state convergence."  IOW, if the advantages
are not really know, then maybe a Standards Track document is premature.  I
really don't have a strong opinion, so I'm just wondering at this point.

Some nits:

1. There are some places where rfc2119 language is used that I think is out of
place because it is really just stating a fact or quoting what different
documents say (without actually using quotations); IOW, these are really not
normative statements defined in this document:

- "[RFC6325] describes the way RBridges agree on the campus-wide minimum
acceptable inter-RBridge MTU...all RBridges MUST format their LSPs..."

- "As specified in [RFC8139], RBridges MUST support..."

- "as required by [RFC7780], all RBridges MUST..."

2. From 2.1, these 2 sentences are redundant: "An originatingSNPBufferSize
APPsub-TLV occurring in any other fragment MUST be ignored. An
originatingSNPBufferSize APPsub-TLV occurring in any other fragment is ignored.
"