[Isis-wg] Ben Campbell's No Objection on draft-ietf-isis-rfc4971bis-03: (with COMMENT)

["Ben Campbell" <[e-mail]>]

Ben Campbell has entered the following ballot position for
draft-ietf-isis-rfc4971bis-03: No Objection

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COMMENT:
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The first sentence in section 4 says:

   Routers that do not support the Router CAPABILITY TLV MUST silently
   ignore the TLV(s) and continue processing other TLVs in the same LSP.

Is this the authoritative text for a new requirement, or is that
preexisting behavior defined elsewhere? If the former, why would we
expect an implementation that does not implement this spec (perhaps the
implementors haven't read it) to honor this requirement? If the latter,
then please state it descriptively (i.e. without 2119 keywords),
preferably with a citation.