Hi Tony,

> The section 5 says:
>
>    Although MP-TLVs SHOULD NOT be sent unless the
>    capacity of a single TLV (255 octets) is exceeded, receivers MUST NOT
>    reject MP-TLVs if senders do not strictly adhere to this constraint.
>    See Section 7.3 for guidance when sending MP-TLVs.
>
> If you replace "SHOULD NOT" above with "MUST NOT" perhaps the request for
> MUST to be able to disable MP-TLV (on a per TLV basis) would make a bit of
> a weaker case.
>
>
> Do you agree that receivers MUST NOT reject MP-TLVs if the senders do not
> strictly adhere to maximum packing?  If you do agree, then why does it
> matter?  There may be good reasons for not doing maximum packing, such as
> optimal LSP packing.  A little lattitude here would be a good thing.
>
> Again, Postel’s law.
>

Indeed - receivers should accept and process chunks of data from multiple
TLVs. No question.

But the case I am worried about is introduction of a new vendor to the
network (may be to the cluster) where there is no support for some new
MP-TLVs. If I know I never need to flood more then 250 octets I may be safe
to peer it with Junos or Cisco TORs or Spines.

But if those two can inject something into MP-TLVs just because it is
convenient for them and I have no knob to stop them to do that I am locked
to two vendors :)

Cool for the vendors ... less cool for the operator.

Cheers,
R.
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