On May 20, 2024, at 8:12 PM, Orie Steele <orie@transmute.industries> wrote:
> 
> On Mon, May 20, 2024 at 6:24 PM Alan DeKok <al...@deployingradius.com>
> wrote:
>> 
>> "It MUST only send a NAK TLV for a TLV which is marked mandatory."
>> 
> 
> It MUST send a NAK TLV for any TLV which is marked mandatory but not
> understood?

  Yes.

>>  If all TLVs in a message
>> are marked optional and none are understood by the peer, then a Result TLV
>> SHOULD be sent to the other side in order to
>> continue the conversation.  It is also possible to send a NAK TLV when all
>> TLVs in a message are marked optional.
>> 
> 
> Seems better to me, perhaps strengthen the second part as well:
> 
> If all TLVs in a message are marked optional and all are understood by the
> peer, a NAK TLV SHOULD be sent.

  I'm not sure we'd want to send a NAK TLV is all TLVs are understood?


> > [ re: PAC ]
> > 
>>  No.  It should be handled as an unknown TLV.
>> 
> 
> Perhaps "deprecated TLV are ignored, similar to Outer TLVs that are invalid
> or contain unknown values"
> 
> ```
> 1064   1.  If Outer TLVs are invalid or contain unknown values, they will be
> 1065       ignored.
> ```

  Sure, sounds good.

>>  I don't think so.  This is the only deprecated TLV, and I don't think
>> anyone implemented it.
>> 
> 
> All the more reason to state explicitly that it should be silently ignored?

  Yes.  I'll make that change

> 
>>> Is the guidance in Section 4.2.12 of RFC7170 unchanged in this update?
>> 
>>  That section of 7170 describes how to use the PAC TLV.  Since we're no
>> longer using it, the guidance given previously can be safely ignored.
>> 
> 
> Because the PAC TLV MUST be treated as invalid or containing unknown values?

  Yes.

  Alan DeKok.

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