Hi, Bob,

AOK. Thanks,

Joe

On 5/5/2017 5:32 AM, Bob Hinden wrote:
>> On Apr 25, 2017, at 9:26 PM, Joe Touch <to...@isi.edu> wrote:
>>
>> Hi, Stewart,
>>
>>
>> On 4/24/2017 10:12 AM, Stewart Bryant wrote:
>>> Minor issues:
>>>
>>> A node MUST NOT reduce its estimate of the Path MTU below the IPv6
>>> minimum link MTU.
>>>
>>> SB> I missed this last time.
>>> SB>
>>> SB> Presumably you mean "A node MUST NOT reduce its estimate of the
>>> SB> Path MTU below the IPv6 minimum link MTU in response to such
>>> SB> a message."
>> This seems fine to me, FWIW - i.e., limiting the advice in this doc to
>> the mechanism in  this doc.
> I will add something, but this sentence follows:
>
>    If a node receives a Packet Too Big message reporting a next-hop
>    MTU that is less than the IPv6 minimum link MTU, it MUST discard it.
>
> so I think the context was clear.
>
> Bob
>
>
>>> SB>
>>> SB> Otherwise I would have thought that this was entirely a matter
>>> SB> for the host whether it wanted to use a Path MTU below the IPv6
>>> SB> link minimum. Nothing breaks if the host takes a more conservative
>>> SB> decision.
>> I don't agree; the host at that point is violating RFC2460. It should
>> never think that an IPv6 link or path with an MTU below what RFC2460
>> requires is valid.
>>
>> Joe
>>

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