First, IPv4’s minimum is 68, not 64. The header can be up to 60 octets and the
smallest fragment is 8 bytes.
Second, the problem with the logic that “bigger avoids fragmentation” is that
the very specification of ANY minimum MTU, coupled with IP-in-IP tunnels (for
their own sake, or as part of
+1
You have no way of knowing how many tunnels are being traversed.
There is no packet size that *guarantees* you have avoided fragmentation
somewhere along an Internet path.
Joe
> On Sep 10, 2019, at 6:29 AM, Templin (US), Fred L
> wrote:
>
> Fernando,
>
>> -Original Message-
>>
>>
>> This would seem to be incorrect. IP has a minimum MTU of 68 bytes, and
>> IPv6 has a minimum MTU of 1280. Hence if you send packets smaller than
>> or equal to the minimum MTU, the packets should go through.
>
> Even if the original source uses the IPv6 minimum MTU of 1280, a tunnel
> som
Fernando,
> -Original Message-
> From: Int-area [mailto:int-area-boun...@ietf.org] On Behalf Of Fernando Gont
> Sent: Monday, September 09, 2019 1:47 PM
> To: Joe Touch ; Bob Hinden
> Cc: draft-ietf-intarea-frag-frag...@ietf.org; int-area@ietf.org; IESG
> ; Suresh Krishnan
> Subject: Re
