Hi, Stavros.
RFC 1981 - Path MTU Discovery for IPv6 - says,
4. Protocol Requirements
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238 A node MUST NOT reduce its estimate of the Path MTU below the IPv6
239 minimum link MTU.
240
241 Note: A node may receive a Packet Too Big message reporting a
242 next-hop MTU that is less than the IPv6 minimum link MTU. In that
243 case, the node is not required to reduce the size of subsequent
244 packets sent on the path to less than the IPv6 minimun link MTU,
245 but rather must include a Fragment header in those packets [IPv6-
246 SPEC].
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v6LC.4.1.6 Part A and B is verifying this behavior.
Test scripts expect that NUT doesn't reduce PMTU less than 1280 byte,
but NUT uses Fragment Header.
Thanks,
On Fri, 8 Jul 2005 11:36:58 -0400
"Stavros Dukas" <sdukas@spectracomcorp.com> wrote:
> Hi,
>
> I am running the IPv6 ready Phase 2 conformance tests and
> getting 2 fails in the Path MTU Discovery tests. Tests 9 and 10 (MTU
> size 0x0 and MTU size 512 respectively). I'm running the tests on a
> 2.4.29 USAGI patched kernel. I think it is due to my host machine not
> resetting its PMTU size to react to the Packet Too Big message or
> setting it to the wrong value. Can someone help me with this?
>
> Thank you in advance,
>
> Stavros Dukas
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Yukiyo Akisada <akisada@64translator.com>