On Wed, 7 Oct 2020 14:53:02 +0200 Georg Kohmann wrote: > When a ICMPV6_PKT_TOOBIG report a next-hop MTU that is less than the IPv6 > minimum link MTU, the estimated path MTU is reduced to the minimum link > MTU. This behaviour breaks TAHI IPv6 Core Conformance Test v6LC4.1.6: > Packet Too Big Less than IPv6 MTU. > > Referring to RFC 8201 section 4: "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. A node must not reduce its estimate of the Path > MTU below the IPv6 minimum link MTU on receipt of a Packet Too Big > message." > > Drop the path MTU update if reported MTU is less than the minimum link MTU. > > Signed-off-by: Georg Kohmann <geoko...@cisco.com>
Applied, thank you!
