From: Georg Kohmann <geoko...@cisco.com> Date: Thu, 2 Aug 2018 13:56:58 +0200
> When a ICMPV6_PKT_TOOBIG is received from a link local address the pmtu will > be updated on a route with an arbitrary interface index. Subsequent packets > sent back to the same link local address may therefore end up not > considering the updated pmtu. > > Current behavior breaks TAHI v6LC4.1.4 Reduce PMTU On-link. Referring to RFC > 1981: Section 3: "Note that Path MTU Discovery must be performed even in > cases where a node "thinks" a destination is attached to the same link as > itself. In a situation such as when a neighboring router acts as proxy [ND] > for some destination, the destination can to appear to be directly > connected but is in fact more than one hop away." > > Using the interface index from the incoming ICMPV6_PKT_TOOBIG when updating > the pmtu. > > Signed-off-by: Georg Kohmann <geoko...@cisco.com> Applied, thanks Georg.
