On Tue, 6 Nov 2018 22:38:56 +0100, Stefano Brivio wrote: > - patch 1/11 adds a socket lookup for UDP tunnels that use, by design, > the same destination port on both endpoints -- i.e. VxLAN and GENEVE
This is not necessarily true with lwtunnels (collect_md mode of VXLAN and GENEVE). While any sane setup will use the same dst ports, there's really nothing that enforces it. Of course, in that case we have no way to map the ICMP error back to the tunnel. Generally speaking, I'm not sure how ICMP error handling should work for external control planes. Are we sure they want PMTU discovery and route redirection done by the kernel? (I am not sure, neither way.) Jiri
