On Sat, 20 Jan 2018, Mark Andrews wrote: > Which doesnâ??t work with IPv6 as UDP doesnâ??t have the field to clamp. Well, not with UDP/IPv4 either. Actually, the only protocol I know out there that has this kind of clamping (and is in wide use for clamping), is TCP. Thus, my earlier comment about making strong advise for protocols using PLMTUD. -- Mikael Abrahamsson email: swmike at swm.pp.se