On 2016-09-13, Fernando Gont <ferna...@gont.com.ar> wrote: > On 08/09/2016 07:42 AM, Laurent CARON wrote: >> Hi, >> >> Does anybody have a clue about this issue ? Thanks > > Based on a quick look at what you sent, this is not what I would expect. > > >> Am I mistaken on something, or is this behavior perfectly normal ? >> >> Please note # tracepath6 from the linux box to the openbsd one reports: >> Resume: pmtu 1500 hops 2 back 2 > > This doesn't really matter. PMTU can be assymetric. So you should use > tracepath6 from OpenBSD ot Linux, since that's the direction in which > traffic is being fragmented. > > Thanks,
Last time I looked at tracepath it was quite Linux-specific code and not very portable. You can get similar information from the useful tool "scamper": $ scamper -I 'trace -M [ip_address]' or with the OpenBSD package you can do 'scamper-trace -M [ip]' - note that it wants a numeric v4/v6 address not a hostname.
