ping6 www.freebsd.org hangs

[Pierre Dupond]

Thanks for the tip. Finally I was able to reproduce the
problem (which arise from time to time).

The ping6 command failed either with the IPv6 address (or
the name). The result is the same for an other address (like google)
but at the same time I can reach these address from other machines.

It is also possible to reach (with ping6) the external router of my organisation
(passing few intermediate routers).

What is curious however is that the command "traceroute6" succeed
and then the command "ping6" works again.

It sounds like a strange fragmentation problem.

On Fri, 6 Sep 2019 20:07:24 +0100
Matthew Seaman <matthew at FreeBSD.org> wrote:

> On 06/09/2019 18:29, Pierre Dupond wrote:
> >       Sometime when I try to pass the command
> > "ping6 www.freebsd.org" or "ping6 www.google.org" on 12.0-RELEASE-p7
> >  the ping hangs. But after a moment (perhaps 5 minutes),
> > if the command is tried again it works.
> >
>
> Do you get the same effect if you ping an IP number directly? eg.
> instead of
>
>   ping6 www.freebsd.org
>
> try:
>
>   ping6 2610:1c1:1:606c::50:15
>
>
> If there is a difference, that suggests the problem is not actually with
> the pinging, but with the DNS lookup to find the AAAA record of the host
> you want to ping.
>
> 	Cheers,
>
> 	Matthew
>


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