rohc team mailing list archive

[Didier Barvaux <didier.barvaux@xxxxxxxxxxxxxxxxxxxx>]

Josephine,

> Just an update: I'm now able to ping machine B (10.0.0.2) from
> machine A (10.0.0.1) even over a switched network. The tunnel tool
> works fine.

It's great. Thanks for the positive feedback.

Didier


> On Wed, Aug 12, 2009 at 4:32 PM, Josephine Kakande
> <jnkakande@xxxxxxxxx>wrote:
> 
> >
> > Didier,
> >
> >
> >> > > The route toward network 10.0.0.0/24 is not present. It should
> >> > > be setup when the rohc0 interface will become UP and RUNNING.
> >> > > Please check that the route is present after running the 'ip
> >> > > link set rohc0 up' command.
> >> > >
> >> >
> >> > Thanks, I set up the interface correctly, but still could not
> >> > ping - the output was:
> >> >
> >> > :~# ping 10.0.0.2
> >> > PING 10.0.0.2 (10.0.0.2) 56(84) bytes of data.
> >> > ping: sendmsg: No buffer space available
> >> > ping: sendmsg: No buffer space available
> >>
> >> Ok, that did not fix the problem.
> >>
> >>
> >> > > There is an additional thing that looks strange to me. The
> >> > > ping from machine A to machine B gets a TTL of 57. The ping
> >> > > from B to A gets a TTL of 63. Beside the fact they are
> >> > > different (is there different paths to go from one machine to
> >> > > the other in your network ?), it shows that you have at least
> >> > > one router between the 2 machines. They could be the root of
> >> > > the problem. Could you please test the tunnel tool with 2
> >> > > machines on the same Ethernet link to see if it works ?
> >> > >
> >> >
> >> > I still couldn't ping even when they were directly connected:
> >> >
> >> > *Machine A:*
> >> >
> >> > [...]
> >> >
> >> > *Machine B:*
> >> >
> >> > [...]
> >>
> >> Your network setup seems fine now. There is probably a problem with
> >> rohctunnel. Could you setup the tunnel once again and send only one
> >> ICMP Echo Request in it with the following command on machine A :
> >>  $ ping -c 1 10.0.0.2
> >>
> >> It should failed. When the ping command returns, could you please
> >> send me all the traces printed by the 2 rohctunnel commands on
> >> machine A and machine B ? Put the logs as attachments to avoid
> >> line wrapping please.
> >
> >
> > It actually worked! I'm not sure why it was different this time,
> > but the ping was successful:
> >
> > *Machine A*
> >
> > # ip link set rohc0 up
> > # ip -4 addr add 10.0.0.1/24 dev rohc0
> > # ip -6 addr add 2001:eeee::1/64 dev rohc0
> > # ping -c 1 10.0.0.2
> > PING 10.0.0.2 (10.0.0.2) 56(84) bytes of data.
> > 64 bytes from 10.0.0.2: icmp_seq=1 ttl=64 time=7.84 ms
> >
> > --- 10.0.0.2 ping statistics ---
> > 1 packets transmitted, 1 received, 0% packet loss, time 0ms
> > rtt min/avg/max/mdev = 7.843/7.843/7.843/0.000 ms
> >
> >
> > Please find the logs attached..
> >
> > Many thanks.
> >
> > Regards,
> > Josephine
> >
> >