rohc team mailing list archive

[Josephine Kakande <jnkakande@xxxxxxxxx>]

Hi,

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.

Thanks a lot,
Josephine

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
>
>