[OpenAFS] afs: Lost contact with file server xxx.xxx.xxx.x

[John Koyle]

TIARA System Man wrote:
> hi guys,
>
> can anyone tell what is wrong with "Lost contact with file server "
> issue? that afs clinet is not in the same domain of afs server. the
> connection speed is up to 16MB/sec.
>
> my afs server is Scientific Linux SL release 5.0 x86_64
> 2.6.18-53.1.6.el5 #1 SMP. i use openafs-server-1.4.6-58.SL5.x86_64 rpm.
>
> client kernel is 2.6.18-53.1.13.el5. that is SL5 x86, too. i use
> openafs-client-1.4.6-58.SL5.x86_64 rpm in clinet.
>
> following are clinet /var/log/message logs:
> Apr 17 10:03:53 hostname kernel: afs: file server xxx.xxx.xxx.x in
> cell tiara.sinica.edu.tw <http://tiara.sinica.edu.tw> is back up
> (multi-homed address; other same-host interfaces may still be down)
> Apr 17 10:03:53 hostname kernel: afs: file server xxx.xxx.xxx.x in
> cell tiara.sinica.edu.tw <http://tiara.sinica.edu.tw> is back up
> (multi-homed address; other same-host interfaces may still be down)
> Apr 17 11:34:47 hostname kernel: afs: Lost contact with file server
> xxx.xxx.xxx.x in cell tiara.sinica.edu.tw <http://tiara.sinica.edu.tw>
> (all multi-homed ip addresses down for the server)
> Apr 17 11:34:47 hostname kernel: afs: Lost contact with file server
> xxx.xxx.xxx.x in cell tiara.sinica.edu.tw <http://tiara.sinica.edu.tw>
> (all multi-homed ip addresses down for the server)
Are there VPN's involved between the two locations?

I was using OpenVPN and udp between two networks when I had this issue
earlier this week.  Switching OpenVPN to use TCP transport has solved
the problem.

John