[OpenAFS] Repeated lost contact with servers - only at one location

[Orel Gueta]

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Dear Experts,

After upgrading to Ubuntu 15.10, I am experiencing connection problems with
openafs-client. Namely, I receive many messages in the syslog as below

afs: Lost contact with file server 188.184.14.76 in cell cern.ch (code -1)
(all multi-homed ip addresses down for the server)

If I disconnect and reconnect again, the servers come back up and I can
work, but after a few minutes it loses contact again. Strangely enough,
this happens only when I am home, at the office I never see these issues.
May I ask for your help in debugging this issue?

What I have tried so far:
- Ping the server which appears to be down, the server responds without
issues.
- Connect to router at home both with cable and with wireless, the problem
persists.
- Restart openafs-client and afsd, has no effect.
- fs checkservers reports a few servers down (like afs263.cern.ch), but I
can ping them.

I am using openafs-client 1.6.14.1, Kubuntu 15.10, kernel 4.2.0-19.

Please let me know what further information I can provide.
Thank you,
Orel

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<div dir=3D"ltr"><div class=3D"gmail_default" style=3D"font-family:tahoma,s=
ans-serif">Dear Experts,<br><br></div><div class=3D"gmail_default" style=3D=
"font-family:tahoma,sans-serif">After upgrading to Ubuntu 15.10, I am exper=
iencing connection problems with openafs-client. Namely, I receive many mes=
sages in the syslog as below<br><br>afs: Lost contact with file server 188.=
184.14.76 in cell <a href=3D"http://cern.ch">cern.ch</a> (code -1) (all mul=
ti-homed ip addresses down for the server)<br><br></div><div class=3D"gmail=
_default" style=3D"font-family:tahoma,sans-serif">If I disconnect and recon=
nect again, the servers come back up and I can work, but after a few minute=
s it loses contact again. Strangely enough, this happens only when I am hom=
e, at the office I never see these issues. May I ask for your help in debug=
ging this issue?<br></div><div class=3D"gmail_default" style=3D"font-family=
:tahoma,sans-serif"><br>What I have tried so far:<br></div><div class=3D"gm=
ail_default" style=3D"font-family:tahoma,sans-serif">- Ping the server whic=
h appears to be down, the server responds without issues.<br></div><div cla=
ss=3D"gmail_default" style=3D"font-family:tahoma,sans-serif">- Connect to r=
outer at home both with cable and with wireless, the problem persists.<br><=
/div><div class=3D"gmail_default" style=3D"font-family:tahoma,sans-serif">-=
 Restart openafs-client and afsd, has no effect.<br></div><div class=3D"gma=
il_default" style=3D"font-family:tahoma,sans-serif">- fs checkservers repor=
ts a few servers down (like <a href=3D"http://afs263.cern.ch">afs263.cern.c=
h</a>), but I can ping them.<br><br></div><div class=3D"gmail_default" styl=
e=3D"font-family:tahoma,sans-serif">I am using openafs-client 1.6.14.1, Kub=
untu 15.10, kernel 4.2.0-19.<br><br></div><div class=3D"gmail_default" styl=
e=3D"font-family:tahoma,sans-serif">Please let me know what further informa=
tion I can provide.<br></div><div class=3D"gmail_default" style=3D"font-fam=
ily:tahoma,sans-serif">Thank you,<br></div><div class=3D"gmail_default" sty=
le=3D"font-family:tahoma,sans-serif">Orel<br></div></div>

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