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To: "Dragan Matic" <gekko,AT,eunet,DOT,yu>
Subject: Re: cipe kills our wireless link
From: "Hans Steegers" <hsx,AT,dds,DOT,nl>
Date: Thu, 4 Sep 2003 15:59:35 +0200
Cc: <cipe-l,AT,inka,DOT,de>
Reply-to: "Hans Steegers" <steegers,AT,steegers,DOT,nl>

I doubt CIPE is causing this. To me it looks more like a driver problem of
the wireless adapter. The traffic you see is possibly traffic from the
remote accross the link. Looks like the link is not completely dead.
Or for the paranoid: maybe another wireless is spying or trying to take over
your tunnel! Call the feds!

For the customer you could implement something to recover automatically if
the link is down: run a script to down en up eth0 and the link is restored,
so the customer is happy and you can investigate this further.

Run CIPE in debug mode or run a debug version of CIPE and examine the logs
for clues.
Do the same for the Wireless adapter if possible. Check the mailing list as
well if one exists.

If you want help, you need to provide more precise information and not start
to  blame CIPE without solid evidence.

Hans Steegers

-----Original Message-----
From: Dragan Matic <gekko,AT,eunet,DOT,yu>
To: cipe-l,AT,inka,DOT,de <cipe-l,AT,inka,DOT,de>
Date: Thursday, September 04, 2003 10:15 AM
Subject: cipe kills our wireless link

>We have a wireless internet link and one of our big customers use cipe
>to approach our network. The problem is that at random - especially
>after transfering large amount of data (few hundred megabytes through
>smb access), and only when cipe adapter is active - wireless link just
>dies. It cannot ping the access point, and the computer that it is in -
>the router (IBM pIII 450/128mb) - slows down. Running ethereal shows
>there is traffic going on on UDP port 7771 (the port cipcb0 is on), and
>that goes on even after shutting down cipcb0! If I kill eth1 (wireless
>card connected to internet) and bring it up again, everything goes back
>to normal. I really do not understand how can I still have traffic on
>port 7771 when cipe adapter is down. And the problem is really difficult
>to reproduce because it happens at random. Any suggestions? Tnx in advance.
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