roaming questions

Bram Van Steenlandt bulkmail at
Mon Oct 1 07:54:57 PDT 2007

Hi list,

I have setup a mobile pc to roam across our building.
By reducing the dwell time and changing the channel list to only the 
channels I use roaming now works within ten seconds en sometimes within 
one or two seconds.
The previous configuration was with fedora and there I was unable to get 
roaming time under 25 seconds.

I do have one very annoying problem however and I have no idea how to 
solve it.
The software uses psycopg (a python postgresql module) wich uses the 
standard system parameters for connections (At least that is what I think).
-On fedora if the connection gets lost and it takes 30 seconds to remake 
a new connection operation is not interupted, after the 30 seconds you 
get the data you've been waiting for.
-On freebsd however we get it a lot that the connection is "lost", you 
can easily start a new connection wich works fine, but the old 
connection you wore using stops working and the app. hangs (If I had to 
guess I would say that roaming works about 95% of the time and the 
connection is lost about 5% of the time).

I also get a lot of IFDOWN IFUP messages but this seems normal to me.

Is there some way to tune sysctl values so that it doesn't lose the 
connection or how should I proceed in debugging this problem ?

Sorry about my poor english

Tkanks in advance

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