arla doesn't realize network is back up

[brians+@yardarm.fac.cs.cmu.edu]

Sometimes, when I've been using arla for a while and the (dial-up) connection
goes down, and I bring it back up, arla doesn't seem to notice that the 
connection is back up.  It seems to "cache" that certain files have a status
of "Network is down".  I've tried unmounting /afs, killing arlad and rmmod-ing
xfs and deleting /usr/arla/cache/* and that actually seems to make the situation
worse.  At that point the only thing that seems to fix it is leaving the arla
client off for about 15 minutes for some sort of cache (which I can't find) to
expire.  
So, my question is, when the connection goes down and comes back up, is there
some straightforward way of telling arla to start from scratch entirely as
if it was started from the first time?