login problem with nfs disks

[cssjo at cc.newcastle.edu.au]

	Any help to the following problem would be much appreciated.
We have a number of suns of various sorts ( 3/60 , 3/80 , sparcs , ... )
all of which NFS mount filesystems off each other. The problem is that when
one machine goes down anyone trying to login to a machine which mounts a disk
off the dead machine can't. It just hangs. We think the problem is in login !

	Any ideas on this or the location of the source for login would be 
helpful.

The machines are mostly suns running either SunOS 4.1 or 4.1.1 !


Thanks
owie at cs.newcastle.edu.au
University of Newcastle,
Australia.