We are using Novell client 4.91 and a Cisco 3000 concentrator with Cisco
VPN client 4.6. When a user logins into the VPN concentrator there is a
lag time of 3 to 6 minutes before the tree/server can be found. If the
user tries to login with the Novell client they receive the message "Tree
or server cannot be found". We have tried to used the IP address and
Name, niether stops this poblem. If they wait five minutes they login in
with no problem.

Is there some setting on the concentrator or client that I am missing?

We do have the IP address in the Directory Agent List (static selected).