On a fresh network install of five SLES10 servers with OES2, some of my
clients cannot find the tree.

srv1 = DA
srv 2-5 were pointed to srv1 during the install.
srv 2-5 are on separate subnets.

In dhcp, I am pushing out option 78.

Host can find the tree perfectly when on the same subnet as srv1.

Question 1: Was I correct in pointing servers 2.-5 at the DA server (srv1)?
Question 2: What is the command to restart slpda on OES2 SLES10?
Question 3: Is there a troubleshooting document I can reference?