strange resolver behavior on Solaris 8 client

[bob_a_booie]

Here is my situation  :
I have 2 solaris hosts running same version of solaris 8
and identical /etc/resolv.conf and and on the same phsyical network and
subnet. Both are V120

Why would Solaris hosts with identical resolver settings
on the same network behave differently ?

Host serverb will take at least 15 minutes for any dynamic updates
to resolve correctly via ping or nslookup.

Host servera will take no more then 2 minutes for any dynamic updates
to resolve correctly via ping or nslookup.


Are there any particular environment settings
that can cause this ?

Unfortunatley serverb is a centralized  location for rsyncing
data and distributing software ...

TIA