When you configure the hostname resolution in the /etc/nsswitch.conf file for HA hosts, the key word files must
appear first in the "hosts line" because:
Using the /etc/hostsfile
for hostname resolution
is more reliable than using DNS
or NIS or both.
An HA Screen in the passive mode cannot send packets over
the network; therefore, remote hostname resolution, such as DNS or NIS, will
fail for passive HA Screens.
