rpcbind errors

HI,

During the system bootup, following errors are being logged in "syslog"

i) unix1 rpcbind: netdir_getbyname failed on tcp for host unix1, se
rvice rpcbind

ii)unix1 rpcbind: netdir_getbyname failed on udp for host unix1, se
rvice rpcbind

iii)unix1 in.snmpd[942]: unix1: Host unknown.

iv) unix1 rpcbind: Found 2 errors with network configuration files.
Continuing.

Any help to resolve these errors would be higly appreciated.

Regards,
Tayyab