Alias name for non cluster master server implementation

Geeks !

We are planning to setup non-clustered master server and symantec recommends to crate an alias name for the master server so that it can be mapped to standy in case of DR.

We have not setup DNS yet as it is a new DC build and i am looking for option to do this using an host file.

Netbackup 7.5.0.6

OS sol 10

Please advise.

PB