We currently have a datacentre network and the backup traffic is contending with regular data.
I have created a seperate network interface on the DPM server and test server and allocated both servers with IP's on the regular and backup network.
As I still have all the other servers connecting to the DPM server on its hostname 'DPM-01' I created a new hostname for the same DPM server named 'DPM-01-BN' i.e. BackupNetwork within DNS.
When I try to reconfigure the backup agent on the test server to use the DPM-01-NB name I am given an error. I suspect it is due to the DPM server stating that the host name does not match.
If I add a host record to the test server which overrides the IP address for DPM-01 to the backup network then all is OK. I would prefer not to use host files