I have been working a bit with migrating a Data Protector cell manager, when moving a client i recieved the following error:
[Critical] From: BDA-NET@ " [/boot]" Time: 02.09.2011 09:08:03 Cannot connect to Media Agent on system , port 49708 (IPC Invalid Hostname or IP Address System error: HOST_NOT_FOUND) => aborting.
The cause for this was that the client could not look up the cell manager. I solved this by simply adding the cell manager in the hosts file of the client. You can verify this problem by simply doing a ping or nslookup against the cell manager, from the client itself.