exchange 2010 dag backup failure

i have a solaris 10 master and windows 2008 r2 media server. 2 exchange 2010 clients forming a dag.. All the servers and clients are on nbu 7.1.0.3
The master and media servers are installed using the backup interface name while the policy needs to be configured using the prod name of dag. While running backup i can see job details showing bpbrm started however i dont see the process on the media server nor is there any logs generated. The job eventually fails with error 58 and final error code 26. The name resolution works as expected and even nbdna does not show any errors.