kb/sec speed is very slow on a Unix client during backup

Hi,

I have a unix client with the OS AIX Power system 770. When trying to run a backup, the kb/sec is slow and is fluctuating between 40 and 70 kb/sec. The client is running on a Solaris Netbackup Master and media server. Could this be a network issue on the client machine or data buffer tuning would required to be done on the media server. All the other backups on the clients running through this media server seem fine. If it is a network issue what setting would need to be checked or and also if a media server tuning would required to be done for a lot of clients getting affected with slow kb/sec rate what would be the solution for this ?

Please advise and help with your inputs.

Regards,
Nishath Sultana