The default keep alive packets from the media server were being sent every two hours, which is insufficient.
Things to Check
1> Make sure there is no firewall in between the Filers and the Netbackup Server.
If there is a Firewall in between then, Increase the idle socket timeout on the firewall to an interval that is either long enough to allow the backup script to complete or to allow TCP keepalives to be sent, i.e greater than 2 hours.
2> Decrease TCP keepalive settings on Master and Media Server and confirm that the settings are less than any idle socket timeout configured within the network
Please any one let me know if i need to change on the firewall how i can ???
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