NetBackup requirements for inter-host communication
Beginning with the 8.1 release, NetBackup inter-host communication requires the following:
The NetBackup master server must be up and running.
The NetBackup vnetd process and its proxy processes must be active on all NetBackup 8.1 and later hosts.
For more information, see the vnetd process description in the 8.1 version of the NetBackup Administrator's Guide, Volume I. Also see the NetBackup Troubleshooting Guide for information about troubleshooting the vnetd proxy processes. The guides are available through the following URL:
NetBackup 8.1 hosts no longer use the connect option settings for connections to other NetBackup hosts, including the daemon port setting. The PBX and vnetd ports must be open to the remote hosts.
Veritas recommends that you know about and accommodate the following when you upgrade to NetBackup 8.1:
Each inter-host connection uses an intra-host connection on each of the hosts. The local connections consume additional TCP ports and TCP memory. NetBackup server hosts that are already at or near their resource limits may need to be tuned.
The inter-host connections that carry control protocol information are encrypted. CPUs with AES/AES-NI or RDRAND/SecureKey features can offload this workload.