Network interface settings
Make sure that your network connections are properly installed and configured.
Note the following:
Network interface cards (NICs) for NetBackup servers and clients must be set to full-duplex. Do not use Auto-sense or Auto-negotiate.
Both ends of each network cable (the NIC card and the switch) must be set identically as to speed and mode. (Both NIC and switch must be at full duplex.) Otherwise, link down, excessive or late collisions, and errors result.
If auto-negotiate is used, make sure that both ends of the connection are set at the same mode and speed.
In addition to NICs and switches, all routers must be set to full duplex.
Using AUTOSENSE may cause network problems and performance issues.
Consult the operating system documentation for instructions on how to determine and change the NIC settings.
If multiple switches are needed to meet the network need for a single NetBackup domain, methods are available to combine multiple switches including stacking, trunking, and uplinks.
Consider network bonding to join multiple network interfaces into a single interface to increase network bandwidth on a single interface and improve redundancy.
For 10 gigabit or faster network connections, consider implementing jumbo frames. Be aware that jumbo frames must be supported through all devices in the data transfer paths. Consult with your networking team about the use of jumbo frames in your environment.