Watchdog Timer

To detect internal problems and recover from unexpected inputs, the NMC uses a watchdog timer. If the NMC does not receive any network traffic for 9.5 minutes, the NMC assumes that there is a problem with its network interface and restarts. When the NMC restarts because of the watchdog timer it is recorded in the event log as “System: Network interface restarted”.

How to Reset the Watchdog Timer

To make sure that the NMC does not restart if the network is quite for 9.5 minutes the NMC attempts to contact the default gateway every 4.5 minute. If the default gateway is available and responds the watchdog timer is reset.

If your application does not have or does not require a default gateway it is possible to specify an IP address of a computer instead as the gateway. The computer needs to be on the same network and subnet as the NMC. In this case the network traffic from the computer will reset the watchdog timer on the NMC.

To change the default gateway:

• From the CLI type -tcpip —g or -tcpip6 —g followed by the computer’s IP address. Press Enter to confirm the change.

• From the web interface navigate to Configuration > Network > TCP/IP > IPv4 (or IPv6) and enter the computer’s IP address in the default gateway field. Click Apply to save the changes.