Low cost fail-2-wire circuit

A method, comprising:

• monitoring a power supply to a monitored networking device to detect an imminent power loss, wherein a port of the monitored networking device is connected to a bypass module;
• in response to detecting the imminent power loss, determining whether to bypass the monitored networking device;
• and
• in the event it is determined to bypass the monitored networking device, configuring an electromechanical relay in the bypass module to create a new connection associated with the port of the monitored networking device that bypasses the monitored networking device, wherein:
• the configured electromechanical relay maintains the new connection for at least some time after the imminent power loss;
• the bypass module further includes one or more bypass settings which in turn include a bypass enable that is set to TRUE in the event the monitored networking device is associated with a standby device in a software-defined wide area network (SD-WAN) and is set to FALSE in the event the monitored networking device is associated with an active device in the SD-WAN;
• and
• determining whether to bypass the monitored networking device is based at least in part on the bypass enable in the one or more bypass settings.

A system, comprising:

• a memory;
• and
• a processor coupled to the memory and configured to:
• monitor a power supply to a monitored networking device to detect an imminent power loss, wherein a port of the monitored networking device is connected to a bypass module;
• in in response to detecting the imminent power loss, determine whether to bypass the monitored networking device;
• and
• in the event it is determined to bypass the monitored networking device, configure an electromechanical relay in the bypass module to create a new connection associated with the port of the monitored networking device that bypasses the monitored networking device, wherein:
• the configured electromechanical relay maintains the new connection for at least some time after the imminent power loss;
• the bypass module further includes one or more bypass settings which in turn include:
• (1) a bypass enable and (2) a watchdog timer value;
• and
• determining whether to bypass the monitored networking device is based at least in part on:
• (1) the bypass enable in the one or more bypass settings and (2) a determination whether a watchdog timer associated with the watchdog timer value in the one or more bypass settings has expired.

A method, comprising:

• monitoring a power supply to a monitored networking device to detect an imminent power loss, wherein a port of the monitored networking device is connected to a bypass module;
• in response to detecting the imminent power loss, determining whether to bypass the monitored networking device;
• and
• in the event it is determined to bypass the monitored networking device, configuring an electromechanical relay in the bypass module to create a new connection associated with the port of the monitored networking device that bypasses the monitored networking device, wherein:
• the configured electromechanical relay maintains the new connection for at least some time after the imminent power loss;
• the bypass module further includes one or more bypass settings which in turn include:
• (1) a bypass enable and (2) a watchdog timer value;
• and
• determining whether to bypass the monitored networking device is based at least in part on:
• (1) the bypass enable in the one or more bypass settings and (2) a determination whether a watchdog timer associated with the watchdog timer value in the one or more bypass settings has expired.