This feature is used with the Multiple Default Gateway feature. When the current default gateway goes offline, this feature detects the failure and automatically enables the next preferred default gateway from the Multiple Default Gateway list to act as the current default gateway. When a dead default gateway with a higher preference is again online, this feature detects this and switches back to the default gateway with the higher preference.
For more information, see Enabling Dead Gateway Detection and Configuring Dead Gateway Detection.
This configured parameter lets you fine-tune the performance of the Dead Gateway Detection feature by modifying the time interval (in seconds) at which probes are sent to the default gateway to determine whether it is functional.
For more information, see Configuring the Probe Interval.
This configured parameter sets the time interval (in seconds) after which the next probe is sent to the default gateway when no reply is received by the gateway for the previously sent probe.
For more information, see Configuring Probe Timeout.