Page History

...

Each Link Monitor that is configured can also be configured with unique values for the Verify Timer, Response Timer, Reattempt Timer, and Maximum Retries. If configured, these values override the values configured for the Link Detection Group.

Each Link Monitor will set a timer while waiting to perform its next verification. The timeout for this timer is based on the configured Verify Timer value. When a ping is in progress and the Link Monitor is awaiting the response from the destination, a timer is set based on the configured Response Timer value. When the response times out and the Link Monitor retries, the Reattempt Timer value is used while waiting for the response.

When the number of consecutive failures reaches the Maximum Retries value, the Link Monitor considers the link verification as failed and reports this to its Link Detection Group.

While in the failed state, the Link Monitor will continue to attempt to ping the destination so that the failed condition can eventually clear. This is done at the rate specified by the Verify Timer.

The Link Monitor also supports a NULL destination (0.0.0.0), which disables the link verification for that interface. The interface is still considered failed if there is a hardware failurefailure.

Link Monitor verifies transport on a specific interface via Layer 3 ICMP/ARP/NUD to a specific destination or monitors MII state for the physical port, where MII is defined as “Media Independent Interface”.

...

...