This table consists of a list of configuration for the PD alive check function for ports. The PD alive check feature provides the solution for PD device that has the stop working or no response problem via Ping mechanism. Detailed Process: The detailed processes are described as follows: 1. The system needs to periodically monitor the specific PD by using Ping function. If there is no response, system takes one of the following actions: (1) Reset: Switch resets (disable then enable) PoE power on the port which connects to a PD under monitoring. (2) Notify: Switch sends logs and traps to notify the administrator. (3) Both: Switch sends logs and traps, and resets the PoE port power. 2. The system should implement the retry mechanism to check PD aliveness, hence the system will reset the PoE port power feeding after the retry by using Ping without any response from a PD. 3. If the action is Reset or Both, the system needs to wait for PD recovery from rebooting and then executes the Ping function again. Besides, the waiting time can be configured by users. 4. If PoE schedule (time range) function is configured on the port which enables the PD Alive Check function, the time range function has the top priority, and therefore PD Alive Check function will not work while PoE time range function is still active. 5. This function only takes effect on PoE enabled port with power feeding. Note: It is required to setup IP settings properly that the PD can be reachable for Ping, otherwise this function cannot work as expected. Limitation 1. Support Ping Function: If the PD does not support ICMP, this function cannot work normally. 2. Direct-Connected PD: The Reset Action can only work on the direct-connected PD. If the PD is not connected directly, the Reset Action may not work as expected. 3. PD Also Acts as PSE: If the direct-connected PD is also a PSE, all the next level PDs connect to this PSE will be power cycling whenever PD Alive Check function takes effect on 'Reset' or 'Both' Action.