The ping state engine is used for an ICMP ping exchange. It allows ping requests in the forward direction and ping responses in the reverse direction.
The discriminator of the ping state engine is the ICMP type of the request packet. This is normally set to 8 to match that of an ICMP echo request packet.
The ping state engine has one parameter:
Response timeout in seconds - Specifies the amount of time to wait for ICMP echo responses (default is 10 seconds).