The ipfwd state engine allows uni-directional IP traffic of a certain IP type. The data can only flow in the forward direction (From to To address).
The discriminator for the ipfwd state engine is the IP packet type.
The ipfwd state engine has the following parameters:
Cache timeout in seconds - Specifies the amount of time before the system forgets about IP traffic between a pair of hosts. Default is 60 seconds.
Flag value - Must be 1.