1. An apparatus comprising: logic to store entries in a flow cache; logic to invalidate entries in the flow cache in part by increasing a time incrementing variable by a large increment; logic to retrieve an entry from the flow cache in part in response to receipt of a packet; logic to set a current time variable for the entry to be a sum of a current system time and the time incrementing variable; and logic to determine whether the entry is valid in part based on the current time variable exceeding the expiration time of the entry.