This read-create object stores the ifIndex of the physical port or link aggregation group that provides the connection leading to a configured Web Cache device. An admin sets this value when manual cache configuration is used, since it maps a cache table entry to the actual interface used to reach that cache; the default value of 0 means no port has been assigned. For example, an admin configuring a cache reachable through an interface with ifIndex 5 would set hh3cL4RedirectCachePort to 5 for that cache's row.