This read-create object defines the MAC address of the Web Cache device attached on the port specified by hh3cL4RedirectCachePort. It must be supplied when the device only supports manual cache configuration, so the switch knows exactly which physical device on that link to redirect traffic to at Layer 2; the default value is 0 (unset). For instance, an admin manually pairing a cache appliance with MAC 00:0F:E2:11:22:33 to a redirection port would set hh3cL4RedirectCacheMacAddress to that value on the corresponding table row.