This read-create object holds the number of bits (1 to 32) in the subnet mask applied to the corresponding exclusion table entry's IP address to determine the subnetwork excluded from Web Cache redirection. An admin uses this together with the excluded IP address to exclude either a single host (mask length 32, the default) or an entire subnet from being redirected to the cache. For example, setting the IP address to 192.168.5.0 and hh3cL4RedirectIpExclusionMaskLen to 24 excludes the whole 192.168.5.0/24 subnet from cache redirection.