I want to configure the client sub-mask to be 255.255.255.255 when allocating a DHCP IP address from a network with a mask of 255.255.255.128. This seems to be option 1, according to all docs, and the syntax should be quite simple "option 1 hex FF:FF:FF:FF". However, IOS hiccups, saying "DHCP, no raw value option 1". What is that all about? I don't know what "raw value" is or what the alternatives are. I've gone through every reference site that I can think of, and am still in the dark. Any clues as to how to achieve the goal?