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@cks Reason people use DHCP-PD instead of a real routing protocol is it’s mostly zero human knowledge required for deploying a router for the delegated prefixes. You just plug it into the network, and it gets a prefix and routes for it. All the headaches are with the integration of the DHCP server with the actual routing protocol. This is why CableLabs and other insisted on building it that way, and it’s also why it’s a giant headache and doesn’t work well in any kind of generalized way. (We tried to fix it in the HOMENET working group in IETF, but the effort exploded in the worst kind of IETF stupidity that I still can’t discuss without anesthesia and muscle relaxants.)