Yes
It is awesome until you understand that most equipement expect a TCP or UDP header; Then, with IPv4x, they find none, and drop the packet;
Protocol ossification is a real thing and the main bane in this topic
It is awesome until you understand that most equipement expect a TCP or UDP header; Then, with IPv4x, they find none, and drop the packet;
Protocol ossification is a real thing and the main bane in this topic
Old routers would be a normal UDP packet inside a normal IPv4 and route it normally. New routers would detect UDP port 84 and treat it as an extended IPv4x packet.
I took all that out because I wasn't writing a proposal for something we should actually implement in the real world, but an alternate history "What if people who wanted IPv4 but with extra space got their way" and the story was already too long.