A device that doesn't understand your newly invented addressing scheme would need to rely on some other intermediate device in order to get traffic to an endpoint that does support your new scheme.
You're using different words, but you've got a separate addressing scheme, and dependence on proxies to enable everyone to talk to each other. This is exactly where we are with IPv6.
> You could instead move this "port" directly into IP header in backward-compatible way
If you're changing the meaning of the headers, it is by definition not backwards compatible.
You're using different words, but you've got a separate addressing scheme, and dependence on proxies to enable everyone to talk to each other. This is exactly where we are with IPv6.
> You could instead move this "port" directly into IP header in backward-compatible way
If you're changing the meaning of the headers, it is by definition not backwards compatible.