Nico Williams wrote:
Whatever the size of an IP address, the number of routing table entries needed still needs to be kept below 2^35 (RAM) or so (2^40 with NVMe), no?
No. 8192 of rfc2374 is a reasonable number of routine table entries. To fully enjoy E2E transparency, where hosts are not less intelligent than routers, ordinary hosts should be able to have full routing table.
I've long felt that it would be much more scalable to route only based on AS (i.e., IP packets should have addresses, yes, but also src and dst AS numbers), and have an address->AS resolution protocol....
The problem is in current practice of multihoming by routing. See The Architecture of End to End Multihoming https://tools.ietf.org/html/draft-ohta-e2e-multihoming-05 for the solution. Masataka Ohta
