On Sat, Aug 17, 2019 at 8:29 PM Michael <mstjohns@xxxxxxxxxxx> wrote:
That was not very helpful useful informative responsive etc. how about identifying what you think is incorrect and why?
I think folk are more interested in being seen to be correct rather than making an argument. I also had someone 'correct' me when I pointed out that the lower 64 bits were to map to a MAC address which was in the process of being extended to 64 bits by being told that lower 64 bits were to map to a MAC address which had been extended to 64 bits
In practice we have 2^32 routable networks in the Internet because that is what BGP supports. We do not route on IP addresses, that hasn't happened since the earliest days of the net.
Whether packets have 256 bits of routing information (128 bit source + destination) or 128 is really not a major efficiency issue. Changing it would require an absurd amount of effort for no real gain.
What would make a major efficiency improvement is to use super jumbo frames. IP packets can be up to 64KB. Now that 1Gb/s networking is ubiquitous and 10Gb/s is on its way and memory is cheap, we should just bite the bullet and expand the MTU to minimize the amount of time routers have to spend doing switching.
