On Sun, Oct 24, 2021 at 11:48 PM Mark Smith <[email protected]> wrote:
> Subnet masks weren't a good idea either. They, like classes and CIDR, are > hacks to squeeze more addresses out of the 32 bit IPv4 address space. > > Have a look at the IPv4 address structure in RFC760. Couldn't be simpler. > Simplicity often goes against scalability. I am afraid CIDR and VLSM is not about squeezing anything. Thay are all about improving scaling of both data plane and control plane in IP routing architecture. But if you claim that subnet masks were not a "good idea either" then are you suggesting we should propagate reachability globally using host routes and exact match at each transit hop ? Thx, R.
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