North American Network Operators Group

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Re: 240/4

  • From: David Conrad
  • Date: Thu Oct 18 18:51:27 2007


On Oct 18, 2007, at 3:22 PM, Joe Greco wrote:
Fixing devices so that they can accept 240/4 is a software fix
that can be done with a binary patch and no additional memory.  And
there are a _lot_ of these devices.

Sure, I agree there are. How does that number compare to the number of
devices which can't or won't be upgraded to IPv4-240+?

I'm not sure what the problem is. If a machine isn't upgraded to support 240/4, then you can't talk to it. I would imagine an ISP could (for example) ensure its routers could handle 240/4 and then configure those routers to use 240/4 for their loopback addresses, thereby reducing that ISP's need of "regular" space (be it public or private).

If someone is suggesting IANA allocate 240/4 to the RIRs as "regular" /8s for subsequent allocations to ISPs or end users, they're deeply confused.