[arin-ppml] Change of Use and ARIN (was: Re: AFRINIC And The Stability Of The Internet Number Registry System)

Joe Maimon jmaimon at chl.com
Mon Sep 13 14:01:45 EDT 2021

Fernando Frediani wrote:
> I don't know who was the "genius" back in the past on network vendors 
> who embedded to not forward traffic for that amount of /8's market as 
> Future Use. I think that was one of the most disastrous decisions ever 
> made in this area of IP space.
> Using 240/4 on network equipment now a days is quiet easy, and stuff 
> has been fixed in both Network Equipment and Linux. However there are 
> other problems to be taken in consideration such as Network Operators 
> who hard coded filters on their Border Routers to not accept routes 
> from this range and mainly the legacy devices which will never get an 
> firmware upgrade to fix that. If I am not wrong Juniper routers 
> although they have fixed it they still come with the flag disabled by 
> default.
> One good thing that 240/4 could be easily used and properly assigned 
> to Autonomous Systems by the RIRs is to be used for Backbone 
> Addressing, so all the currently "more noble" Public IPv4 used for 
> backbone addressing could be reused for proper Global Routing and the 
> 240/4 for internal backbone addressing. In that way it is possible to 
> have proper Reverse DNS and also be used for peering between two 
> networks without risk of overlapping.
> Would it be IETF task to allocate all those /8's to the RIRs if that 
> would be considered ?
> Regards
> Fernando

You are even more correct now than were those back then tilting at this 
same windmill, with much of the same proposals.


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