[ppml] Draft 2 of proposal for ip assignment with sponsorship

Forrest forrest at almighty.c64.org
Fri Feb 28 09:27:56 EST 2003

On Thu, 27 Feb 2003, Alec H. Peterson wrote:

> --On Thursday, February 27, 2003 4:41 PM -0800 william at elan.net wrote:
> > I have not missed this point, in fact I already made a draft available in
> > separate email to this list for proposal that would require ARIN to make
> > micro-assignments from specific class-A and in fact to try to keep size
> > of  assignments about the same for each /8 ARIN has and make information
> > about this size of smallest announement for each /8 publicly available
> > (to be  fair they already provide this information on website even now).
> > I also  argued before against what are otherwise fairly good proposals
> > 2002-5 and  2002-6 on the grounds that they do not include provision that
> > when changing to smaller size block then /20 ISPs must get allocated
> > space from /8 block here other micro-allocations are also being made and
> > where ISPs do not  filter it on /20 boundary.
> But regardless of where the allocations come from, there will still be lots 
> of allocations that cannot be summarized that otherwise could be summarized.

If you get a /24 from one of your upstreams, your /24 is part of your 
ISP's larger aggregate.  The people arguing routing table explosion caused 
by a micro allocation policy seem to take the stance that they can filter 
your /24 from your ISP's aggregate and you'll be fine because they'll 
still have a route to you via that aggregate.  If you receive a micro 
allocation they will no longer be able to filter your /24.  

If you filter my /24 from my provider's aggregate, what exactly is the 
point of me multihoming?   If I lose connectivity with that upstream, 
you'll no longer be able to reach me because you won't hear my /24 
announcement from my other upstream.  To me, it doesn't seem acceptable 
to filter out multihoming /24's at all.  Creating a micro allocation 
policy would seem to address this issue.  Create a block of addresses that 
/24's won't get filtered from, while still allowing everyone to filter out 
the garbage more specific /24's from elsewhere.  


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