On Wed, 29 Jan 2014 14:16:43 -0800, Seth Mattinen wrote:
On 1/29/14, 14:01, Leslie Nobile wrote:
Additionally, ARIN has placed 23.128.0.0/10 in its reserves in
accordance with the policy "Dedicated IPv4 block to facilitate IPv6
Deployment" (NRPM 4.10). There have been no allocations made from
this block as of yet, however, once we do begin issuing from this
block, the minimum allocation size for this /10 will be a /28 and the
maximum allocation size will be a /24. You may wish to adjust any
filters you have in place accordingly.
I know ARIN doesn't care about routability and all that, but good
luck with those /28s.
"This block will be subject to a minimum size allocation of /28 and a
maximum size allocation of /24. ARIN should use sparse allocation when
possible within that /10 block."
Thanks for the initial sparse allocation for some time the /28 will be
the only tennant of the covering /24 so they will be able to advertise
the /24 aggregate as well as the /28. In time the reachability of the
/28s should improve and if some other /28 is allocated inside an already
populated /24 then as long as they can both see each other's /28s they
can still both advertise the /24 aggregate - or perhaps agree for a
common transit provider to do it. As acceptance of the /28s improves
further and less traffic flows to the aggregates, perhaps large
providers would agree to replace the customer /24 aggregates with a
single /10 aggregate to help out the (hopefully few) stragglers who
still filter /28s.
-Rob
