[arin-ppml] Lower End User IPv4 threshold to /24

Owen DeLong owen at delong.com
Mon Aug 3 15:42:08 EDT 2009


TEMPLATE: ARIN-POLICY-PROPOSAL-TEMPLATE-2.0

1.      Policy Proposal Name: /24 End User Minimum Allocation Unit
2.      Proposal Originator
         a.      name: Owen DeLong
         b.      email: owen at delong.com
         c.      telephone: 408-890-7992
         d.      organization: Hurricane Electric
3.      Proposal Version: 0.9
4.      Date: 8/3/09
5.      Proposal type: new
6.      Policy term: permanent
7.      Policy statement:

	Replace section 4.3.2.2 of the NRPM with the following:

	4.3.2.2 Multihomed Connection

	For end-users who demonstrate an intent to announce the requested  
space in a
	multihomed fashion to two or more distinct providers, the minimum  
block of IP
	address space assigned is a /24. If assignments smaller than a /24  
are needed,
	multihomed end-users should contact their upstream providers. When  
prefixes are
	assigned which are longer than /20, they will be from a block  
reserved for that
	purpose so long as that is feasible. End-users may not receive a  
block smaller
	than /22 under this policy if they already have resources from ARIN,  
except as
	specified in section 4.3.6.2.

	Renumber the existing paragraph under the 4.3.6 to

	4.3.6.1 Utilization requirements for additional Assignment

	Add the following paragraph 4.3.6.2

	4.3.6.2	Replacement assignments for small multi-homers

	Any end-user that possesses an assignment smaller than /22 under any  
part of
	section 4.3 shall not be able to get an additional assignment unless  
they agree
	to return all existing assignments within 12 months of receiving a  
new assignment.
	The new assignment shall be sized to accommodate their existing  
utilization in
	addition to their justified additional growth space under section  
4.3.6.1.
	The common cases for this are expected to be a /24 returned after  
receipt of a /23,
	or a /23 returned after receipt of a /22.

8.      Rationale:

	This policy attempts to incorporate the recent and historical  
discussions of
	policy for multi-home users on PPML. The intent is to provide as fair  
a process
	as possible for multi-homed organizations down to the smallest  
feasible size
	while still preserving some control over growth in the routing table.

	It has been repeatedly noted that /24 multi-homers exist today with  
PA space
	and still occupy a routing table slot, so, it is unlikely that moving  
this
	boundary to /24 would significantly impact the routing table.

	By requiring smaller assignments to renumber and return, rather than  
add more
	small blocks to their assignments, this policy seeks to further  
reduce the
	chances of unnecessary growth in the routing table and encourage good  
aggregation
	where possible.

9.      Timetable for implementation: Immediate

END OF TEMPLATE

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