IPv4 Countdown Plan
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Transcript of IPv4 Countdown Plan
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IPv4 Countdown PlanLeslie Nobile
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Phased Approach• Phase 1 – Current phase,
initiated with ARIN’s last /8 from IANA
• Phase 2 – Begins when 3 /8 equivalents remain
• Phase 3 – Begins when 2 /8 equivalents remain
• Phase 4 – Begins when 1 /8 equivalent remains
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Variables• Some IPv4 space may be returned to
IANA in accordance with global policy• New policies and/or larger requests
could change intended plans and lead to faster depletion of IPv4 available pool
• Waiting list could kick in during any phase depending on available inventory
• 2 day turnaround may not always be possible as we move further into depletion planning
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Phase 1• Went into effect in Feb. 2011 when
ARIN received its last /8 from IANA– 3 month allocation window– All requests peer reviewed; larger blocks
require sign off by senior analyst and/or department director
– Space needed for various policies has been reserved and pulled from inventory
– Returned, reclaimed, and revoked blocks held for 6 months
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Phase 2• Begins at 3 /8 equivalents– Team review by senior analysts kicks in for /16
and larger requests– First in, first out (by date and time stamp)
• Applies to both initial requests and responses– Once approved, recipient has 45 days to
complete payment and/or RSA• Space will be released back to available pool on
the 46th day if not complete– Returned, reclaimed, and revoked blocks now
held for 3 months– Peer review continues; Director sign off required
on larger requests
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Phase 3• Begins at 2 /8 equivalents– No external changes; staff will examine
current processes to ensure they are working and modify as needed
– Continue 3 month hold on returns, revokes, and reclaims
– Peer review continues; Director sign off required on larger requests
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Phase 4• Begins at 1 /8 equivalent– First in, first out by date and time stamp
will apply to all requests of any size– All requests will be team reviewed– The “hold” bucket will cease to exist – all
returned, revoked, and reclaimed space will go directly into available inventory• Staff will continue to check
routing/filtering on space to be issued and will notify recipient if there are issues
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