IPv6 Address Assignment to End Sites

1
IPv6 Address Assignment to End Sites

• Thomas Narten
• narten_at_us.ibm.com
• IETF 71
• Philadelphia, PA
• March 11, 2008

2
RFC 3177 IAB/IESG Recommendations on IPv6
Address Allocations to Sites

• Issued September, 2001
• /48 recommendation adopted by RIRs in 2002
• Subsequently, some very large allocations made
• RIRs began reviewing policy in 2005
• Continued unhappiness with one size fits all
  boundary
• SOHO and business sites get same amount of space
• Viewed especially wasteful for home users
• Revised both HD ratio and end site assignment
  size
• Now measure end site utilization in terms of /56s

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Goals of 3177bis

• Update 3177 based on where we are today
• Some of the arguments no longer hold
• Clarify what is architectural vs. operational
• Clarify the key motivations and principles behind
  original recommendation
• Reaffirm to RIRs key concerns
• End sites should get subnets, not just a /64
• Anticipate growth over longer period of time
• Renumbering into longer prefix is painful

4
3177bis History

• -00 issued July, 2005
• Fair amount of pushback on some particulars
• Significantly revised Nov. 2007 (-03)?
• Highlight concern of home sites getting /48
• Goals of 3177 can be met with /56
• But, document does not make a formal
  recommendation
• Actual selection of boundary is RIR policy
• Update 3177, but don't reclassify it as historic
• List the architectural issues with changing
  boundary
• Discussion on list generally supportive

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Next Steps

• Review the draft (6 pages) and comment on list
• Would like to see ID adopted as work item of
  v6ops (or 6man)?
• Ongoing discussion about best WG to own
• In any case, both WGs have interest
• Publish as RFC to update RFC 3177