[ppml] Policy Proposal 2004-3: Global Addresses for Private N etwork Inter-Connectivity

Randy Bush randy at psg.com
Tue Apr 6 14:59:32 EDT 2004

> It is unfair to the topic to restrict the discussion to MPLS
> VPNs,

then with what 10s of thousands of pe-ce subnets do you claim
experience and relevance?

> though the issue is fully present there also.  The problem is
> that multiple private interconnecting networks, regardless of the
> underlying technology, must interoperate.  A working IP address
> scheme among business partners, extranet customers, and
> application service customers is not practically supportable in
> these situations without globally unique IP addresses.
> Administering RFC-1918 space across multiple administrative
> domains is not feasible on any commercial scale.
> -----Original Message-----
> From: Randy Bush [mailto:randy at psg.com] 
> Sent: Monday, April 05, 2004 3:09 PM
> To: William Copeland
> Cc: 'Bill Darte'; 'Azinger, Marla'; ppml at arin.net
> Subject: RE: [ppml] Policy Proposal 2004-3: Global Addresses for Private N
> etwork Inter-Connectivity
> > To address the questions about the magnitude of private network numbering
> > and the process used to number them thus far: 
> > 
> > The authors of the proposal have first-hand knowledge of 10's of thousands
> > of PE-CE subnets that are numbered from globally unique address space.  
> > Given the growing popularity of private network interconnection, there are
> > perhaps 100's of thousands if not millions of such address assignments
> > today.  Also, and again from the author's view point, these assignments
> were
> > made with the full knowledge of and full disclosure to ARIN or its
> > representatives within our respective corporations.  The current rules of
> > ARIN, though a bit vague on the subject, have been interpreted thus far to
> > allow such assignments between private networks. 
> > 
> > Because the private network connections are quite complex and the networks
> > involved are quite large, the private address spaces employed by the
> various
> > agencies are often well populated.  To avoid any conflicting addresses, 
> > private network have turned to ARIN for permission to assign registered
> > space to the interconnecting networks only between such entities.  This
> > proposal seeks to codify in explicit language what has become operative
> > practice.
> huh?  i thought one of the big promises of 2547[bis] was that it
> handled vpns with the same overlapping private space.  now you
> want the world to bear the cost?  gimme a break.
> randy

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