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Re: The Implications of 6rd and ARIN 2010-9

2010-10-12 20:05:47

"Mark" == Mark Andrews <marka(_at_)isc(_dot_)org> writes:
    Mark> In message
    Mark> <992DF93E-1EFB-4D68-BDD7-D5C7BE02FC01(_at_)americafree(_dot_)tv>,
    Mark> Marshall Euba nks writes:
    >> Hello;
    >> 
    >> I think that people here would be interested in (and likely
    >> concerned by) the ARIN 2010-9 proposal :
    >> 
    >> https://www.arin.net/policy/proposals/2010_9.html
    >> 
    >> "On 15 July 2010 the ARIN Advisory Council (AC) selected "IPv6
    >> for 6rd" as a draft policy for adoption discussion on the PPML
    >> and at the Public Policy Meeting in Atlanta in October.
    >> 
    >> IPv6 for 6rd
    >> 
    >> 6rd is an incremental method for Service Providers to deploy
    >> IPv6, defined in the IETF Standards Track RFC 5969. 6rd has been
    >> used successfully by a number of service providers to deploy IPv6
    >> based on automatic IPv6 prefix delegation and tunneling over
    >> existing IPv4 infrastructure. .... "
    >> 
    >> What worries me (and others) is that to give end users an IPv6
    >> /56 will generally require the assignments as short as /24s to
    >> ISPs, due to the encapsulation of v4 addresses inside of v6
    >> addresses :
    >> 
    >> "The 6rd prefix is an RIR delegated IPv6 prefix. It must
    >> encapsulate an IPv4 address and must be short enough so that a
    >> /56 or /60 can be given to subscribers."
    >> 
    >> 56 - 32 = a /24

    Mark> Only a naive deployment of 6rd would do this.

    Mark> If you deploy a 6rd prefix per IPv4 prefix you have allocated
    Mark> and set appropriate IPv4 mask lengths in your DHCP replies to

I tried to raise this point in April at the ARIN meeting, but it wasn't
understood. 

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