"Gateway-Initiated" 6rd

Document Type Expired Internet-Draft (individual)
Authors Tina Tsou  , Cathy Zhou  , Tom Taylor  , Ole Trøan  , Qi Chen 
Last updated 2011-07-04
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This Internet-Draft is no longer active. A copy of the expired Internet-Draft can be found at


This document proposes an alternative 6rd deployment model to that of RFC 5969. The basic 6rd model allows IPv6 hosts to gain access to IPv6 networks across an IPv4 access network using 6-in-4 tunnels. 6rd requires support by a device (the 6rd-CE) on the customer site, which must also be assigned an IPv4 address. The alternative model described in this document initiates the 6-in-4 tunnels from an operator-owned gateway collocated with the operator's IPv4 network edge, rather than from customer equipment. The advantages of this approach is that it requires no modification to customer equipment and avoids assignment of IPv4 addresses to customer equipment. The latter point means less pressure on IPv4 addresses in a high-growth environment.


Tina Tsou (tena@huawei.com)
Cathy Zhou (cathyzhou@huawei.com)
Tom Taylor (tom111.taylor@bell.net)
Ole Trøan (ot@cisco.com)
Qi Chen (chenqi.0819@gmail.com)

(Note: The e-mail addresses provided for the authors of this Internet-Draft may no longer be valid.)