Simple IPv6-in-IPv4 Tunnel Establishment Procedure (STEP)

Document Type Expired Internet-Draft (individual)
Last updated 2004-01-29
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This Internet-Draft is no longer active. A copy of the expired Internet-Draft can be found at


This memo describes a set of operational procedures, a UDP encapsulation for configured tunnels, and one implementation mechanism to provide a very simple and straightforward way to easily manage IPv6-over-IPv4 configured tunnels between an ISP and a customer. The configured tunnels work even if the IPv4 addresses change dynamically, or are private addresses; the procedure provides at least a /64 prefix per customer and requires no administrative set-up. NAT traversal is also supported.


Pekka Savola (

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