IP Tunnels in the Internet Architecture

The information below is for an old version of the document
Document Type Expired Internet-Draft (intarea WG)
Last updated 2019-01-20 (latest revision 2018-07-19)
Replaces draft-touch-intarea-tunnels
Stream IETF
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Expired & archived
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This Internet-Draft is no longer active. A copy of the expired Internet-Draft can be found at


This document discusses the role of IP tunnels in the Internet architecture. An IP tunnel transits IP datagrams as payloads in non- link layer protocols. This document explains the relationship of IP tunnels to existing protocol layers and the challenges in supporting IP tunneling, based on the equivalence of tunnels to links. The implications of this document are used to derive recommendations that update MTU and fragment issues in RFC 4459.


Joseph Touch (touch@strayalpha.com)
Mark Townsley (townsley@cisco.com)

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