Alternate Tunnel Encapsulation for Data Frames in CAPWAP
draft-ietf-opsawg-capwap-alt-tunnel-01

The information below is for an old version of the document
Document Type Active Internet-Draft (opsawg WG)
Last updated 2014-08-27 (latest revision 2014-07-25)
Replaces draft-zhang-opsawg-capwap-cds
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Network Working Group                                           R. Zhang
Internet-Draft                                             China Telecom
Intended status: Standards Track                                  Z. Cao
Expires: January 26, 2015                                        H. Deng
                                                            China Mobile
                                                           R. Pazhyannur
                                                           S. Gundavelli
                                                                   Cisco
                                                                  L. Xue
                                                                  Huawei
                                                           July 25, 2014

        Alternate Tunnel Encapsulation for Data Frames in CAPWAP
                 draft-ietf-opsawg-capwap-alt-tunnel-01

Abstract

   CAPWAP defines a specification to encapsulate a station's data frames
   between the Wireless Transmission Point (WTP) and Access Controller
   (AC) using CAPWAP.  Specifically, the station's IEEE 802.11 data
   frames can be either locally bridged or tunneled to the AC.  When
   tunneled, a CAPWAP data channel is used for tunneling.  In many
   deployments it is desirable to encapsulate date frames to an entity
   different from the AC for example to an Access Router (AR).  Further,
   it may also be desirable to use different tunnel encapsulations to
   carry the stations' data frames.  This document provides a
   specification for this and refers to it as Alternate tunnel
   encapsulation.  The Alternate tunnel encapsulation allows 1) the WTP
   to tunnel non-management data frames to an endpoint different from
   the AC and 2) the WTP to tunnel using one of many known encapsulation
   types such as IP-IP, IP-GRE, CAPWAP.  The WTP may advertise support
   for Alternate tunnel encapsulation during the discovery or join
   process and AC may select one of the supported Alternate Tunnel
   encapsulation types while configuring the WTP.

Status of This Memo

   This Internet-Draft is submitted in full conformance with the
   provisions of BCP 78 and BCP 79.

   Internet-Drafts are working documents of the Internet Engineering
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Zhang, et al.           Expires January 26, 2015                [Page 1]
Internet-Draft              Alternate Tunnel                   July 2014

   time.  It is inappropriate to use Internet-Drafts as reference
   material or to cite them other than as "work in progress."

   This Internet-Draft will expire on January 26, 2015.

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Table of Contents

   1.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . .   2
     1.1.  Conventions used in this document . . . . . . . . . . . .   5
     1.2.  Terminology . . . . . . . . . . . . . . . . . . . . . . .   5
   2.  Alternate Tunnel Encapsulation  . . . . . . . . . . . . . . .   6
     2.1.  Description . . . . . . . . . . . . . . . . . . . . . . .   6
   3.  Protocol Considerations . . . . . . . . . . . . . . . . . . .   8
     3.1.  Supported Alternate Tunnel Encapsulations . . . . . . . .   8
     3.2.   Alternate Tunnel Encapsulations Type . . . . . . . . . .   8
     3.3.   IEEE 802.11 WTP Alternate Tunnel Failure Indication  . .  10
   4.  IANA Considerations . . . . . . . . . . . . . . . . . . . . .  10
   5.  Security Considerations . . . . . . . . . . . . . . . . . . .  11
   6.  Contributors  . . . . . . . . . . . . . . . . . . . . . . . .  11
   7.  References  . . . . . . . . . . . . . . . . . . . . . . . . .  11
     7.1.  Normative References  . . . . . . . . . . . . . . . . . .  11
     7.2.  Informative References  . . . . . . . . . . . . . . . . .  12
   Authors' Addresses  . . . . . . . . . . . . . . . . . . . . . . .  12
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