Interconnecting Network Sites by IP Tunnels
draft-yong-intarea-inter-sites-over-tunnels-00

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Last updated 2016-10-31
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Network Working Group                                           L. Yong
Internet-Draft                                                L. Dunbar
Intended status: BCP                                             Huawei
                                                             T. Herbert
                                                               Facebook

Expires: April 2017                                    October 31, 2016

               Interconnecting Network Sites by IP Tunnels
            draft-yong-intarea-inter-sites-over-tunnels-00.txt

Abstract

   This document specifies use of a set of IP tunnels to interconnect
   multiple network sites over IP backbone networks. The interconnected
   network sites form 'virtual' private network(s). The networks at any
   of those sites can be Layer 2 domains or/and Layer 3 subnets. The IP
   backbone networks that the tunnels traverse through can be IPv4 or
   IPv6. This document describes the special property (or features)
   that those IP tunnels need to have in order to interconnect multiple
   sites as if those sites are directly connected by wires.

Status of This Document

   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
   Task Force (IETF). Note that other groups may also distribute
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   at any time. It is inappropriate to use Internet-Drafts as reference
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   This Internet-Draft will expire on April 31, 2017.

Copyright Notice

   Copyright (c) 2016 IETF Trust and the persons identified as the
   document authors.  All rights reserved.

Yong, et al.                                                   [Page 1]
Internet-Draft      Sites Interconnection by Tunnels        October 2016

   This document is subject to BCP 78 and the IETF Trust's Legal
   Provisions Relating to IETF Documents
   (http://trustee.ietf.org/license-info) in effect on the date of
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Table of Contents

   1. Introduction...................................................3
      1.1. Motivation of sites interconnection by IP tunnels.........3
   2. Terminology....................................................4
      2.1. Requirements language.....................................4
      2.2. Terms defined in this document............................5
   3. Sites interconnection solution architecture....................5
   4. Key properties of sites interconnection over IP tunnels........7
      4.1. Network sites interconnection properties..................7
      4.2. Tunnel transport properties for sites interconnection.....8
   5. Site traffic encapsulation.....................................9
   6. Tunneling multicast and broadcast traffic......................9
   7. Tunnel transport over IP.......................................9
      7.1. Tunnel transport mode.....................................9
      7.2. MTU and fragmentation....................................10
      7.3. Checksum.................................................10
      7.4. Congestion management....................................10
         7.4.1. Congestion detection................................10
         7.4.2. Congestion notification.............................10
         7.4.3. Tunnel ingress traffic control......................10
      7.5. Tunnel traffic hop count and DSCP value setting..........10
      7.6. Middle box considerations................................10
   8. Sites interconnection security................................10
   9. Tunnel configuration..........................................11
   10. Tunnel tools.................................................11
   11. Operational considerations...................................11
   12. IANA considerations..........................................11
   13. Security considerations......................................11
   14. References...................................................11
      14.1. Normative References....................................11
      14.2. Informative Reference...................................11
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