Network Working Group L. Howard Internet-Draft Time Warner Cable Intended status: Informational December 29, 2011 Expires: July 1, 2012 Homenet Routing Requirements draft-howard-homenet-routing-requirements-00 Abstract This document describes the requirements for routing in an unmanaged home network. 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 Task Force (IETF). Note that other groups may also distribute working documents as Internet-Drafts. The list of current Internet- Drafts is at http://datatracker.ietf.org/drafts/current/. Internet-Drafts are draft documents valid for a maximum of six months and may be updated, replaced, or obsoleted by other documents at any 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 July 1, 2012. Copyright Notice Copyright (c) 2011 IETF Trust and the persons identified as the document authors. All rights reserved. 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 publication of this document. Please review these documents carefully, as they describe your rights and restrictions with respect to this document. Code Components extracted from this document must include Simplified BSD License text as described in Section 4.e of the Trust Legal Provisions and are provided without warranty as described in the Simplified BSD License. Howard Expires July 1, 2012 [Page 1] Internet-Draft homenet-routing-reqs December 2011 Table of Contents 1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . . 3 2. Requirements . . . . . . . . . . . . . . . . . . . . . . . . . 3 3. Security Considerations . . . . . . . . . . . . . . . . . . . . 4 4. IANA Considerations . . . . . . . . . . . . . . . . . . . . . . 5 5. Informative References . . . . . . . . . . . . . . . . . . . . 5 Author's Address . . . . . . . . . . . . . . . . . . . . . . . . . 5 Howard Expires July 1, 2012 [Page 2] Internet-Draft homenet-routing-reqs December 2011 1. Introduction This document describes the requirements for routing in an unmanaged home network. Home networks are evolving to include multiple routers and potentially multiple possible exits. These exist may include multiple Internet access paths (through one or more multiple access providers), "walled garden" environments for video, VPN, or other service access, and smart energy devices. 2. Requirements Reachability between all nodes in the home network. Links may be Ethernet, WiFi, MoCA, or any other; test all solutions against mutliple L2 types. Border detection. Any solution will have to determine the routing boundary. It is assumed that no home networking device can handle a full routing table for the Internet, and that a home router should not be required to do so. Border may be upstream ISP, or may be a device that is a gateway to SmartGrid devices, e.g. a controller that speaks RPL to 802.15.4 and foo to home net. Or there may be no border, if no external connection has been established. Must be able to find "up" (a path to the Internet), but must not be dependent on "up" (Internet connectivity) existing for intra-home reachability. May be discovered by routing protocol, or other means. Robust to routers being moved/added/removed/renumbered. Convergence time a few minutes or less. No configuration required. It may be acceptable to require a single password or passphrase to be entered on each device, both for security, and to establish the administrative boundary. Best-path is a non-requirement. Support for multiple upstream networks is a requirement. Including wireless offload, video-only, and split-tunnel VPN scenarios. It may be assumed that each upstream will be connected via a separate router, not multihomed off the same router. Howard Expires July 1, 2012 [Page 3] Internet-Draft homenet-routing-reqs December 2011 Must support a prefix delegated from each provider. How hosts handle multiple prefixes is not a routing problem. Load-balancing among providers is a non-requirement. If multiple upstream networks can provide a path to the same destination (such as an Internet host), the solution must allow for backup in case the router or link to one upstream fails. Failover time should be within a few minutes. Must support a "walled-garden" network. This might routing based on either source address (from the walled garden network) or destination address (to the walled garden network); support for both is not required. Source address selection is out of scope for the routing solution. Choosing which address to use to look up the destination address is out of scope for the routing solution. Cannot assume hierarchical prefix delegation in the home, unless the Homenet working group finds consensus on a hierarchical addressing mechanism. A host with mutliple upstream paths to the same destination (in- home or external) should be able to use another in case on fails. Prevent looping. Should be a lightweight solution. Must handle multi-dwelling units or other potential dense wireless or wired networks. Must be resilient to running on wireless networks. Must be able to handle both wired and wireless links. Robustness in the face of unintentional joining of networks. 3. Security Considerations As a requirements document, no security considerations are created. The solution should be safe from route injection to perpetrate man- in-the-middle attacks, especially in multi-dwelling or other dense/ mesh networks, but this may be a link requirement more than a routing requirement. Howard Expires July 1, 2012 [Page 4] Internet-Draft homenet-routing-reqs December 2011 4. IANA Considerations There are no IANA considerations or implications that arise from this document. 5. Informative References [RFC6204] Cisco Systems, Inc., Cisco Systems, Inc., CableLabs, AT&T, and Cisco Systems, Inc., "Basic Requirements for IPv6 Customer Edge Routers". Author's Address Lee Howard Time Warner Cable 13820 Sunrise Valley Drive Herndon, VA 20171 US Phone: +1 703 345 3513 Email: lee.howard@twcable.com Howard Expires July 1, 2012 [Page 5]