OSPF Extensions for Advertising/Signaling Geo Location Information
draft-acee-ospf-geo-location-00
The information below is for an old version of the document.
| Document | Type | Active Internet-Draft (individual) | |
|---|---|---|---|
| Authors | Acee Lindem , Naiming Shen , Enke Chen | ||
| Last updated | 2016-02-12 | ||
| Stream | (None) | ||
| Formats | plain text htmlized pdfized bibtex | ||
| Stream | Stream state | (No stream defined) | |
| Consensus boilerplate | Unknown | ||
| RFC Editor Note | (None) | ||
| IESG | IESG state | I-D Exists | |
| Telechat date | (None) | ||
| Responsible AD | (None) | ||
| Send notices to | (None) |
draft-acee-ospf-geo-location-00
Network Working Group A. Lindem, Ed.
Internet-Draft N. Shen
Intended status: Standards Track E. Chen
Expires: August 15, 2016 Cisco Systems
February 12, 2016
OSPF Extensions for Advertising/Signaling Geo Location Information
draft-acee-ospf-geo-location-00.txt
Abstract
This document specifies an OSPF Link-Local-Signaling (LLS) TLV to
signal the current Geo Coordinates of the OSPF router. For Point-to-
Point (P2)) and Point-to-Multi-Point (P2MP) networks, the Geo
Coordinates can be used to dynamically computing the cost to
neighbors. This is useful both from the standpoint of auto-
configuration and situations where the OSPF routers are moving. The
Geo Coordinates are also useful for other applications such as
Traffic Engineering (TE) and network management and can be advertised
in the OSPF Router Information (RI) LSA.
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 August 15, 2016.
Copyright Notice
Copyright (c) 2016 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
Lindem, et al. Expires August 15, 2016 [Page 1]
Internet-Draft OSPF Geo Location Extensions February 2016
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.
Table of Contents
1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . 2
1.1. Requirements Notation . . . . . . . . . . . . . . . . . . 2
2. OSPF Geo Coordinates TLV . . . . . . . . . . . . . . . . . . 2
3. OSPF Geo Coordinates Link-Local-Signaling . . . . . . . . . . 4
4. OSPFv2 Router Information (RI) Opaque LSA . . . . . . . . . . 4
5. Security Considerations . . . . . . . . . . . . . . . . . . . 4
6. IANA Considerations . . . . . . . . . . . . . . . . . . . . . 5
7. References . . . . . . . . . . . . . . . . . . . . . . . . . 5
7.1. Normative References . . . . . . . . . . . . . . . . . . 5
7.2. Informative References . . . . . . . . . . . . . . . . . 5
Appendix A. Acknowledgments . . . . . . . . . . . . . . . . . . 6
Authors' Addresses . . . . . . . . . . . . . . . . . . . . . . . 6
1. Introduction
This document specifies an OSPF Link-Local-Signaling (LLS) TLV to
signal the current Geo Coordinates of the OSPF router. For Point-to-
Point (P2)) and Point-to-Multi-Point (P2MP) networks, the Geo
Coordinates can be used to dynamically computing the cost to
neighbors. This is useful both from the standpoint of auto-
configuration and situations where the OSPF routers are moving. The
Geo Coordinates are also useful for other applications such as
Traffic Engineering (TE) and network management and can be advertised
in the OSPF Router Information (RI) LSA [OSPF-RI].
1.1. Requirements Notation
The key words "MUST", "MUST NOT", "REQUIRED", "SHALL", "SHALL NOT",
"SHOULD", "SHOULD NOT", "RECOMMENDED", "MAY", and "OPTIONAL" in this
document are to be interpreted as described in [RFC-KEYWORDS].
2. OSPF Geo Coordinates TLV
The Geo Coordinates TLV can be used to advertise the current location
of an OSPFv2 [OSPF] or OSPFv3 [OSPFV3] router using either OSPF Link-
Local-Signaling [LLS] or the OSPF Router Information LSA [OSPF-RI].
The Geo Coordinates TLV encoding is adapted from the format in
[LISP-CAF]. The value of the Geo Coordinates TLV consists of the
following fields:
Lindem, et al. Expires August 15, 2016 [Page 2]
Internet-Draft OSPF Geo Location Extensions February 2016
0 1 2 3
0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Type | Length |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
|N| Latitude Degrees | Minutes | Seconds |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
|E| Longitude Degrees | Minutes | Seconds |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Altitude |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| .. Optional Sub-TLVs
+-+-+-+-+-+-+-+-+-....
Type: TBD. 8 bits value, to be assigned by IANA.
Length: Variable. 8 bits value. The mandatory part is 12 octets.
N: Bit indicating North (set) or South (clear).
Latitude Degrees: Valid values range from 0 to 90 degrees above or
below the equator (northern or southern hemisphere,
respectively).
Latitude Minutes: Valid values range from 0 to 59.
Latitude Seconds: Valid values range from 0 to 59.
E: Bit indicating East (set) or West (clear).
Longitude Degrees: Value values are from 0 to 180 degrees right or
left of the Prime Meridian.
Longitude Minutes: Valid values range from 0 to 59.
Longitude Seconds: Valid values range from 0 to 59.
Altitude: Height relative to sea level in meters. This is a signed
integer meaning that the altitude could be below sea
level. A value of 0x7fffffff indicates no Altitude value
is encoded.
Optional Sub-TLVs: No additional Sub-TLVs are defined in this
document.
OSPF Geo Coordinates TLV
Lindem, et al. Expires August 15, 2016 [Page 3]
Internet-Draft OSPF Geo Location Extensions February 2016
3. OSPF Geo Coordinates Link-Local-Signaling
The OSPF Geo Coordinates TLV may optionally be included in the Link-
Local-Signaling [LLS] data block appended to OSPF hello packets.
When an OSPF router receives the Geo Coordinates TLV in the LLS
extension from an adjacent neighbor, it can be used to calculate the
physical distance to neighbor. For P2P and P2MP networks, this
distance can be used to dynamically compute the cost of the link to
that neighbor. The mapping of the distance to advertised cost is a
local matter and is not specified in this document. Computation of
cost based on physical distance can be useful both for
autoconfiguration of these networks types and dynamic cost
computation when the routers are moving.
The Geo location information can be statically provisioned or
dynamically acquired from a GPS capable device on the OSPF Router.
4. OSPFv2 Router Information (RI) Opaque LSA
The OSPF Geo Coordinates TLV may optionally be advertised in the OSPF
Router Information (RI) LSA [OSPF-RI]. It then may be used for
applications such as traffic engineering (TE) and network management
(e.g., the Find-My-Router application). The details of such
applications are beyond the scope of this document.
5. Security Considerations
Since the Geo Location coordinates provide the exact location of the
OSPF router, disclosure will make the OSPF router more susceptible to
physical attacks. In situations where this is a concern (e.g.,
military applications), confidentiality should be provided either
through a secure tunnel (e.g., [IP-ESP]) or protocol encryption
[OSPFV3-AUTH].
Additionally, in some situations, the topology of the network is
considered proprietary information. With the Geo Location
coordinates, the physical topology, as well as the IP topology, can
be discerned from the OSPF Router Information (RI) LSA. In these
situations, confidentiality should be assured.
Security considerations for the base OSPF protocol are covered in
[OSPF] and [OSPFV3].
Lindem, et al. Expires August 15, 2016 [Page 4]
Internet-Draft OSPF Geo Location Extensions February 2016
6. IANA Considerations
The document will require two IANA actions:
1. An LLS Type TLV for the Geo Location TLV will be allocated from
the OSPF Link Local Signaling TLV Identifiers (LLS Types)
registry.
2. A Router Information TLV type for the Geo Location TLV will be
allocated from the OSPF Router Information (RI) TLVs registry.
7. References
7.1. Normative References
[LLS] Zinin, A., Roy, A., Nguyen, L., Friedman, B., and D.
Young, "OSPF Link-local Signaling", RFC 5613, August 2009.
[OSPF] Moy, J., "OSPF Version 2", STD 54, RFC 2328, April 1998.
[OSPF-RI] Lindem, A., Shen, N., Vasseur, J., Aggarwal, R., and S.
Shaffer, "Extensions to OSPF for Advertising Optional
Router Capabilities", RFC 7770, January 2016.
[OSPFV3] Coltun, R., Ferguson, D., Moy, J., and A. Lindem, "OSPF
for IPv6", RFC 5340, July 2008.
[RFC-KEYWORDS]
Bradner, S., "Key words for use in RFC's to Indicate
Requirement Levels", BCP 14, RFC 2119, March 1997.
7.2. Informative References
[IP-ESP] Kent, S., "IP Encapsulation Security Payload (ESP)", RFC
4303, December 2005.
[LISP-CAF]
Farinacci, D., Meyers, D., and J. Snijders, "LISP
Cananical Address Format (LCAF)", draft-ietf-list-lcaf-
11.txt (work in progress), September 2015.
[OSPFV3-AUTH]
Gupta, M. and S. Melam, "Authentication/Confidentiality
for OSPFv3", RFC 4552, June 2006.
Lindem, et al. Expires August 15, 2016 [Page 5]
Internet-Draft OSPF Geo Location Extensions February 2016
Appendix A. Acknowledgments
The RFC text was produced using Marshall Rose's xml2rfc tool.
The encoding of the Geo location is adapted from the "Geo Coordinate
LISP Canonical Address Format" specified in the "LISP Canonical
Address Format (LCAF)". We would like to thank the authors of that
Document.
Authors' Addresses
Acee Lindem (editor)
Cisco Systems
301 Midenhall Way
Cary, NC 27513
USA
Email: acee@cisco.com
Naiming Shen
Cisco Systems
821 Alder Drive
Milpitas, CA 95935
USA
Email: naiming@cisco.com
Enke Chen
Cisco Systems
225 West Tasman Drive
San Jose, CA 95134
USA
Email: enkechen@cisco.com
Lindem, et al. Expires August 15, 2016 [Page 6]