Link-Layer Event Notifications for Detecting Network Attachments
RFC 4957
Document | Type | RFC - Informational (August 2007; Errata) | |
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Authors | Suresh Krishnan , Siva Veerepalli , Eric Njedjou , Alper Yegin , Nicolas Montavont | ||
Last updated | 2015-10-14 | ||
Stream | Internent Engineering Task Force (IETF) | ||
Formats | plain text html pdf htmlized (tools) htmlized bibtex | ||
Stream | WG state | (None) | |
Document shepherd | No shepherd assigned | ||
IESG | IESG state | RFC 4957 (Informational) | |
Action Holders |
(None)
|
||
Consensus Boilerplate | Unknown | ||
Telechat date | |||
Responsible AD | Jari Arkko | ||
Send notices to | alper.yegin@samsung.com |
Network Working Group S. Krishnan, Ed. Request for Comments: 4957 Ericsson Research Category: Informational N. Montavont GET ENST Bretagne E. Njedjou France Telecom S. Veerepalli Qualcomm A. Yegin, Ed. Samsung August 2007 Link-Layer Event Notifications for Detecting Network Attachments Status of This Memo This memo provides information for the Internet community. It does not specify an Internet standard of any kind. Distribution of this memo is unlimited. Copyright Notice Copyright (C) The IETF Trust (2007). Abstract Certain network access technologies are capable of providing various types of link-layer status information to IP. Link-layer event notifications can help IP expeditiously detect configuration changes. This document provides a non-exhaustive catalogue of information available from well-known access technologies. Krishnan, et al. Informational [Page 1] RFC 4957 L2 Notifications for DNA August 2007 Table of Contents 1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . . 3 2. Terminology . . . . . . . . . . . . . . . . . . . . . . . . . 4 3. Link-Layer Event Notifications . . . . . . . . . . . . . . . . 5 3.1. GPRS/3GPP . . . . . . . . . . . . . . . . . . . . . . . . 6 3.2. cdma2000/3GPP2 . . . . . . . . . . . . . . . . . . . . . . 7 3.3. IEEE 802.11/WiFi . . . . . . . . . . . . . . . . . . . . . 8 3.4. IEEE 802.3 CSMA/CD . . . . . . . . . . . . . . . . . . . . 9 3.4.1. Link Integrity Tests in 802.3 Networks . . . . . . . . 10 3.4.2. IEEE 802.1D Bridging and Its Effects on Link-layer Event Notifications . . . . . . . . . . . . . . . . . 11 3.4.3. 802.1AB Link-Layer Discovery Protocol . . . . . . . . 12 3.4.4. Other Heuristics . . . . . . . . . . . . . . . . . . . 13 3.4.5. Summary . . . . . . . . . . . . . . . . . . . . . . . 13 4. Security Considerations . . . . . . . . . . . . . . . . . . . 13 5. Contributors . . . . . . . . . . . . . . . . . . . . . . . . . 14 6. Acknowledgements . . . . . . . . . . . . . . . . . . . . . . . 14 7. References . . . . . . . . . . . . . . . . . . . . . . . . . . 14 7.1. Normative References . . . . . . . . . . . . . . . . . . . 14 7.2. Informative References . . . . . . . . . . . . . . . . . . 16 Krishnan, et al. Informational [Page 2] RFC 4957 L2 Notifications for DNA August 2007 1. Introduction It is not an uncommon occurrence for a node to change its point of attachment to the network. This can happen due to mobile usage (e.g., a mobile phone moving among base stations) or nomadic usage (e.g., road-warrior case). A node changing its point of attachment to the network may end up changing its IP subnet and therefore require reconfiguration of IP- layer parameters, such as IP address, default gateway information, and DNS server address. Detecting the subnet change can usually use network-layer indications (such as a change in the advertised prefixes for IPv6). But such indications may not be always available (e.g., Detecting Network Attachment in IPv6 (DNAv6)) to the node upon changing its point of attachment. Link-layer event notifications can help IP expeditiously detect configuration changes. This document provides a non-exhaustive catalog of information available from some access technologies, and discusses the interpretation of this information at the IP layer. This document is not intended to specify or change the behavior of these access technologies in any manner. Additional information can be conveyed along with the event, such as the identifier of the network attachment point (e.g., IEEE 802.11 Basic Service Set Identification (BSSID) and Service Set Identifier (SSID)), or network-layer configuration parameters obtained via the link-layer attachment process if available. It is envisaged that such event notifications can in certain circumstances be used to expedite the inter-subnet movement detection and reconfiguration process. For example, the notification indicating that the node has established a new link-layer connection may be used for immediatelyShow full document text