TRILL Working Group V. Manral
INTERNET-DRAFT Hewlett Packard Co.
Intended status: Proposed Standard D. Eastlake
Huawei R&D USA
D. Ward
Cisco Systems
A. Banerjee
Cumulus Networks
Expires: January 15, 2013 July 16, 2012
TRILL (Transparent Interconnetion of Lots of Links):
Bidirectional Forwarding Detection (BFD) Support
<draft-ietf-trill-rbridge-bfd-07.txt>
Abstract
This document specifies use of the BFD (Bidirectional Forwarding
Detection) protocol in RBridge campuses based on the Rbridge Channel
extension to the the TRILL (TRansparent Interconnection of Lots of
Links) protocol.
BFD is a widely deployed OAM (Operations, Administration, and
Maintenance) mechanism in IP and MPLS (Multi Protocol Label
Switching) networks, using UDP and ACH (Associated Channel Header)
encapsulation respectively. This document specifies the BFD
encapsulation over TRILL.
Status of This Memo
This Internet-Draft is submitted to IETF in full conformance with the
provisions of BCP 78 and BCP 79. Distribution of this document is
unlimited. Comments should be sent to the TRILL working group mailing
list: <rbridge@postel.org>.
Internet-Drafts are working documents of the Internet Engineering
Task Force (IETF), its areas, and its working groups. Note that
other groups may also distribute working documents as Internet-
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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."
V. Manral, et al [Page 1]
INTERNET-DRAFT BFD TRILL Encapsulation
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V. Manral, et al [Page 2]
INTERNET-DRAFT BFD TRILL Encapsulation
Table of Contents
1. Introduction............................................4
1.1 Terminology............................................4
2. BFD over TRILL.........................................6
2.1 Sessions and Initialization............................6
3. TRILL BFD Control Protocol..............................8
3.1 One-Hop TRILL BFD Control..............................8
3.2 BFD Control Frame Processing...........................8
4. TRILL BFD Echo Protocol.................................9
4.1 BFD Echo Frame Processing.............................9
5. Management and Operations Considerations...............11
6. Default Authentication.................................12
7. Security Considerations................................14
8. IANA Considerations....................................15
9. Acknowledgements.......................................15
Normative References......................................16
Informative References....................................16
Recent Changes Record.....................................18
V. Manral, et al [Page 3]
INTERNET-DRAFT BFD TRILL Encapsulation
1. Introduction
Faster convergence is a critical feature of TRILL (Transparent
Interconnection of Lots of Links [RFC6325]) networks. The TRILL IS-
IS Hellos [RFC6327] [IS-IS] used between RBridges provide a basic
neighbor and continuity check for TRILL links. However, failure
detection by non- receipt of such Hellos is based on the holding time
parameter that is commonly set to a value of tens of seconds and, in
any case, has a minimum expressible value of one second.
Some applications, including voice over IP, may wish, with high
probability, to detect interruptions in continuity within a much
shorter time period. In some cases physical layer failures can be
detected very rapidly but this is not always possible, such as when
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