Internet Engineering Task Force (IETF) V. Manral
Request for Comments: 7175 Ionos Corp.
Category: Standards Track D. Eastlake 3rd
ISSN: 2070-1721 Huawei R&D USA
D. Ward
Cisco Systems
A. Banerjee
Cumulus Networks
May 2014
Transparent Interconnection of Lots of Links (TRILL):
Bidirectional Forwarding Detection (BFD) Support
Abstract
This document specifies use of the Bidirectional Forwarding Detection
(BFD) protocol in Routing Bridge (RBridge) campuses based on the
RBridge Channel extension to the Transparent Interconnection of Lots
of Links (TRILL) protocol.
BFD is a widely deployed Operations, Administration, and Maintenance
(OAM) mechanism in IP and MPLS networks, using UDP and Associated
Channel Header (ACH) encapsulation respectively. This document
specifies the BFD encapsulation over TRILL.
Status of This Memo
This is an Internet Standards Track document.
This document is a product of the Internet Engineering Task Force
(IETF). It represents the consensus of the IETF community. It has
received public review and has been approved for publication by the
Internet Engineering Steering Group (IESG). Further information on
Internet Standards is available in Section 2 of RFC 5741.
Information about the current status of this document, any errata,
and how to provide feedback on it may be obtained at
http://www.rfc-editor.org/info/rfc7175.
Manral, et al. Standards Track [Page 1]RFC 7175 TRILL BFD Support May 2014Copyright Notice
Copyright (c) 2014 IETF Trust and the persons identified as the
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Table of Contents
1. Introduction ....................................................2
1.1. Terminology ................................................3
2. BFD over TRILL ..................................................3
2.1. Sessions and Initialization ................................4
3. TRILL BFD Control Protocol ......................................5
3.1. One-Hop TRILL BFD Control ..................................5
3.2. BFD Control Frame Processing ...............................5
4. TRILL BFD Echo Protocol .........................................6
4.1. BFD Echo Frame Processing ..................................6
5. Management and Operations Considerations ........................7
6. Default Authentication ..........................................7
7. Security Considerations .........................................8
8. IANA Considerations .............................................9
9. Acknowledgements ................................................9
10. References .....................................................9
10.1. Normative References ......................................9
10.2. Informative References ...................................10
1. Introduction
Faster convergence is a critical feature of Transparent
Interconnection of Lots of Links (TRILL) [RFC6325] networks. The
TRILL IS-IS Hellos [RFC7177] [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.
Manral, et al. Standards Track [Page 2]RFC 7175 TRILL BFD Support May 2014
Some applications, including Voice over IP, may wish, with high
probability, to detect interruptions in continuity within a much
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