Bidirectional Forwarding Detection (BFD) Multipoint Active Tails
RFC 8563
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Type |
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RFC - Proposed Standard
(April 2019; No errata)
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Last updated |
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2019-04-02
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Replaces |
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draft-spallagatti-bfd-multipoint-active-tail
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Stream |
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IETF
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Formats |
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plain text
pdf
html
bibtex
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Reviews |
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WG state
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Submitted to IESG for Publication
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Document shepherd |
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Reshad Rahman
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Shepherd write-up |
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Show
(last changed 2018-03-05)
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| IESG |
IESG state |
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RFC 8563 (Proposed Standard)
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Consensus Boilerplate |
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Yes
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Telechat date |
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Responsible AD |
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Martin Vigoureux
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Send notices to |
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Reshad Rahman <rrahman@cisco.com>
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| IANA |
IANA review state |
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Version Changed - Review Needed
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IANA action state |
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No IANA Actions
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Internet Engineering Task Force (IETF) D. Katz
Request for Comments: 8563 Juniper Networks
Category: Standards Track D. Ward
ISSN: 2070-1721 Cisco Systems
S. Pallagatti, Ed.
VMware
G. Mirsky, Ed.
ZTE Corp.
April 2019
Bidirectional Forwarding Detection (BFD) Multipoint Active Tails
Abstract
This document describes active tail extensions to the Bidirectional
Forwarding Detection (BFD) protocol for multipoint networks.
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 7841.
Information about the current status of this document, any errata,
and how to provide feedback on it may be obtained at
https://www.rfc-editor.org/info/rfc8563.
Copyright Notice
Copyright (c) 2019 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
(https://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.
Katz, et al. Standards Track [Page 1]
RFC 8563 BFD Multipoint Active Tails April 2019
Table of Contents
1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . 3
2. Terminology and Acronyms . . . . . . . . . . . . . . . . . . 3
3. Keywords . . . . . . . . . . . . . . . . . . . . . . . . . . 3
4. Overview . . . . . . . . . . . . . . . . . . . . . . . . . . 4
5. Operational Scenarios . . . . . . . . . . . . . . . . . . . . 5
5.1. No Head Notification . . . . . . . . . . . . . . . . . . 5
5.2. Head Notification . . . . . . . . . . . . . . . . . . . . 5
5.2.1. Head Notification without Polling . . . . . . . . . . 5
5.2.2. Head Notification and Tail Solicitation with
Multipoint Polling . . . . . . . . . . . . . . . . . 6
5.2.3. Head Notification with Composite Polling . . . . . . 6
6. Protocol Details . . . . . . . . . . . . . . . . . . . . . . 7
6.1. Multipoint Client Session . . . . . . . . . . . . . . . . 8
6.2. Multipoint Client Session Failure . . . . . . . . . . . . 8
6.3. State Variables . . . . . . . . . . . . . . . . . . . . . 8
6.3.1. New State Variables . . . . . . . . . . . . . . . . . 8
6.3.2. New State Variable Value . . . . . . . . . . . . . . 9
6.3.3. State Variable Initialization and Maintenance . . . . 10
6.4. Controlling Multipoint BFD Options . . . . . . . . . . . 11
6.5. State Machine . . . . . . . . . . . . . . . . . . . . . . 11
6.6. Session Establishment . . . . . . . . . . . . . . . . . . 12
6.7. Discriminators and Packet Demultiplexing . . . . . . . . 12
6.8. Controlling Tail Packet Transmission . . . . . . . . . . 12
6.9. Soliciting the Tails . . . . . . . . . . . . . . . . . . 13
6.10. Verifying Connectivity to Specific Tails . . . . . . . . 13
6.11. Detection Times . . . . . . . . . . . . . . . . . . . . . 14
6.12. MultipointClient Down/AdminDown Sessions . . . . . . . . 15
6.13. Base BFD for Multipoint Networks Specification Text
Replacement . . . . . . . . . . . . . . . . . . . . . . . 15
6.13.1. Reception of BFD Control Packets . . . . . . . . . . 15
6.13.2. Demultiplexing BFD Control Packets . . . . . . . . . 16
6.13.3. Transmitting BFD Control Packets . . . . . . . . . . 16
7. Assumptions . . . . . . . . . . . . . . . . . . . . . . . . . 17
8. Operational Considerations . . . . . . . . . . . . . . . . . 18
9. IANA Considerations . . . . . . . . . . . . . . . . . . . . . 18
10. Security Considerations . . . . . . . . . . . . . . . . . . . 18
11. Normative References . . . . . . . . . . . . . . . . . . . . 19
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