Seamless Bidirectional Forwarding Detection (S-BFD) for IPv4, IPv6 and MPLS
draft-ietf-bfd-seamless-ip-05
Internet Engineering Task Force N. Akiya
Internet-Draft Big Switch Networks
Intended status: Standards Track C. Pignataro
Expires: November 5, 2016 D. Ward
Cisco
May 4, 2016
Seamless Bidirectional Forwarding Detection (S-BFD) for
IPv4, IPv6 and MPLS
draft-ietf-bfd-seamless-ip-05
Abstract
This document defines procedures to use Seamless Bidirectional
Forwarding Detection (S-BFD) for IPv4, IPv6 and MPLS environments.
Requirements Language
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 2119 [RFC2119].
Status of This Memo
This Internet-Draft is submitted in full conformance with the
provisions of BCP 78 and BCP 79.
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This Internet-Draft will expire on November 5, 2016.
Copyright Notice
Copyright (c) 2016 IETF Trust and the persons identified as the
document authors. All rights reserved.
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Provisions Relating to IETF Documents
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Table of Contents
1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . 2
2. S-BFD UDP Port . . . . . . . . . . . . . . . . . . . . . . . 2
3. S-BFD Echo UDP Port . . . . . . . . . . . . . . . . . . . . . 3
4. S-BFD Control Packet Demultiplexing . . . . . . . . . . . . . 3
5. Initiator Procedures . . . . . . . . . . . . . . . . . . . . 3
5.1. Details of S-BFD Control Packet Sent by SBFDInitiator . . 4
5.1.1. Target vs. Remote Entity (S-BFD Discriminator) . . . 4
6. Responder Procedures . . . . . . . . . . . . . . . . . . . . 5
6.1. Details of S-BFD Control Packet Sent by SBFDReflector . . 5
7. Security Considerations . . . . . . . . . . . . . . . . . . . 5
8. IANA Considerations . . . . . . . . . . . . . . . . . . . . . 6
9. Acknowledgements . . . . . . . . . . . . . . . . . . . . . . 6
10. Contributors . . . . . . . . . . . . . . . . . . . . . . . . 6
11. References . . . . . . . . . . . . . . . . . . . . . . . . . 7
11.1. Normative References . . . . . . . . . . . . . . . . . . 7
11.2. Informative References . . . . . . . . . . . . . . . . . 7
Authors' Addresses . . . . . . . . . . . . . . . . . . . . . . . 8
1. Introduction
Seamless Bidirectional Forwarding Detection (S-BFD),
[I-D.ietf-bfd-seamless-base], defines a generalized mechanism to
allow network nodes to seamlessly perform continuity checks to remote
entities. This document defines necessary procedures to use S-BFD on
IPv4, IPv6 and MPLS environments.
The reader is expected to be familiar with the IP [RFC0791]
[RFC2460], BFD [RFC5880], MPLS BFD [RFC5884], and S-BFD
[I-D.ietf-bfd-seamless-base] terminologies and protocol constructs.
2. S-BFD UDP Port
A new UDP port is defined for the use of the S-BFD on IPv4, IPv6 and
MPLS environments: 7784.
On S-BFD control packets from the SBFDInitiator to the SBFDReflector,
the SBFDReflector session MUST listen for incoming S-BFD control
packets on the port 7784. SBFDInitiator sessions MUST transmit S-BFD
control packets with destination port 7784. The source port of the
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S-BFD control packets transmitted by SBFDInitiator sessions can be
any but MUST NOT be 7784. The same UDP source port number MUST be
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