draft-ietf-bfd-stability-02.txt   draft-ietf-bfd-stability-03.txt 
Network Working Group A. Mishra Network Working Group A. Mishra
Internet-Draft O3b Networks Internet-Draft SES
Intended status: Standards Track M. Jethanandani Intended status: Standards Track M. Jethanandani
Expires: November 26, 2018 Expires: August 25, 2019
A. Saxena A. Saxena
Ciena Corporation Ciena Corporation
S. Pallagatti S. Pallagatti
Juniper Networks Juniper Networks
M. Chen M. Chen
Huawei Huawei
P. Fan P. Fan
China Mobile China Mobile
May 25, 2018 February 21, 2019
BFD Stability BFD Stability
draft-ietf-bfd-stability-02 draft-ietf-bfd-stability-03
Abstract Abstract
This document describes extensions to the Bidirectional Forwarding This document describes extensions to the Bidirectional Forwarding
Detection (BFD) protocol to measure BFD stability. Specifically, it Detection (BFD) protocol to measure BFD stability. Specifically, it
describes a mechanism for detection of BFD frame loss. describes a mechanism for detection of BFD frame loss.
Requirements Language Requirements Language
The key words "MUST", "MUST NOT", "REQUIRED", "SHALL", "SHALL NOT", The key words "MUST", "MUST NOT", "REQUIRED", "SHALL", "SHALL NOT",
"SHOULD", "SHOULD NOT", "RECOMMENDED", "MAY", and "OPTIONAL" in this "SHOULD", "SHOULD NOT", "RECOMMENDED", "MAY", and "OPTIONAL" in this
document are to be interpreted as described in RFC 2119 [RFC2119]. document are to be interpreted as described in RFC 2119 [RFC2119] .
Status of This Memo Status of This Memo
This Internet-Draft is submitted in full conformance with the This Internet-Draft is submitted in full conformance with the
provisions of BCP 78 and BCP 79. provisions of BCP 78 and BCP 79.
Internet-Drafts are working documents of the Internet Engineering Internet-Drafts are working documents of the Internet Engineering
Task Force (IETF). Note that other groups may also distribute Task Force (IETF). Note that other groups may also distribute
working documents as Internet-Drafts. The list of current Internet- working documents as Internet-Drafts. The list of current Internet-
Drafts is at https://datatracker.ietf.org/drafts/current/. Drafts is at https://datatracker.ietf.org/drafts/current/.
Internet-Drafts are draft documents valid for a maximum of six months Internet-Drafts are draft documents valid for a maximum of six months
and may be updated, replaced, or obsoleted by other documents at any and may be updated, replaced, or obsoleted by other documents at any
time. It is inappropriate to use Internet-Drafts as reference time. It is inappropriate to use Internet-Drafts as reference
material or to cite them other than as "work in progress." material or to cite them other than as "work in progress."
This Internet-Draft will expire on November 26, 2018. This Internet-Draft will expire on August 25, 2019.
Copyright Notice Copyright Notice
Copyright (c) 2018 IETF Trust and the persons identified as the Copyright (c) 2019 IETF Trust and the persons identified as the
document authors. All rights reserved. document authors. All rights reserved.
This document is subject to BCP 78 and the IETF Trust's Legal This document is subject to BCP 78 and the IETF Trust's Legal
Provisions Relating to IETF Documents Provisions Relating to IETF Documents
(https://trustee.ietf.org/license-info) in effect on the date of (https://trustee.ietf.org/license-info) in effect on the date of
publication of this document. Please review these documents publication of this document. Please review these documents
carefully, as they describe your rights and restrictions with respect carefully, as they describe your rights and restrictions with respect
to this document. Code Components extracted from this document must to this document. Code Components extracted from this document must
include Simplified BSD License text as described in Section 4.e of include Simplified BSD License text as described in Section 4.e of
the Trust Legal Provisions and are provided without warranty as the Trust Legal Provisions and are provided without warranty as
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4.1. Loss Measurement . . . . . . . . . . . . . . . . . . . . 3 4.1. Loss Measurement . . . . . . . . . . . . . . . . . . . . 3
5. IANA Considerations . . . . . . . . . . . . . . . . . . . . . 4 5. IANA Considerations . . . . . . . . . . . . . . . . . . . . . 4
6. Security Consideration . . . . . . . . . . . . . . . . . . . 4 6. Security Consideration . . . . . . . . . . . . . . . . . . . 4
7. Contributors . . . . . . . . . . . . . . . . . . . . . . . . 4 7. Contributors . . . . . . . . . . . . . . . . . . . . . . . . 4
8. Acknowledgements . . . . . . . . . . . . . . . . . . . . . . 4 8. Acknowledgements . . . . . . . . . . . . . . . . . . . . . . 4
9. Normative References . . . . . . . . . . . . . . . . . . . . 4 9. Normative References . . . . . . . . . . . . . . . . . . . . 4
Authors' Addresses . . . . . . . . . . . . . . . . . . . . . . . 4 Authors' Addresses . . . . . . . . . . . . . . . . . . . . . . . 4
1. Introduction 1. Introduction
The Bidirectional Forwarding Detection (BFD) [RFC5880] protocol The Bidirectional Forwarding Detection ( BFD) [RFC5880] protocol
operates by transmitting and receiving control frames, generally at operates by transmitting and receiving control frames, generally at
high frequency, over the datapath being monitored. In order to high frequency, over the datapath being monitored. In order to
prevent significant data loss due to a datapath failure, the prevent significant data loss due to a datapath failure, the
tolerance for lost or delayed frames in the Detection Time, as tolerance for lost or delayed frames in the Detection Time, as
defined in BFD [RFC5880] is set to the smallest feasible value. defined in BFD [RFC5880] is set to the smallest feasible value.
This document proposes a mechanism to detect lost frames in a BFD This document proposes a mechanism to detect lost frames in a BFD
session in addition to the datapath fault detection mechanisms of session in addition to the datapath fault detection mechanisms of
BFD. Such a mechanism presents significant value to measure the BFD. Such a mechanism presents significant value to measure the
stability of BFD sessions and provides data to the operators for the stability of BFD sessions and provides data to the operators for the
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Authors would like to thank Nobo Akiya, Jeffery Haas, Peng Fan, Authors would like to thank Nobo Akiya, Jeffery Haas, Peng Fan,
Dileep Singh, Basil Saji, Sagar Soni and Mallik Mudigonda who also Dileep Singh, Basil Saji, Sagar Soni and Mallik Mudigonda who also
contributed to this document. contributed to this document.
9. Normative References 9. Normative References
[I-D.ietf-bfd-optimizing-authentication] [I-D.ietf-bfd-optimizing-authentication]
Jethanandani, M., Mishra, A., Saxena, A., and M. Bhatia, Jethanandani, M., Mishra, A., Saxena, A., and M. Bhatia,
"Optimizing BFD Authentication", draft-ietf-bfd- "Optimizing BFD Authentication", draft-ietf-bfd-
optimizing-authentication-04 (work in progress), November optimizing-authentication-07 (work in progress), November
2017. 2018.
[RFC2119] Bradner, S., "Key words for use in RFCs to Indicate [RFC2119] Bradner, S., "Key words for use in RFCs to Indicate
Requirement Levels", BCP 14, RFC 2119, Requirement Levels", BCP 14, RFC 2119,
DOI 10.17487/RFC2119, March 1997, DOI 10.17487/RFC2119, March 1997,
<https://www.rfc-editor.org/info/rfc2119>. <https://www.rfc-editor.org/info/rfc2119>.
[RFC5880] Katz, D. and D. Ward, "Bidirectional Forwarding Detection [RFC5880] Katz, D. and D. Ward, "Bidirectional Forwarding Detection
(BFD)", RFC 5880, DOI 10.17487/RFC5880, June 2010, (BFD)", RFC 5880, DOI 10.17487/RFC5880, June 2010,
<https://www.rfc-editor.org/info/rfc5880>. <https://www.rfc-editor.org/info/rfc5880>.
Authors' Addresses Authors' Addresses
Ashesh Mishra Ashesh Mishra
O3b Networks SES
Email: mishra.ashesh@gmail.com Email: mishra.ashesh@gmail.com
Mahesh Jethanandani Mahesh Jethanandani
CA CA
USA USA
Email: mjethanandani@gmail.com Email: mjethanandani@gmail.com
Ankur Saxena Ankur Saxena
Ciena Corporation Ciena Corporation
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