BFD Stability
draft-ietf-bfd-stability-12
| Document | Type | Active Internet-Draft (bfd WG) | |
|---|---|---|---|
| Authors | Ashesh Mishra , Mahesh Jethanandani , Ankur Saxena , Santosh Pallagatti , Mach Chen , Peng Fan | ||
| Last updated | 2024-01-31 | ||
| Replaces | draft-ashesh-bfd-stability | ||
| RFC stream | Internet Engineering Task Force (IETF) | ||
| Intended RFC status | Proposed Standard | ||
| Formats | |||
| Yang Validation | 0 errors, 0 warnings | ||
| Reviews |
YANGDOCTORS Last Call review
(of
-08)
by Ebben Aries
Ready w/nits
|
||
| Additional resources | Mailing list discussion | ||
| Stream | WG state | Held by WG | |
| Document shepherd | Reshad Rahman | ||
| Shepherd write-up | Show Last changed 2020-07-23 | ||
| IESG | IESG state | I-D Exists | |
| Consensus boilerplate | Yes | ||
| Telechat date | (None) | ||
| Responsible AD | (None) | ||
| Send notices to | Reshad Rahman <rrahman@cisco.com> |
draft-ietf-bfd-stability-12
quot;;
}
description
"Augment the 'bfd' container to add attributes related to BFD
stability.";
}
augment "/rt:routing/rt:control-plane-protocols/" +
"rt:control-plane-protocol/bfd:bfd/bfd-lag:lag/" +
"bfd-lag:sessions/bfd-lag:session/bfd-lag:member-links/" +
"bfd-lag:micro-bfd-ipv4/bfd-lag:session-statistics" {
leaf lost-packet-count {
type yang:counter32;
description
"Number of BFD packets that were lost without bringing the
session down. This counter should be present only if
stability is configured.";
}
description
"Augment the 'bfd' container to add attributes related to BFD
stability.";
}
augment "/rt:routing/rt:control-plane-protocols/" +
"rt:control-plane-protocol/bfd:bfd/bfd-mpls:mpls/" +
"bfd-mpls:session-groups/bfd-mpls:session-group/" +
"bfd-mpls:sessions/bfd-mpls:session-statistics" {
leaf lost-packet-count {
type yang:counter32;
description
"Number of BFD packets that were lost without bringing the
session down. This counter should be present only if
stability is configured.";
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}
description
"Augment the 'bfd' container to add attributes related to BFD
stability.";
}
}
<CODE ENDS>
7. IANA Considerations
7.1. The "IETF XML" Registry
This document registers one URIs in the "ns" subregistry of the "IETF
XML" registry [RFC3688]. Following the format in [RFC3688], the
following registration is requested:
URI: urn:ietf:params:xml:ns:yang:ietf-bfd-stability
Registrant Contact: The IESG
XML: N/A, the requested URI is an XML namespace.
7.2. The "YANG Module Names" Registry
This document registers one YANG modules in the "YANG Module Names"
registry [RFC6020]. Following the format in [RFC6020], the following
registrations are requested:
name: ietf-bfd-stability
namespace: urn:ietf:params:xml:ns:yang:ietf-bfd-stability
prefix: bfds
reference: RFC XXXX
8. Security Consideration
The YANG module specified in this document defines a schema for data
that is designed to be accessed via network management protocols such
as NETCONF [RFC6241] or RESTCONF [RFC8040]. The lowest NETCONF layer
is the secure transport layer, and the mandatory-to-implement secure
transport is Secure Shell (SSH) [RFC6242]. The lowest RESTCONF layer
is HTTPS, and the mandatory-to-implement secure transport is TLS
[RFC8446]. The NETCONF Access Control Model (NACM) [RFC8341]
provides the means to restrict access for particular NETCONF or
RESTCONF users to a preconfigured subset of all available NETCONF or
RESTCONF protocol operations and content.
The YANG module does not define any writeable/creatable/deletable
data nodes that can have an adverse impact on a BFD session.
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The only readable data nodes in YANG module may be considered
sensitive or vulnerable in some network environments. It is thus
important to control read access (e.g., via get, get-config, or
notification) to these data nodes.
The model defines a read-only variables to indicate the number of
packets that were lost. Access to this information may allow a
malicious user information on which links are experiencing issues.
The YANG module does not define any RPC operations.
9. Contributors
The authors of this document would like to acknowledge Jeff Haas as a
contributor to this document. Jeff played a role not only as a
shepherd but also actively contributed to the improvement of the
document. In addition, Manav Bhatia also contributed to this
document.
10. Acknowledgements
Authors would like to thank Nobo Akiya, Jeffery Haas, Dileep Singh,
Basil Saji, Sagar Soni, Albert Fu and Mallik Mudigonda who also
contributed to this document.
11. Normative References
[I-D.ietf-bfd-optimizing-authentication]
Jethanandani, M., Mishra, A., Saxena, A., and M. Bhatia,
"Optimizing BFD Authentication", Work in Progress,
Internet-Draft, draft-ietf-bfd-optimizing-authentication-
13, 1 August 2021, <https://datatracker.ietf.org/doc/html/
draft-ietf-bfd-optimizing-authentication-13>.
[I-D.ietf-bfd-secure-sequence-numbers]
DeKok, A., Jethanandani, M., Agarwal, S., Mishra, A., and
A. Saxena, "Secure BFD Sequence Numbers", Work in
Progress, Internet-Draft, draft-ietf-bfd-secure-sequence-
numbers-12, 29 November 2023,
<https://datatracker.ietf.org/doc/html/draft-ietf-bfd-
secure-sequence-numbers-12>.
[RFC2119] Bradner, S., "Key words for use in RFCs to Indicate
Requirement Levels", BCP 14, RFC 2119,
DOI 10.17487/RFC2119, March 1997,
<https://www.rfc-editor.org/info/rfc2119>.
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[RFC3688] Mealling, M., "The IETF XML Registry", BCP 81, RFC 3688,
DOI 10.17487/RFC3688, January 2004,
<https://www.rfc-editor.org/info/rfc3688>.
[RFC5880] Katz, D. and D. Ward, "Bidirectional Forwarding Detection
(BFD)", RFC 5880, DOI 10.17487/RFC5880, June 2010,
<https://www.rfc-editor.org/info/rfc5880>.
[RFC6020] Bjorklund, M., Ed., "YANG - A Data Modeling Language for
the Network Configuration Protocol (NETCONF)", RFC 6020,
DOI 10.17487/RFC6020, October 2010,
<https://www.rfc-editor.org/info/rfc6020>.
[RFC6241] Enns, R., Ed., Bjorklund, M., Ed., Schoenwaelder, J., Ed.,
and A. Bierman, Ed., "Network Configuration Protocol
(NETCONF)", RFC 6241, DOI 10.17487/RFC6241, June 2011,
<https://www.rfc-editor.org/info/rfc6241>.
[RFC6242] Wasserman, M., "Using the NETCONF Protocol over Secure
Shell (SSH)", RFC 6242, DOI 10.17487/RFC6242, June 2011,
<https://www.rfc-editor.org/info/rfc6242>.
[RFC6991] Schoenwaelder, J., Ed., "Common YANG Data Types",
RFC 6991, DOI 10.17487/RFC6991, July 2013,
<https://www.rfc-editor.org/info/rfc6991>.
[RFC8040] Bierman, A., Bjorklund, M., and K. Watsen, "RESTCONF
Protocol", RFC 8040, DOI 10.17487/RFC8040, January 2017,
<https://www.rfc-editor.org/info/rfc8040>.
[RFC8174] Leiba, B., "Ambiguity of Uppercase vs Lowercase in RFC
2119 Key Words", BCP 14, RFC 8174, DOI 10.17487/RFC8174,
May 2017, <https://www.rfc-editor.org/info/rfc8174>.
[RFC8341] Bierman, A. and M. Bjorklund, "Network Configuration
Access Control Model", STD 91, RFC 8341,
DOI 10.17487/RFC8341, March 2018,
<https://www.rfc-editor.org/info/rfc8341>.
[RFC8349] Lhotka, L., Lindem, A., and Y. Qu, "A YANG Data Model for
Routing Management (NMDA Version)", RFC 8349,
DOI 10.17487/RFC8349, March 2018,
<https://www.rfc-editor.org/info/rfc8349>.
[RFC8446] Rescorla, E., "The Transport Layer Security (TLS) Protocol
Version 1.3", RFC 8446, DOI 10.17487/RFC8446, August 2018,
<https://www.rfc-editor.org/info/rfc8446>.
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[RFC9314] Jethanandani, M., Ed., Rahman, R., Ed., Zheng, L., Ed.,
Pallagatti, S., and G. Mirsky, "YANG Data Model for
Bidirectional Forwarding Detection (BFD)", RFC 9314,
DOI 10.17487/RFC9314, September 2022,
<https://www.rfc-editor.org/info/rfc9314>.
Appendix A. Examples
This section tries to show some examples in how the model can be
configured for stability.
A.1. Single Hop BFD Configuration
This example demonstrates how a Single Hop BFD session can be
configured to enable monitoring of a session for stability.
=============== NOTE: '\' line wrapping per RFC 8792 ===============
<?xml version="1.0" encoding="UTF-8"?>
<key-chains
xmlns="urn:ietf:params:xml:ns:yang:ietf-key-chain"
xmlns:kc="urn:ietf:params:xml:ns:yang:ietf-key-chain">
<key-chain>
<name>bfd-stability-config</name>
<description>"An example for BFD Stabalized configuration."</de\
scription>
<key>
<key-id>55</key-id>
<lifetime>
<send-lifetime>
<start-date-time>2017-01-01T00:00:00Z</start-date-time>
<end-date-time>2017-02-01T00:00:00Z</end-date-time>
</send-lifetime>
<accept-lifetime>
<start-date-time>2016-12-31T23:59:55Z</start-date-time>
<end-date-time>2017-02-01T00:00:05Z</end-date-time>
</accept-lifetime>
</lifetime>
<crypto-algorithm>kc:sha-1</crypto-algorithm>
</key>
</key-chain>
</key-chains>
<interfaces
xmlns="urn:ietf:params:xml:ns:yang:ietf-interfaces"
xmlns:if-type="urn:ietf:params:xml:ns:yang:iana-if-type">
<interface>
<name>eth0</name>
<type>if-type:ethernetCsmacd</type>
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</interface>
</interfaces>
<routing
xmlns="urn:ietf:params:xml:ns:yang:ietf-routing"
xmlns:bfd-types="urn:ietf:params:xml:ns:yang:ietf-bfd-types"
xmlns:stability="urn:ietf:params:xml:ns:yang:ietf-bfd-stability\
">
<control-plane-protocols>
<control-plane-protocol>
<type>bfd-types:bfdv1</type>
<name>name:BFD</name>
<bfd xmlns="urn:ietf:params:xml:ns:yang:ietf-bfd">
<ip-sh xmlns="urn:ietf:params:xml:ns:yang:ietf-bfd-ip-sh">
<sessions>
<session>
<interface>eth0</interface>
<dest-addr>2001:db8:0:113::101</dest-addr>
<desired-min-tx-interval>10000</desired-min-tx-interv\
al>
<required-min-rx-interval>
10000
</required-min-rx-interval>
<stability:stability>true</stability:stability>
<authentication>
<key-chain>bfd-stability-config</key-chain>
<meticulous>true</meticulous>
</authentication>
</session>
</sessions>
</ip-sh>
</bfd>
</control-plane-protocol>
</control-plane-protocols>
</routing>
Authors' Addresses
Ashesh Mishra
Aalyria Technologies
Email: ashesh@aalyria.com
Mahesh Jethanandani
Kloud Services
CA
United States of America
Email: mjethanandani@gmail.com
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Ankur Saxena
Ciena Corporation
3939 North 1st Street
San Jose, CA 95134
United States of America
Email: ankurpsaxena@gmail.com
URI: www.ciena.com
Santosh Pallagatti
VMware
Bangalore 560103
Karnataka
India
Email: santosh.pallagatti@gmail.com
Mach Chen
Huawei
Email: mach.chen@huawei.com
Peng Fan
China Mobile
32 Xuanwumen West Street
Beijing
Beijing,
China
Email: fanp08@gmail.com
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