YANG Model for QoS Operational Parameters
draft-asechoud-rtgwg-qos-oper-model-04
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| Authors | Aseem Choudhary , Ing-Wher (Helen) Chen | ||
| Last updated | 2019-07-02 (Latest revision 2019-01-02) | ||
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draft-asechoud-rtgwg-qos-oper-model-04
Network Working Group A. Choudhary
Internet-Draft Cisco Systems
Intended status: Standards Track I. Chen
Expires: January 2, 2020 Jabil
Jul 01, 2019
YANG Model for QoS Operational Parameters
draft-asechoud-rtgwg-qos-oper-model-04
Abstract
This document describes a YANG model for Quality of Service (QoS)
operational parameters.
Status of This Memo
This Internet-Draft is submitted in full conformance with the
provisions of BCP 78 and BCP 79.
Internet-Drafts are working documents of the Internet Engineering
Task Force (IETF). Note that other groups may also distribute
working documents as Internet-Drafts. The list of current Internet-
Drafts is at https://datatracker.ietf.org/drafts/current/.
Internet-Drafts are draft documents valid for a maximum of six months
and may be updated, replaced, or obsoleted by other documents at any
time. It is inappropriate to use Internet-Drafts as reference
material or to cite them other than as "work in progress."
This Internet-Draft will expire on January 2, 2020.
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.
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Table of Contents
1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . 2
1.1. Tree Diagrams . . . . . . . . . . . . . . . . . . . . . . 2
2. Terminology . . . . . . . . . . . . . . . . . . . . . . . . . 3
3. QoS Operational Model Design . . . . . . . . . . . . . . . . 3
4. Modules Tree Structure . . . . . . . . . . . . . . . . . . . 4
5. Modules . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
5.1. IETF-QOS-OPER . . . . . . . . . . . . . . . . . . . . . . 6
6. Security Considerations . . . . . . . . . . . . . . . . . . . 12
7. Acknowledgement . . . . . . . . . . . . . . . . . . . . . . . 12
8. References . . . . . . . . . . . . . . . . . . . . . . . . . 12
8.1. Normative References . . . . . . . . . . . . . . . . . . 12
8.2. Informative References . . . . . . . . . . . . . . . . . 13
Authors' Addresses . . . . . . . . . . . . . . . . . . . . . . . 13
1. Introduction
This document defines a base YANG [RFC6020] [RFC7950] data module for
Quality of Service (QoS) operational parameters. Remote Procedure
Calls (RPC) or notification definition is currently not part of this
document and will be added later if necessary. QoS configuration
modules are defined by [I-D.asechoud-rtgwg-qos-model].
This document doesn't include operational parameters for random-
detect (RED), which is left to individual vendor to augment it.
Editorial Note: (To be removed by RFC Editor)
This draft contains several placeholder values that need to be
replaced with finalized values at the time of publication. Please
apply the following replacements: o "XXXX" --> the assigned RFC value
for this draft both in this draft and in the YANG models under the
revision statement. o The "revision" date in model, in the format
XXXX-XX-XX, needs to be updated with the date the draft gets
approved.
The YANG modules in this document conform to the Network Management
Datastore Architecture (NMDA) [RFC8342].
1.1. Tree Diagrams
Tree diagrams used in this document follow the notation defined in
[RFC8340]
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2. Terminology
The key words "MUST", "MUST NOT", "REQUIRED", "SHALL", "SHALL NOT",
"SHOULD", "SHOULD NOT", "RECOMMENDED", "NOT RECOMMENDED", "MAY", and
"OPTIONAL" in this document are to be interpreted as described in BCP
14 [RFC2119] [RFC8174] when, and only when, they appear in all
capitals, as shown here.
3. QoS Operational Model Design
QoS operational model include QoS policy applied to an interface in
each direction of traffic. For each QoS policy applied to an
interface the model further includes counters for associated
Classifiers, Meters and Queues in a particular direction. To
modularize and for reusability, grouping have been defined for
various counters of Classfier, Meters and Queues. The target is
assumed to be interface but the groupings can be used for any other
target type where QoS policy is applied.
[I-D.asechoud-rtgwg-qos-model] defines various building blocks for
applying a QoS Policy on a target. It includes QoS Policy
configuration, which is a container of various classifiers and
corresponding actions which are configured for traffic conditioning.
This drafts defines the various counters for these building
blocks.ietf-qos-oper module defined in this draft augments ietf-
interfaces [RFC8343] module.
Classifier statistics contains counters for packets and bytes matched
to the traffic in a direction and also average rate at which traffic
is hitting a classifier. Classification criterion may be based on
IP, MPLS or Ethernet. Counters defined in this draft are agnostic to
underlying dataplane technology.
Statistics of meter is modeled based on commonly used alogrithms in
industry, Single Rate Tri Color Marking (srTCM) [RFC2697] meter, Two
Rate Tri Color Marking (trTCM) [RFC2698] meter. Metering statistics
includes counters corresponding to various rates configured. A
metering container is referred by a metering identifier. This
identifier could be a classifier name if the metering configuration
is inline with classifier or it could be metering template name if
the metering is configured as separate entity and associated with the
classifier.
Queuing statistics includes counters corresponding to various queues
associated with the policy. A queuing container is referred by
queuing identifier. This identifier could be a classifier name if
the queuing configuration is inline with classifier and hence there
is one-to-one mapping between a classfier and a queue or it could be
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a separate queue identifier if one or more than one classifiers are
associated with a queue.
4. Modules Tree Structure
This document defines counters for classifiers, meters and queues.
Classifier statistics consists of list of classifier entries
identified by a classifier entry name. Classifier counters include
matched packets, bytes and average rate of traffic matching a
particular classifier.
Metering statistics consists of meters identified by an identifier.
Metering counters include conform, exceed, violate and drop packets
and bytes.
Queuing counters include instantaneous, peak, average queue length,
as well as output conform, exceed, tail drop packes and bytes.
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module: ietf-qos-oper
augment /if:interfaces/if:interface:
+--ro qos-interface-statistics
+--ro qos-stats-per-direction*
+--ro direction? identityref
+--ro qos-classifier-statistics*
| +--ro policy-name? string
| +--ro classifier-entry-name? string
| +--ro classifier-entry-statistics
| +--ro classified-pkts? uint64
| +--ro classified-bytes? uint64
| +--ro classified-rate? uint64
+--ro qos-named-statistics*
| +--ro stats-name? string
| +--ro pkts? uint64
| +--ro bytes? uint64
| +--ro rate? uint64
+--ro metering-statistics*
| +--ro policy-name? string
| +--ro meter-id? string
| +--ro conform-pkts? uint64
| +--ro conform-bytes? uint64
| +--ro conform-rate? uint64
| +--ro exceed-pkts? uint64
| +--ro exceed-bytes? uint64
| +--ro exceed-rate? uint64
| +--ro violate-pkts? uint64
| +--ro violate-bytes? uint64
| +--ro violate-rate? uint64
| +--ro meter-drop-pkts? uint64
| +--ro meter-drop-bytes? uint64
+--ro queueing-statistics*
+--ro policy-name? string
+--ro queue-id? string
+--ro queuing-statistics
+--ro output-conform-pkts? uint64
+--ro output-conform-bytes? uint64
+--ro output-exceed-pkts? uint64
+--ro output-exceed-bytes? uint64
+--ro queue-current-size-bytes? uint64
+--ro queue-average-size-bytes? uint64
+--ro queue-peak-size-bytes? uint64
+--ro tailed-drop-pkts? uint64
+--ro tailed-drop-bytes? uint64
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5. Modules
5.1. IETF-QOS-OPER
<CODE BEGINS>file "ietf-qos-oper.yang"
module ietf-qos-oper {
yang-version 1.1;
namespace "urn:ietf:params:xml:ns:yang:ietf-qos-oper";
prefix oper;
import ietf-interfaces {
prefix if;
reference "RFC8343: A YANG Data Model for Interface Management";
}
organization "IETF RTG (Routing Area) Working Group";
contact
"WG Web: <http://tools.ietf.org/wg/rtgwg/>
WG List: <mailto:rtgwg@ietf.org>
WG Chair: Chris Bowers
<mailto:cbowers@juniper.net>
WG Chair: Jeff Tantsura
<mailto:jefftant.ietf@gmail.com>
Editor: Aseem Choudhary
<mailto:asechoud@cisco.com>";
description
"This module contains a collection of YANG definitions for
configuring qos specification implementations.
Copyright (c) 2019 IETF Trust and the persons identified as
authors of the code. All rights reserved.
Redistribution and use in source and binary forms, with or
without modification, is permitted pursuant to, and subject
to the license terms contained in, the Simplified BSD License
set forth in Section 4.c of the IETF Trust's Legal Provisions
Relating to IETF Documents
(http://trustee.ietf.org/license-info).
This version of this YANG module is part of RFC XXXX; see
the RFC itself for full legal notices.";
revision 2019-06-28 {
description
"Latest revision qos based policy applied to a target";
reference "RFC XXXX: YANG Model for QoS Operational Parameters";
}
identity direction {
description
"This is identity of traffic direction";
}
identity inbound {
base direction;
description
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"Direction of traffic coming into the network entry";
}
identity outbound {
base direction;
description
"Direction of traffic going out of the network entry";
}
grouping classifier-entry-stats {
description
"Classifier Counters";
container classifier-entry-statistics {
config false;
description
"
This group defines the classifier filter statistics of
each classifier entry
";
leaf classified-pkts {
type uint64;
description
"Number of total packets which filtered
to a classifier-entry";
}
leaf classified-bytes {
type uint64;
description
"Number of total bytes which filtered
to a classifier-entry";
}
leaf classified-rate {
type uint64;
units "bits-per-second";
description
" Rate of average data flow through a
classifier-entry";
}
}
}
grouping qos-named-stats {
description
"QoS matching statistics associated with a stats-name";
leaf pkts {
type uint64;
description
" Number of total matched packets associated
to a statistics name";
}
leaf bytes {
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type uint64;
description
" Number of total matched bytes associated
to a statistics name";
}
leaf rate {
type uint64;
units "bits-per-second";
description
" Rate of average matched data which is associated
to a statistics name";
}
}
grouping queuing-stats {
description
"Queuing Counters";
container queuing-statistics {
description
"queue related statistics ";
leaf output-conform-pkts {
type uint64;
description
"Number of packets transmitted from queue which conform
to min-rate";
}
leaf output-conform-bytes {
type uint64;
description
"Number of bytes transmitted from queue conform to
min-rate";
}
leaf output-exceed-pkts {
type uint64;
description
"Number of packets transmitted from queue which exceed
min-rate but conform to max-rate";
}
leaf output-exceed-bytes {
type uint64;
description
"Number of bytes transmitted from queue which exceed
min-rate but conform to max-rate ";
}
leaf queue-current-size-bytes {
type uint64;
description
"Number of bytes currently buffered ";
}
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leaf queue-average-size-bytes {
type uint64;
description
"Average queue size in number of bytes";
}
leaf queue-peak-size-bytes {
type uint64;
description
"Peak buffer queue size in bytes ";
}
leaf tailed-drop-pkts {
type uint64; description
"Total number of packets tail-dropped ";
}
leaf tailed-drop-bytes {
type uint64;
description
"Total number of bytes tail-dropped ";
}
}
}
grouping meter-stats {
description
"Metering Statistics";
leaf conform-pkts {
type uint64;
description
"Number of conform packets";
}
leaf conform-bytes {
type uint64;
description
"Number of bytes of conform packets";
}
leaf conform-rate {
type uint64;
units "bits-per-second";
description
"Traffic Rate measured as conformimg";
}
leaf exceed-pkts {
type uint64;
description
"Number of packets counted as exceeding";
}
leaf exceed-bytes {
type uint64;
description
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"Bytes of packets counted as exceeding";
}
leaf exceed-rate {
type uint64;
units "bits-per-second";
description
"Traffic Rate measured as exceeding";
}
leaf violate-pkts {
type uint64;
description
"Number of packets counted as violating";
}
leaf violate-bytes {
type uint64;
description
"Bytes of packets counted as violating";
}
leaf violate-rate {
type uint64;
units "bits-per-second";
description
"Traffic Rate measured as violating";
}
leaf meter-drop-pkts {
type uint64;
description
"Number of packets dropped by meter";
}
leaf meter-drop-bytes {
type uint64;
description
"Bytes of packets dropped by meter";
}
}
augment "/if:interfaces/if:interface" {
description
"Augments Qos Target Entry to Interface module";
container qos-interface-statistics {
config false;
description
"Qos Interface statistics";
list qos-stats-per-direction {
description
"Qos Interface statistics for ingress or egress direction";
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leaf direction {
type identityref {
base direction;
}
description
"Direction fo the traffic flow either inbound or
outbound";
}
list qos-classifier-statistics {
description
"Classifier Statistics for each Classifier Entry in a
Policy applied in a particular direction";
leaf policy-name {
type string;
description
"Policy entry name";
}
leaf classifier-entry-name {
type string;
description
"Classifier Entry Name";
}
uses classifier-entry-stats;
}
list qos-named-statistics {
config false;
description
"Matched Statistics for a statistics-name";
leaf stats-name {
type string;
description
"Statistics name";
}
uses qos-named-stats;
}
list metering-statistics {
config false;
description
"Statistics for each Meter associated with the Policy";
reference
"RFC2697: A Single Rate Three Color Marker,
RFC2698: A Two Rate Three Color Marker";
leaf policy-name {
type string;
description
"Policy entry name";
}
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leaf meter-id {
type string;
description
"Meter Identifier";
}
uses meter-stats;
}
list queueing-statistics {
config false;
description
"Statistics for each Queue associated with the Policy";
leaf policy-name {
type string;
description
"Policy entry name";
}
leaf queue-id {
type string;
description
"Queue Identifier";
}
uses queuing-stats;
}
}
}
}
}
<CODE ENDS>
6. Security Considerations
7. Acknowledgement
8. References
8.1. Normative References
[I-D.asechoud-rtgwg-qos-model]
Choudhary, A., Jethanandani, M., Strahle, N., Aries, E.,
and I. Chen, "YANG Model for QoS", draft-asechoud-rtgwg-
qos-model-09 (work in progress), May 2019.
[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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[RFC2697] Heinanen, J. and R. Guerin, "A Single Rate Three Color
Marker", RFC 2697, DOI 10.17487/RFC2697, September 1999,
<https://www.rfc-editor.org/info/rfc2697>.
[RFC2698] Heinanen, J. and R. Guerin, "A Two Rate Three Color
Marker", RFC 2698, DOI 10.17487/RFC2698, September 1999,
<https://www.rfc-editor.org/info/rfc2698>.
[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>.
[RFC7950] Bjorklund, M., Ed., "The YANG 1.1 Data Modeling Language",
RFC 7950, DOI 10.17487/RFC7950, August 2016,
<https://www.rfc-editor.org/info/rfc7950>.
[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>.
[RFC8342] Bjorklund, M., Schoenwaelder, J., Shafer, P., Watsen, K.,
and R. Wilton, "Network Management Datastore Architecture
(NMDA)", RFC 8342, DOI 10.17487/RFC8342, March 2018,
<https://www.rfc-editor.org/info/rfc8342>.
[RFC8343] Bjorklund, M., "A YANG Data Model for Interface
Management", RFC 8343, DOI 10.17487/RFC8343, March 2018,
<https://www.rfc-editor.org/info/rfc8343>.
8.2. Informative References
[RFC8340] Bjorklund, M. and L. Berger, Ed., "YANG Tree Diagrams",
BCP 215, RFC 8340, DOI 10.17487/RFC8340, March 2018,
<https://www.rfc-editor.org/info/rfc8340>.
Authors' Addresses
Aseem Choudhary
Cisco Systems
170 W. Tasman Drive
San Jose, CA 95134
US
Email: asechoud@cisco.com
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Ing-Wher Chen
Jabil
Email: ing-wher_chen@jabil.com
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