Network Working Group N. Wu
Internet-Draft S. Zhuang
Intended status: Standards Track Huawei
Expires: September 27, 2015 March 26, 2015
A YANG Data Model for Flow Specification
draft-wu-rtgwg-flowspec-yang-cfg-00
Abstract
This document defines a YANG data model for Flow Specification
implementations. The data model includes configuration data and
state data.
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.
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 http://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 September 7, 2015.
Copyright Notice
Copyright (c) 2015 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
(http://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
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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.
Table of Contents
1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . 2
1.1. Terminology . . . . . . . . . . . . . . . . . . . . . . . 2
1.2. Tree Diagrams . . . . . . . . . . . . . . . . . . . . . . 3
2. Flow Specification data model . . . . . . . . . . . . . . . . 3
3. Flow Specification YANG Module . . . . . . . . . . . . . . . 7
4. IANA Considerations . . . . . . . . . . . . . . . . . . . . . 20
5. Security Considerations . . . . . . . . . . . . . . . . . . . 20
6. Acknowledgments . . . . . . . . . . . . . . . . . . . . . . . 20
7. References . . . . . . . . . . . . . . . . . . . . . . . . . 21
7.1. Normative References . . . . . . . . . . . . . . . . . . 21
7.2. Informative References . . . . . . . . . . . . . . . . . 21
Authors' Addresses . . . . . . . . . . . . . . . . . . . . . . . 21
1. Introduction
This document defines a YANG [RFC6020] data model for Flow
Specification [RFC5575] implementations.
The data model convers configuration of filtering rules and actions
of traffic flow specification. It also provides information about
operational running state of traffic flow specification, which
includes RIB of flow specification route, attributes dedicated to
different protocols and statistics.
1.1. Terminology
The following terms are defined in [RFC6020]:
o configuration data
o data model
o module
o state data
The terminology for describing YANG data models is found in
[RFC6020].
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1.2. Tree Diagrams
A simplified graphical representation of the data model is used in
this document. The meaning of the symbols in these diagrams is as
follows:
o Brackets "[" and "]" enclose list keys.
o Abbreviations before data node names: "rw" means configuration
data (read-write), and "ro" means state data (read-only).
o Symbols after data node names: "?" means an optional node, "!"
means a presence container, and "*" denotes a list and leaf-list.
o Parentheses enclose choice and case nodes, and case nodes are also
marked with a colon (":").
o Ellipsis ("...") stands for contents of subtrees that are not
shown.
2. Flow Specification data model
The data model has the following structure for configuration of
traffic flow specification:
+--rw flowspec-cfg
| +--rw flow-route* [name]
| +--rw name string
| +--rw filter-rules
| | +--rw destination-prefix
| | | +--rw dest-prefix-length? uint8
| | | +--rw dest-prefix? inet:ip-address
| | +--rw source-prefix
| | | +--rw src-prefix-length? uint8
| | | +--rw src-prefix? inet:ip-address
| | +--rw ip-protocol
| | | +--rw op-protocol* [compare-protocol ip-proto]
| | | +--rw compare-protocol compare-ops
| | | +--rw ip-proto ip-protocol-types
| | +--rw port-number
| | | +--rw op-port* [compare-port port]
| | | +--rw compare-port compare-ops
| | | +--rw port uint16
| | +--rw destination-port
| | | +--rw op-destport* [compare-destport dest-port]
| | | +--rw compare-destport compare-ops
| | | +--rw dest-port uint16
| | +--rw source-port
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| | | +--rw op-srcport* [compare-srcport src-port]
| | | +--rw compare-srcport compare-ops
| | | +--rw src-port uint16
| | +--rw icmp-type-value
| | | +--rw op-icmp-type* [compare-icmp-type icmp-type]
| | | +--rw compare-icmp-type compare-ops
| | | +--rw icmp-type uint8
| | +--rw icmp-code-value
| | | +--rw op-code-value* [compare-icmp-code icmp-code]
| | | +--rw compare-icmp-code compare-ops
| | | +--rw icmp-code uint8
| | +--rw tcp-flag
| | | +--rw op-bitmask* [tcp-flag-op tcp-flag-value]
| | | +--rw tcp-flag-op bitmask-ops
| | | +--rw tcp-flag-value uint16
| | +--rw pkt-len
| | | +--rw op-pkt-len* [compare-pkt-len packet-length]
| | | +--rw compare-pkt-len compare-ops
| | | +--rw packet-length uint16
| | +--rw dscp
| | | +--rw op-dscp* [compare-dscp dscp-value]
| | | +--rw compare-dscp compare-ops
| | | +--rw dscp-value dscp-type
| | +--rw fragment
| | +--rw op-fragment* [compare-fragment fragment-mode]
| | +--rw compare-fragment bitmask-ops
| | +--rw fragment-mode fragment-mode-type
| +--rw filter-actions
| +--rw traffic-rate
| | +--rw rate? float
| +--rw redirect
| | +--rw route-target? string
| +--rw traffic-marking
| | +--rw remark-dscp? union
| +--rw traffic-deny
| +--rw deny? boolean
This data model defines the configuration container for traffic flow
specification. In this container, there is a list of configuration
containers per flow specification route, which contains the
configuration for filtering rules and corresponding actions.
The data model has the following structure for state of traffic flow
specification:
+--ro flowspec-state
+--ro flowspec-rib
| +--ro flowspec-route* [index islocal]
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| +--ro index uint32
| +--ro islocal boolean
| +--ro local-name? string
| +--ro neighbor? inet:ip-address
| +--ro duration? uint32
| +--ro filter-rules
| | +--ro destination-prefix
| | | +--ro dest-prefix-length? uint8
| | | +--ro dest-prefix? inet:ip-address
| | +--ro source-prefix
| | | +--ro src-prefix-length? uint8
| | | +--ro src-prefix? inet:ip-address
| | +--ro ip-protocol
| | | +--ro op-protocol* [compare-protocol ip-proto]
| | | +--ro compare-protocol compare-ops
| | | +--ro ip-proto ip-protocol-types
| | +--ro port-number
| | | +--ro op-port* [compare-port port]
| | | +--ro compare-port compare-ops
| | | +--ro port uint16
| | +--ro destination-port
| | | +--ro op-destport* [compare-destport dest-port]
| | | +--ro compare-destport compare-ops
| | | +--ro dest-port uint16
| | +--ro source-port
| | | +--ro op-srcport* [compare-srcport src-port]
| | | +--ro compare-srcport compare-ops
| | | +--ro src-port uint16
| | +--ro icmp-type-value
| | | +--ro op-icmp-type* [compare-icmp-type icmp-type]
| | | +--ro compare-icmp-type compare-ops
| | | +--ro icmp-type uint8
| | +--ro icmp-code-value
| | | +--ro op-code-value* [compare-icmp-code icmp-code]
| | | +--ro compare-icmp-code compare-ops
| | | +--ro icmp-code uint8
| | +--ro tcp-flag
| | | +--ro op-bitmask* [tcp-flag-op tcp-flag-value]
| | | +--ro tcp-flag-op bitmask-ops
| | | +--ro tcp-flag-value uint16
| | +--ro pkt-len
| | | +--ro op-pkt-len* [compare-pkt-len packet-length]
| | | +--ro compare-pkt-len compare-ops
| | | +--ro packet-length uint16
| | +--ro dscp
| | | +--ro op-dscp* [compare-dscp dscp-value]
| | | +--ro compare-dscp compare-ops
| | | +--ro dscp-value dscp-type
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| | +--ro fragment
| | +--ro op-fragment* [compare-fragment fragment-mode]
| | +--ro compare-fragment bitmask-ops
| | +--ro fragment-mode fragment-mode-type
| +--ro filter-actions
| | +--ro traffic-rate
| | | +--ro rate? float
| | +--ro redirect
| | | +--ro route-target? string
| | +--ro traffic-marking
| | | +--ro remark-dscp? union
| | +--ro traffic-deny
| | +--ro deny? boolean
| +--ro protocol-specific
| +--ro (protocol)?
| +--:(bgp)
| | +--ro peer-rid? inet:ipv4-address
| | +--ro isrefclient? boolean
| | +--ro med? uint32
| | +--ro preference? uint32
| | +--ro local-pref? uint8
| | +--ro origin? enumeration
| | +--ro originator? inet:ipv4-address
| | +--ro community? string
| | +--ro ext-community? string
| | +--ro cluster-list? string
| | +--ro path-as? string
| +--:(ospf)
| | +--ro lsa-type? string
| | +--ro ls-id? inet:ipv4-address
| | +--ro advertiser? inet:ipv4-address
| | +--ro area? union
| | +--ro tag? uint32
| +--:(isis)
| +--ro lsp-id? string
| +--ro priority? uint32
| +--ro admin-tag? uint32
+--ro flowspec-statis
This data model defines two state containers for traffic flow
specification. In the first container, there is a list of state
containers per flow specification route, which contains the current
state for filtering rules and actions. In the second container,
there is statistics information for traffic flow specifications.
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3. Flow Specification YANG Module
//<CODE BEGINS> file "ietf-flowspec@2015-02-27.yang"
module ietf-flowspec {
namespace "urn:huawei:params:xml:ns:yang:flowspec";
prefix flowspec;
import ietf-inet-types {
prefix inet;
}
import ietf-yang-types {
prefix yang;
}
organization
"IETF RTGWG (Routing Working Group) 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:jeff.tantsura@ericsson.com>
Editor: Shunwan Zhuang
<mailto:zhuangshunwan@huawei.com>
Editor: Nan Wu
<mailto:eric.wu@huawei.com>";
description
"This module contains a collection of YANG definitions for
configuring flow specification implementations.
Copyright (c) 2014 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
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(http://trustee.ietf.org/license-info)."
revision 2015-02-27 {
description
"Initial revision.";
reference
"draft-ietf-netmod-routing-cfg-16:
A YANG Data Model for Routing Management";
}
/* Typedefs */
typedef compare-ops {
type enumeration {
enum greater-than;
enum less-than;
enum equal;
}
}
typedef bitmask-ops {
type enumeration {
enum match;
enum not;
}
}
typedef ip-protocol-types {
type enumeration {
enum icmp {
value 1;
}
enum igmp {
value 2;
}
enum ipip {
value 4;
}
enum tcp {
value 6;
}
enum egp {
value 8;
}
enum udp {
value 17;
}
enum pv6 {
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value 41;
}
enum rsvp {
value 46;
}
enum gre {
value 47;
}
enum esp {
value 50;
}
enum ospf {
value 89;
}
enum pim {
value 103;
}
}
}
typedef dscp-remarked {
type enumeration {
enum be;
enum cs1;
enum af11;
enum af12;
enum af13;
enum cs2;
enum af21;
enum af22;
enum af23;
enum cs3;
enum af31;
enum af32;
enum af33;
enum cs4;
enum af41;
enum af42;
enum af43;
enum cs5;
enum ef;
enum cs6;
enum cs7;
}
}
typedef dscp-type {
type union {
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type dscp-remarked;
type uint8;
}
}
typedef fragment-mode-type {
type enumeration {
enum fragment {
description
"Indicates that fragments are checked.";
}
enum non-fragment {
description
"Indicates that non-fragmented packets are checked.";
}
enum fragment-spe-first {
description
"Indicates that the first fragmented packet is checked.";
}
}
}
/*Definition from
http://www.ietf.org/mail-archive/web/netmod/current/msg02685.html
*/
typedef float {
type union {
type decimal64 {
fraction-digits 14;
range "-9999.99999999999999 .. 9999.99999999999999";
}
type decimal64 {
fraction-digits 13;
range "-99999.9999999999999 .. 99999.9999999999999";
}
type decimal64 {
fraction-digits 12;
range "-999999.999999999999 .. 999999.999999999999";
}
type decimal64 {
fraction-digits 11;
range "-9999999.99999999999 .. 9999999.99999999999";
}
type decimal64 {
fraction-digits 10;
range "-99999999.9999999999 .. 99999999.9999999999";
}
type decimal64 {
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fraction-digits 9;
range "-999999999.999999999 .. 999999999.999999999";
}
type decimal64 {
fraction-digits 8;
range "-9999999999.99999999 .. 9999999999.99999999";
}
type decimal64 {
fraction-digits 7;
range "-99999999999.9999999 .. 99999999999.9999999";
}
type decimal64 {
fraction-digits 6;
range "-999999999999.999999 .. 999999999999.999999";
}
type decimal64 {
fraction-digits 5;
range "-9999999999999.99999 .. 9999999999999.99999";
}
type decimal64 {
fraction-digits 4;
range "-99999999999999.9999 .. 99999999999999.9999";
}
type decimal64 {
fraction-digits 3;
range "-999999999999999.999 .. 999999999999999.999";
}
type decimal64 {
fraction-digits 2;
range "-9999999999999999.99 .. 9999999999999999.99";
}
type decimal64 {
fraction-digits 1;
range "-99999999999999999.9 .. 99999999999999999.9";
}
}
}
/* Grouping definition */
grouping flow-filter-rule {
container destination-prefix {
leaf dest-prefix-length {
type uint8;
description
"Specifies the mask length.";
}
leaf dest-prefix {
type inet:ip-address;
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description
"Specifies the destination address of the traffic.";
}
}
container source-prefix {
leaf src-prefix-length {
type uint8;
description
"Specifies the mask length.";
}
leaf src-prefix {
type inet:ip-address;
description
"Specifies the source IP address of the traffic.";
}
}
container ip-protocol {
list op-protocol {
key "compare-protocol ip-proto";
leaf compare-protocol {
type compare-ops;
description
"Indicates the comparing relationship between the destination
port number and the specified one.";
}
leaf ip-proto {
type ip-protocol-types;
description
"Specifies a protocol type with a name or number.";
}
}
}
container port-number {
list op-port {
key "compare-port port";
leaf compare-port {
type compare-ops;
description
"Specifies the operation symbol of comparing source
or destination port numbers.";
}
leaf port {
type uint16;
description
"Specifies the port number.";
}
}
}
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container destination-port {
list op-destport {
key "compare-destport dest-port";
leaf compare-destport {
type compare-ops;
description
"Specifies the operation symbol of comparing
destination port numbers with designated value.";
}
leaf dest-port {
type uint16;
description
"Specifies the destination port number of the traffic.";
}
}
}
container source-port {
list op-srcport {
key "compare-srcport src-port";
leaf compare-srcport {
type compare-ops;
description
"Specifies the operation symbol of comparing
source port numbers with designated value.";
}
leaf src-port {
type uint16;
description
"Specifies the source port number of the traffic.";
}
}
}
container icmp-type-value {
list op-icmp-type {
key "compare-icmp-type icmp-type";
leaf compare-icmp-type {
type compare-ops;
description
"Specifies the operation symbol of comparing
icmp type value with designated value.";
}
leaf icmp-type {
type uint8;
description
"Specifies the ICMP packet type.";
}
}
}
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container icmp-code-value {
list op-code-value {
key "compare-icmp-code icmp-code";
leaf compare-icmp-code {
type compare-ops;
description
"Specifies the operation symbol of comparing
icmp code value with designated value.";
}
leaf icmp-code {
type uint8;
description
"Specifies the ICMP packet code.";
}
}
}
container tcp-flag {
list op-bitmask {
key "tcp-flag-op tcp-flag-value";
leaf tcp-flag-op {
type bitmask-ops;
description
"Indicates that traffic matching the TCP flag value
can or can not pass the filtering rule.";
}
leaf tcp-flag-value {
type uint16;
description
"Specifies the TCP flag value.";
}
}
}
container pkt-len {
list op-pkt-len {
key "compare-pkt-len packet-length";
leaf compare-pkt-len {
type compare-ops;
description
"Specifies the operation symbol of comparing
packet length with designated value.";
}
leaf packet-length {
type uint16;
description
"Specifies IP packet length.";
}
}
}
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container dscp {
list op-dscp {
key "compare-dscp dscp-value";
leaf compare-dscp {
type compare-ops;
description
"Specifies the operation symbol of comparing
dscp value with designated value.";
}
leaf dscp-value {
type dscp-type;
description
"Specifies the DSCP value.";
}
}
}
container fragment {
list op-fragment {
key "compare-fragment fragment-mode";
leaf compare-fragment {
type bitmask-ops;
description
"Indicates that traffic matching the fragment type
or not can pass the filtering rule.";
}
leaf fragment-mode {
type fragment-mode-type;
description
"Indicates the fragment mode that is checked.";
}
}
}
}
grouping flow-filter-action {
container traffic-rate {
leaf rate {
type float;
description
"Specifies the traffic rate in IEEE floating point
[IEEE.754.1985] format, units being bytes per second.";
}
}
container redirect {
leaf route-target {
type string {
length "3..21";
}
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description
"Specifies the name of a target VPN to which
attack traffic is redirected.";
}
}
container traffic-marking {
leaf remark-dscp {
type union {
type dscp-remarked;
type uint8 {
range "0..63";
}
}
description
"Specifies a re-marked DSCP value.";
}
}
container traffic-deny {
leaf deny {
type boolean;
description
"Enables a device to discard the traffic matching
a filtering rule.";
}
}
}
grouping flow-proto-specific {
choice protocol {
case bgp {
leaf peer-rid {
type inet:ipv4-address;
}
leaf isrefclient {
type boolean;
}
leaf med {
type uint32;
}
leaf preference {
type uint32;
}
leaf local-pref {
type uint8;
}
leaf origin {
type enumeration {
enum igp {
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value "0";
}
enum egp {
value "1";
}
enum incomplete {
value "2";
}
}
}
leaf originator {
type inet:ipv4-address;
}
leaf community {
type string;
}
leaf ext-community {
type string;
}
leaf cluster-list {
type string;
}
leaf path-as {
type string;
}
}
case ospf {
leaf lsa-type {
type string;
}
leaf ls-id {
type inet:ipv4-address;
}
leaf advertiser {
type inet:ipv4-address;
}
leaf area {
type union {
type uint32;
type inet:ipv4-address;
}
}
leaf tag {
type uint32;
}
}
case isis {
leaf lsp-id {
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type string;
}
leaf priority {
type uint32;
}
leaf admin-tag {
type uint32;
}
}
}
}
/* Configuration data nodes */
container flowspec-cfg {
description
"Configuration for flow specification.";
list flow-route {
key "name";
description
"Configuration of a flow route list.";
leaf name {
description
"The name of a flow route.";
type string;
}
container filter-rules {
description
"Configuration for filter rules.";
uses flow-filter-rule;
}
container filter-actions {
description
"Configuration for filter actions.";
uses flow-filter-action;
}
}
}
/* Operational state data nodes */
container flowspec-state {
config "false";
description
"Operational state of flow specification.";
container flowspec-rib {
list flowspec-route {
key "index islocal";
leaf index {
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type uint32;
description
"Flow Specification route index.";
}
leaf islocal {
type boolean;
description
"Locally configured Flow Specification route.";
}
leaf local-name {
type string;
description
"The name of locally configured Flow Specification route.";
}
leaf neighbor {
type inet:ip-address;
description
"IP address of an advertising device";
}
leaf duration {
type uint32;
description
"Route duration in seconds.";
}
container filter-rules {
description
"Indicate current state for filter rules.";
uses flow-filter-rule;
}
container filter-actions {
description
"Indicate current state for filter actions.";
uses flow-filter-action;
}
container protocol-specific {
description
"Indicate current state of protocol specific attributes.";
uses flow-proto-specific;
}
}
}
container flowspec-statis {
}
}
}
//<CODE ENDS>
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4. IANA Considerations
This document registers a URI in the "IETF XML Registry" [RFC3688].
Following the format in RFC 3688, the following registration has been
made.
URI: urn:ietf:params:xml:ns:yang:ietf-flowspec
Registrant Contact: The RTGWG WG of the IETF.
XML: N/A; the requested URI is an XML namespace.
This document registers a YANG module in the "YANG Module Names"
registry [RFC6020].
Name: ietf-flowspec
Namespace: urn:ietf:params:xml:ns:yang:ietf-flowspec
Prefix: flowspec
Reference: RFC XXXX
5. Security Considerations
The YANG module defined in this memo is designed to be accessed via
the NETCONF protocol [RFC6241]. The lowest NETCONF layer is the
secure transport layer and the mandatory-to-implement secure
transport is SSH [RFC6242]. The NETCONF access control model
[RFC6536] provides the means to restrict access for particular
NETCONF users to a pre-configured subset of all available NETCONF
protocol operations and content.
There are a number of data nodes defined in the YANG module which are
writable/creatable/deletable (i.e., config true, which is the
default). These data nodes may be considered sensitive or vulnerable
in some network environments. Write operations (e.g., <edit-config>)
to these data nodes without proper protection can have a negative
effect on network operations.
6. Acknowledgments
TBD.
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7. References
7.1. Normative References
[RFC3688] Mealling, M., "The IETF XML Registry", BCP 81, RFC 3688,
January 2004.
[RFC5575] Marques, P., Sheth, N., Raszuk, R., Greene, B., Mauch, J.,
and D. McPherson, "Dissemination of Flow Specification
Rules", RFC 5575, August 2009.
[RFC6020] Bjorklund, M., "YANG - A Data Modeling Language for the
Network Configuration Protocol (NETCONF)", RFC 6020,
October 2010.
[RFC6241] Enns, R., Bjorklund, M., Schoenwaelder, J., and A.
Bierman, "Network Configuration Protocol (NETCONF)", RFC
6241, June 2011.
[RFC6242] Wasserman, M., "Using the NETCONF Protocol over Secure
Shell (SSH)", RFC 6242, June 2011.
[RFC6536] Bierman, A. and M. Bjorklund, "Network Configuration
Protocol (NETCONF) Access Control Model", RFC 6536, March
2012.
7.2. Informative References
[I-D.liang-ospf-flowspec-extensions]
Liang, Q., You, J., and N. Wu, "OSPF Extensions for Flow
Specification", draft-liang-ospf-flowspec-extensions-02
(work in progress), November 2014.
[I-D.you-isis-flowspec-extensions]
You, J. and Q. Liang, "IS-IS Extensions for Flow
Specification", draft-you-isis-flowspec-extensions-00
(work in progress), September 2014.
[RFC2119] Bradner, S., "Key words for use in RFCs to Indicate
Requirement Levels", BCP 14, RFC 2119, March 1997.
Authors' Addresses
Wu & Zhuang Expires September 7, 2015 [Page 21]
Internet-Draft YANG for Flowspec March 2015
Nan Wu
Huawei
Huawei Bld., No.156 Beiqing Rd.
Beijing 100095
China
Email: eric.wu@huawei.com
Shunwan Zhuang
Huawei
Huawei Bld., No.156 Beiqing Rd.
Beijing 100095
China
Email: zhuangshunwan@huawei.com
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