Network Working Group X. Liu
Internet-Draft Prateek Sarda
Intended status: Standards Track Ericsson
Expires: October 24, 2015 April 24, 2015
A YANG Data Model for Routing Information Protocol (RIP)
draft-liu-rtgwg-yang-rip-00.txt
Abstract
This document describes a data model for Routing Information Protocol
(RIP). Both RIP version 2 and RIPng are covered.
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), its areas, and its working groups. Note that
other groups may also distribute working documents as Internet-
Drafts.
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."
The list of current Internet-Drafts can be accessed at
http://www.ietf.org/ietf/1id-abstracts.txt
The list of Internet-Draft Shadow Directories can be accessed at
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This Internet-Draft will expire on January 1, 2015.
Copyright Notice
Copyright (c) 2015 IETF Trust and the persons identified as the
document authors. All rights reserved.
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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
to this document.
Table of Contents
1. Introduction...................................................2
1.1. Terminology...............................................2
2. RIP YANG model overview........................................3
3. RIP YANG module................................................6
4. Security Considerations.......................................24
5. References....................................................24
5.1. Normative References.....................................24
5.2. Informative References...................................25
1. Introduction
This document introduces a YANG [RFC6020] data model for Routing
Information Protocol (RIP)[RFC2453][RFC2080]. RIP was designed to
work as an Interior Gateway Protocol (IGP) in moderate-size
Autonomous Systems (AS).
This YANG model supports both RIP version 2 and RIPng. RIP version 2
defined in [RFC2453] supports IPv4. RIPng defined in [RFC2080]
supports IPv6.
1.1. Terminology
The keywords "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].
The following terms are defined in [RFC6020] and are not redefined
here:
o augment
o data model
o data node
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2. RIP YANG model overview
This document defines the YANG module "ietf-rip", which has the
following structure:
module: ietf-rip
augment /rt:routing/rt:routing-instance/rt:routing-
protocols/rt:routing-protocol:
+--rw rip
+--rw originate-default-route!
| +--rw route-map? string
+--rw default-metric? uint8
+--rw distance? uint8
+--rw flash-update-threshold? uint8
+--rw maximum-paths? uint8
+--rw output-delay? uint8
+--rw distribute-list* [prefix-list-name in-out]
| +--rw prefix-list-name string
| +--rw in-out boolean
| +--rw if-name? if:interface-ref
+--rw timers
| +--rw update-interval? uint16
| +--rw invalid-interval? uint16
| +--rw holddown-interval? uint16
| +--rw flush-interval? uint16
+--rw interface* [interface]
+--rw interface if:interface-ref
+--rw authentication
| +--rw (scheme)?
| +--:(md5)
| | +--rw md5-key-chain-name? string
| +--:(simple)
| +--rw simple-key-chain-name? string
+--rw cost? uint8
+--rw no-listen? empty
+--rw no-supply? empty
+--rw originate-default-route!
| +--rw route-map? string
+--rw split-horizon? enumeration
+--rw summary-address
| +--rw address? inet:ip-prefix
| +--rw metric? uint8
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+--rw timers
+--rw update-interval? uint16
+--rw invalid-interval? uint16
+--rw holddown-interval? uint16
+--rw flush-interval? uint16
augment /rt:routing-state/rt:routing-instance/rt:routing-
protocols/rt:routing-protocol:
+--ro rip
+--ro originate-default-route!
| +--ro route-map? string
+--ro default-metric? uint8
+--ro distance? uint8
+--ro flash-update-threshold? uint8
+--ro maximum-paths? uint8
+--ro output-delay? uint8
+--ro distribute-list* [prefix-list-name in-out]
| +--ro prefix-list-name string
| +--ro in-out boolean
| +--ro if-name? if:interface-ref
+--ro next-flash-update? uint32
+--ro num-of-routes? uint32
+--ro routing-table-version? uint32
+--ro timers
| +--ro update-interval? uint16
| +--ro invalid-interval? uint16
| +--ro holddown-interval? uint16
| +--ro flush-interval? uint16
+--ro interface* [interface]
| +--ro interface if:interface-ref
| +--ro oper-status? enumeration
| +--ro cost? uint8
| +--ro listen? boolean
| +--ro next-full-update? uint32
| +--ro originate-default-route? boolean
| +--ro poison-reverse? boolean
| +--ro split-horizon? boolean
| +--ro supply? boolean
| +--ro valid-address? boolean
| +--ro timers
| | +--ro update-interval? uint16
| | +--ro invalid-interval? uint16
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| | +--ro holddown-interval? uint16
| | +--ro flush-interval? uint16
| +--ro statistics {interface-statistics}?
| +--ro discontinuity-time? yang:date-and-time
| +--ro bad-packets-rcvd? yang:counter32
| +--ro bad-routes-rcvd? yang:counter32
| +--ro updates-sent? yang:counter32
+--ro routes-ipv4
| +--ro route* [ipv4-prefix]
| +--ro ipv4-prefix inet:ipv4-prefix
| +--ro next-hop? inet:ipv4-address
| +--ro interface? if:interface-ref
| +--ro redistributed? boolean
| +--ro route-type? enumeration
| +--ro metric? uint8
| +--ro expire-time? uint16
| +--ro deleted? boolean
| +--ro holddown? boolean
| +--ro need-flash? boolean
| +--ro need-download-to-rib? boolean
| +--ro inactive? boolean
| +--ro next-hop-flags? bits
+--ro routes-ipv6
| +--ro route* [ipv6-prefix]
| +--ro ipv6-prefix inet:ipv6-prefix
| +--ro next-hop? inet:ipv6-address
| +--ro interface? if:interface-ref
| +--ro redistributed? boolean
| +--ro route-type? enumeration
| +--ro metric? uint8
| +--ro expire-time? uint16
| +--ro deleted? boolean
| +--ro holddown? boolean
| +--ro need-flash? boolean
| +--ro need-download-to-rib? boolean
| +--ro inactive? boolean
| +--ro next-hop-flags? bits
+--ro statistics {global-statistics}?
+--ro discontinuity-time? yang:date-and-time
+--ro requests-rcvd? yang:counter32
+--ro requests-sent? yang:counter32
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+--ro responses-rcvd? yang:counter32
+--ro responses-sent? yang:counter32
rpcs:
+---x clear-rip-route
+--ro input
+--ro instance-name? leafref
3. RIP YANG module
<CODE BEGINS> file "ietf-rip@2015-04-21.yang"
module ietf-rip {
namespace "urn:ietf:params:xml:ns:yang:ietf-rip";
// replace with IANA namespace when assigned
prefix rip;
import ietf-inet-types {
prefix "inet";
}
import ietf-yang-types {
prefix "yang";
}
import ietf-interfaces {
prefix "if";
}
import ietf-ip {
prefix "ip";
}
import ietf-routing {
prefix "rt";
}
organization "TBD";
contact "TBD";
description
"This YANG module defines a model for managing Routing
Information Protocol (RIP), including RIP version 2 and RIPng.";
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revision 2015-04-21 {
description
"Initial revision.";
reference
"RFC 2453: RIP Version 2.
RFC 2080: RIPng for IPv6.
RFC 1724: RIP Version 2 MIB Extension.";
}
/*
* Features
*/
feature global-statistics {
description
"This feature indicates that the system supports collecting
global statistic data.";
}
feature interface-statistics {
description
"This feature indicates that the system supports collecting
per-interface statistic data.";
}
/*
* Identities
*/
identity ripv2 {
base "rt:routing-protocol";
description "RIPv2";
}
identity ripng {
base "rt:routing-protocol";
description "RIPng";
}
/*
* Groupings
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*/
grouping originate-default-route-container {
description
"Container for setting of originating default route.";
container originate-default-route {
presence "Present if originating default route is enabled.";
description
"Injects the default route into the RIP or RIPng
instance.";
leaf route-map {
type string;
description
"The conditions of the route map are applied to the default
route.";
}
}
}
grouping timers-container {
description
"Container for settings of basic timers";
container timers {
must "invalid-interval >= (update-interval * 3)" {
description
"invalid-interval must be at least three times the value
for the update-interval argument.";
}
must "flush-interval > invalid-interval" {
description
"flush-interval must be larger than the value for the
invalid-interval argument";
}
description
"Timers for the specified RIP or RIPng instance or
interface.";
leaf update-interval {
type uint16 {
range 1..32767;
}
units seconds;
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default 30;
description
"Interval at which RIP or RIPng updates are sent.";
}
leaf invalid-interval {
type uint16 {
range 1..32767;
}
units seconds;
default 180;
description
"Interval before a route is declared invalid after no
updates are received. This value is at least three times
the value for the update-interval argument.";
}
leaf holddown-interval {
type uint16 {
range 1..32767;
}
units seconds;
default 180;
description
"Interval before better routes are released.";
}
leaf flush-interval {
type uint16 {
range 1..32767;
}
units seconds;
default 240;
description
"Interval before a route is flushed from the routing
table. This value must be larger than the value for the
invalid-interval argument.";
}
} // timers
}
grouping global-attributes {
description
"Global configuration and state attributes.";
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uses originate-default-route-container;
leaf default-metric {
type uint8 {
range 0..16;
}
default 0;
description
"Set the default metric.";
}
leaf distance {
type uint8 {
range 1..255;
}
default 120;
description
"The administrative distance of the RIP or RIPng for the
current RIP or RIPng instance.";
}
leaf flash-update-threshold {
type uint8 {
range 1..30;
}
units seconds;
default 5;
description
"The minimum interval between consecutive RIP or RIPng
flash updates.";
}
leaf maximum-paths {
type uint8 {
range 1..16;
}
default 8;
description
"The number of multiple equal-cost RIP or RIPng routes
that can be used as the best paths for balancing the load
of outgoing traffic packets.";
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}
leaf output-delay {
type uint8 {
range 1..50;
}
units milliseconds;
description
"A delay time between packets sent in multipacket
RIP or RIPng updates.";
}
} // global-attributes
grouping distribute-lists {
description
"Grouping for distribute lists.";
list distribute-list {
key "prefix-list-name in-out";
description
"List of prefix lists.";
leaf prefix-list-name {
type string;
description
"Reference to a prefix list to be applied to RIP or
RIPng packets.";
}
leaf in-out {
type boolean;
description
"false for 'in', and true for 'out'.";
}
leaf if-name {
type if:interface-ref;
description
"Reference to an interface to which the prefix list is
applied.";
}
}
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} // distribute-lists
grouping route-attributes {
description
"Grouping for route attributes.";
leaf redistributed {
type boolean;
description
"Redistributed routes";
}
leaf route-type {
type enumeration {
enum connected {
description "Connected route.";
}
enum external {
description "External route.";
}
enum external-backup {
description "External backup route.";
}
enum rip {
description "RIP route.";
}
}
description
"Route type.";
}
leaf metric {
type uint8 {
range 0..16;
}
description "Route metric.";
}
leaf expire-time {
type uint16;
description "Expiration time.";
}
leaf deleted {
type boolean;
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description "Deleted route.";
}
leaf holddown {
type boolean;
description "Holddown route.";
}
leaf need-flash {
type boolean;
description "The route needs flash.";
}
leaf need-download-to-rib {
type boolean;
description "The route needs to be downloaded to rib.";
}
leaf inactive {
type boolean;
description "The route is inactive.";
}
leaf next-hop-flags {
type bits {
bit withdrawn-from-rib {
description "The route is withdrawn from rib.";
}
bit holddown {
description "The route is holddown.";
}
bit flush-expire-before-holddown {
description
"The flush timer expired before holddown time.";
}
}
description "The next hop properties of the route.";
}
} // route-attribute
/*
* Configuration data nodes
*/
augment "/rt:routing/rt:routing-instance/rt:routing-protocols/"
+ "rt:routing-protocol" {
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when "rt:type = 'rip:ripv2' or rt:type = 'rip:ripng'" {
description
"This augment is only valid for a routing protocol instance
of RIP (type 'ripv2' or 'ripng').";
}
description "RIP augmentation.";
container rip {
description
"RIP configuration data.";
uses global-attributes;
uses distribute-lists;
uses timers-container;
list interface {
key "interface";
description
"List of RIP interfaces.";
leaf interface {
type if:interface-ref;
must "(../../../rt:type = 'rip:ripv2' and "
+ "/if:interfaces/if:interface[name=current()]/"
+ "ip:ipv4) or "
+ "(../../../rt:type = 'rip:ripng' and "
+ "/if:interfaces/if:interface[name=current()]/"
+ "ip:ipv6)" {
error-message "Invalid interface type.";
description
"RIPv2 can be enabled on IPv4 interfae, and
RIPng can be enabled on IPv6 interface.";
}
description
"Enable RIP on this interface.";
}
container authentication {
when "../../../rt:type = 'rip:ripv2'" {
description "Only applicable to RIPv2.";
}
description
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"Enables authentication and specifies the authentication
scheme for the RIP interface";
choice scheme {
description
"Specify the authentication scheme.
The use of the key-chain reference here is:
1) Designed to align with other proposed protocol
models.
2) Not finalized, pending resolution of alignment with
the RFC published KeyTables information model.";
case md5 {
leaf md5-key-chain-name {
type string;
description
"Message Digest 5 (MD5) authentication key chain
name.";
}
}
case simple {
leaf simple-key-chain-name {
type string;
description
"Simple authentication key chain name.";
}
}
}
}
leaf cost {
type uint8 {
range 1..16;
}
default 1;
description
"Interface cost.";
}
leaf no-listen {
type empty;
description
"Disable the specified interface to receive (listen to)
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and process RIP or RIPng packets.";
}
leaf no-supply {
type empty;
description
"Disables sending of RIP or RIPng packets on the
specified interface.";
}
uses originate-default-route-container;
leaf split-horizon {
type enumeration {
enum simple {
description
"Enables simple split-horizon processing.";
}
enum poison {
description
"Enables split-horizon processing with poison
reverse.";
}
}
default simple;
description
"Enables RIP or RIPng split-horizon processing on the
specified interface.";
}
container summary-address {
description
"Summarizes information about RIP or RIPng routes sent
over the specified interface in RIP or RIPng update
packets.";
leaf address {
type inet:ip-prefix;
description
"IPv4 address, in the form A.B.C.D, and the prefix
length, separated by the slash (/) character;
or IPv6 address, in the form A:B:C:D:E:F:G:H, and the
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prefix length, separated by the slash (/) character.";
}
leaf metric {
type uint8 {
range 0..16;
}
description
"Metric used for the route. If this attribute is not
used, the value set through the default-metric
attribute in RIP or RIPng router configuration is
used for the route. ";
}
}
uses timers-container;
} // interface
} // container rip
}
/*
* Operational state data nodes
*/
augment "/rt:routing-state/rt:routing-instance/"
+ "rt:routing-protocols/rt:routing-protocol" {
when "rt:type = 'rip:ripv2' or rt:type = 'rip:ripng'" {
description
"This augment is only valid for a routing protocol instance
of type 'ripv2' or 'ripng'.";
}
description
"RIP state.";
container rip {
description "RIP operational state.";
uses global-attributes;
uses distribute-lists;
leaf next-flash-update {
type uint32;
description
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"Next flash update.";
}
leaf num-of-routes {
type uint32;
description
"The number of routes.";
}
leaf routing-table-version {
type uint32;
description
"Routing table version.";
}
uses timers-container;
list interface {
key "interface";
description
"List of RIP interfaces.";
leaf interface {
type if:interface-ref;
description
"Enable RIP on this interface.";
}
leaf oper-status {
type enumeration {
enum up {
description
"RIPv2 or RIPng is operational on this interface.";
}
enum down {
description
"RIPv2 or RIPng is not operational on this
interface.";
}
}
description
"Operational state.";
}
leaf cost {
type uint8 {
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range 1..16;
}
default 1;
description
"Interface cost.";
}
leaf listen {
type boolean;
description
"The interface is enabled to receive (listen to)
and process RIP or RIPng packets.";
}
leaf next-full-update {
type uint32;
description
"Next full update time.";
}
leaf originate-default-route {
type boolean;
description
"'true' if originating default route is enabled.";
}
leaf poison-reverse {
type boolean;
description
"'true' if Split Horizon with Poisoned Reverse is
enabled.";
}
leaf split-horizon {
type boolean;
description
"'true' if Split Horizon processing is enabled.";
}
leaf supply {
type boolean;
description
"The interface is enabled to supply (send) RIP or RIPng
packets.";
}
leaf valid-address {
type boolean;
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description
"The interface has a valid address.";
}
uses timers-container;
container statistics {
if-feature interface-statistics;
description
"Interface statistic counters.";
leaf discontinuity-time {
type yang:date-and-time;
description
"The time on the most recent occasion at which any one
or more of the statistic counters suffered a
discontinuity. If no such discontinuities have occurred
since the last re-initialization of the local
management subsystem, then this node contains the time
the local management subsystem re-initialized itself.";
}
leaf bad-packets-rcvd {
type yang:counter32;
description
"The number of RIP invalid packets received by
the RIP process which were subsequently discarded
for any reason (e.g. a version 0 packet, or an
unknown command type).";
}
leaf bad-routes-rcvd {
type yang:counter32;
description
"The number of routes, in valid RIP packets,
which were ignored for any reason (e.g. unknown
address family, or invalid metric).";
}
leaf updates-sent {
type yang:counter32;
description
"The number of triggered RIP updates actually
sent on this interface. This explicitly does
NOT include full updates sent containing new
information.";
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}
}
} // interface
container routes-ipv4 {
when "../../rt:type = 'rip:ripv2'" {
description
"IPv4 routes are from RIPv2.";
}
description
"IPv4 routes.";
list route {
key "ipv4-prefix";
description
"A RIPv2 IPv4 route.";
leaf ipv4-prefix {
type inet:ipv4-prefix;
description
"IP address (in the form A.B.C.D) and prefix length,
separated by the slash (/) character. The range of
values for the prefix-length is 0 to 32.";
}
leaf next-hop {
type inet:ipv4-address;
description
"Next hop IPv4 address.";
}
leaf interface {
type if:interface-ref;
description
"The interface that the route uses.";
}
uses route-attributes;
} // route
} // routes-ipv4
container routes-ipv6 {
when "../../rt:type = 'rip:ripng'" {
description
"IPv6 routes are from RIPng.";
}
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description
"IPv6 routes.";
list route {
key "ipv6-prefix";
description
"A RIPng IPv6 route.";
leaf ipv6-prefix {
type inet:ipv6-prefix;
description
"IP address (in the canonical format defined in
RFC5952)and prefix length, separated by the slash (/)
character. The range of values for the prefix-length
is 0 to 128.";
}
leaf next-hop {
type inet:ipv6-address;
description
"Next hop IPv6 address.";
}
leaf interface {
type if:interface-ref;
description
"The interface that the route uses.";
}
uses route-attributes;
} // route
} // routes-ipv6
container statistics {
if-feature global-statistics;
description
"Global statistic counters.";
leaf discontinuity-time {
type yang:date-and-time;
description
"The time on the most recent occasion at which any one
or more of the statistic counters suffered a
discontinuity. If no such discontinuities have occurred
since the last re-initialization of the local
management subsystem, then this node contains the time
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the local management subsystem re-initialized itself.";
}
leaf requests-rcvd {
type yang:counter32;
description
"The number of requests received by RIP.";
}
leaf requests-sent {
type yang:counter32;
description
"The number of requests sent by RIP.";
}
leaf responses-rcvd {
type yang:counter32;
description
"The number of responses received by RIP.";
}
leaf responses-sent {
type yang:counter32;
description
"The number of responses sent by RIP.";
}
}
} // rip
} // augment
/*
* RPCs
*/
rpc clear-rip-route {
description
"Clears RIP routes from the IP routing table and routes
redistributed into the RIP protocol for the specified RIP
instance or for all RIP instances in the current context.";
input {
leaf instance-name {
type leafref {
path "/rt:routing/rt:routing-instance/"
+ "rt:routing-protocols/rt:routing-protocol/rt:name";
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}
description
"Instance name identifying the specific RIP Instance.";
}
}
} // rcp clear-rip-route
}
<CODE ENDS>
4. Security Considerations
The configuration, state, and action data defined in this document
are designed to be accessed via the NETCONF protocol [RFC6241]. The
data-model by itself does not create any security implications. The
security considerations for the NETCONF protocol are applicable. The
NETCONF protocol used for sending the data supports authentication
and encryption.
5. References
5.1. Normative References
[RFC6020] Bjorklund, M., "YANG - A Data Modeling Language for the
Network Configuration Protocol (NETCONF)", RFC 6020,
October 2010.
[RFC6021] Schoenwaelder, J., "Common YANG Data Types", RFC 6021,
October 2010.
[RFC6241] Enns, R., Bjorklund, M., Schoenwaelder, J., and A. Bierman,
"Network Configuration Protocol (NETCONF)", RFC 6241, June
2011.
[RFC2234] Crocker, D. and Overell, P.(Editors), "Augmented BNF for
Syntax Specifications: ABNF", RFC 2234, Internet Mail
Consortium and Demon Internet Ltd., November 1997.
[RFC2453] G. Malkin, "RIP Version 2", RFC2453, November 1998.
[RFC2080] G. Malkin and R. Minnear, "RIPng for IPv6", RFC2080,
January 1997.
[RFC1724] G. Malkin and F. Baker, "RIP Version 2 MIB Extension",
RFC1724, November 1994.
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5.2. Informative References
[RFC6087] Bierman, A., "Guidelines for Authors and Reviewers of YANG
Data Model Documents", RFC 6087, January 2011.
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Authors' Addresses
Xufeng Liu
Ericsson
1595 Spring Hill Road, Suite 500
Vienna, VA 22182
USA
Email: xufeng.liu@ericsson.com
Prateek Sarda
Ericsson India Global Services Pvt. Ltd.
Fern Icon, Survey No 28 and 36/5, Doddanakundi Village
Bangalore - 560037, Karnataka
India
Email: prateek.sarda@ericsson.com
Liu Expires October 24, 2015 [Page 26]