RFC 8349
A YANG Data Model for Routing Management (NMDA Version)
7. Routing Management YANG Module
<CODE BEGINS> file "ietf-routing@2018-03-13.yang" module ietf-routing { yang-version "1.1"; namespace "urn:ietf:params:xml:ns:yang:ietf-routing"; prefix "rt"; import ietf-yang-types { prefix "yang"; } import ietf-interfaces { prefix "if"; description "An 'ietf-interfaces' module version that is compatible with the Network Management Datastore Architecture (NMDA) is required."; } organization "IETF NETMOD (Network Modeling) Working Group"; contact "WG Web: <https://datatracker.ietf.org/wg/netmod/> WG List: <mailto:rtgwg@ietf.org> Editor: Ladislav Lhotka <mailto:lhotka@nic.cz> Acee Lindem <mailto:acee@cisco.com> Yingzhen Qu <mailto:yingzhen.qu@huawei.com>"; description "This YANG module defines essential components for the management of a routing subsystem. The model fully conforms to the Network Management Datastore Architecture (NMDA). Copyright (c) 2018 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 (https://trustee.ietf.org/license-info).
This version of this YANG module is part of RFC 8349; see
the RFC itself for full legal notices.";
revision 2018-03-13 {
description
"Network Management Datastore Architecture (NMDA) revision.";
reference
"RFC 8349: A YANG Data Model for Routing Management
(NMDA Version)";
}
revision 2016-11-04 {
description
"Initial revision.";
reference
"RFC 8022: A YANG Data Model for Routing Management";
}
/* Features */
feature multiple-ribs {
description
"This feature indicates that the server supports
user-defined RIBs.
Servers that do not advertise this feature SHOULD provide
exactly one system-controlled RIB per supported address family
and also make it the default RIB. This RIB then appears as an
entry in the list '/routing/ribs/rib'.";
}
feature router-id {
description
"This feature indicates that the server supports an explicit
32-bit router ID that is used by some routing protocols.
Servers that do not advertise this feature set a router ID
algorithmically, usually to one of the configured IPv4
addresses. However, this algorithm is implementation
specific.";
}
/* Identities */
identity address-family {
description
"Base identity from which identities describing address
families are derived.";
}
identity ipv4 {
base address-family;
description
"This identity represents an IPv4 address family.";
}
identity ipv6 {
base address-family;
description
"This identity represents an IPv6 address family.";
}
identity control-plane-protocol {
description
"Base identity from which control-plane protocol identities are
derived.";
}
identity routing-protocol {
base control-plane-protocol;
description
"Identity from which Layer 3 routing protocol identities are
derived.";
}
identity direct {
base routing-protocol;
description
"Routing pseudo-protocol that provides routes to directly
connected networks.";
}
identity static {
base routing-protocol;
description
"'Static' routing pseudo-protocol.";
}
/* Type Definitions */
typedef route-preference {
type uint32;
description
"This type is used for route preferences.";
}
/* Groupings */
grouping address-family {
description
"This grouping provides a leaf identifying an address
family.";
leaf address-family {
type identityref {
base address-family;
}
mandatory true;
description
"Address family.";
}
}
grouping router-id {
description
"This grouping provides a router ID.";
leaf router-id {
type yang:dotted-quad;
description
"A 32-bit number in the form of a dotted quad that is used by
some routing protocols identifying a router.";
reference
"RFC 2328: OSPF Version 2";
}
}
grouping special-next-hop {
description
"This grouping provides a leaf with an enumeration of special
next hops.";
leaf special-next-hop {
type enumeration {
enum blackhole {
description
"Silently discard the packet.";
}
enum unreachable {
description
"Discard the packet and notify the sender with an error
message indicating that the destination host is
unreachable.";
}
enum prohibit {
description
"Discard the packet and notify the sender with an error
message indicating that the communication is
administratively prohibited.";
}
enum receive {
description
"The packet will be received by the local system.";
}
}
description
"Options for special next hops.";
}
}
grouping next-hop-content {
description
"Generic parameters of next hops in static routes.";
choice next-hop-options {
mandatory true;
description
"Options for next hops in static routes.
It is expected that further cases will be added through
augments from other modules.";
case simple-next-hop {
description
"This case represents a simple next hop consisting of the
next-hop address and/or outgoing interface.
Modules for address families MUST augment this case with a
leaf containing a next-hop address of that address
family.";
leaf outgoing-interface {
type if:interface-ref;
description
"Name of the outgoing interface.";
}
}
case special-next-hop {
uses special-next-hop;
}
case next-hop-list {
container next-hop-list {
description
"Container for multiple next hops.";
list next-hop {
key "index";
description
"An entry in a next-hop list.
Modules for address families MUST augment this list
with a leaf containing a next-hop address of that
address family.";
leaf index {
type string;
description
"A user-specified identifier utilized to uniquely
reference the next-hop entry in the next-hop list.
The value of this index has no semantic meaning
other than for referencing the entry.";
}
leaf outgoing-interface {
type if:interface-ref;
description
"Name of the outgoing interface.";
}
}
}
}
}
}
grouping next-hop-state-content {
description
"Generic state parameters of next hops.";
choice next-hop-options {
mandatory true;
description
"Options for next hops.
It is expected that further cases will be added through
augments from other modules, e.g., for recursive
next hops.";
case simple-next-hop {
description
"This case represents a simple next hop consisting of the
next-hop address and/or outgoing interface.
Modules for address families MUST augment this case with a
leaf containing a next-hop address of that address
family.";
leaf outgoing-interface {
type if:interface-ref;
description
"Name of the outgoing interface.";
}
}
case special-next-hop {
uses special-next-hop;
}
case next-hop-list {
container next-hop-list {
description
"Container for multiple next hops.";
list next-hop {
description
"An entry in a next-hop list.
Modules for address families MUST augment this list
with a leaf containing a next-hop address of that
address family.";
leaf outgoing-interface {
type if:interface-ref;
description
"Name of the outgoing interface.";
}
}
}
}
}
}
grouping route-metadata {
description
"Common route metadata.";
leaf source-protocol {
type identityref {
base routing-protocol;
}
mandatory true;
description
"Type of the routing protocol from which the route
originated.";
}
leaf active {
type empty;
description
"The presence of this leaf indicates that the route is
preferred among all routes in the same RIB that have the
same destination prefix.";
}
leaf last-updated {
type yang:date-and-time;
description
"Timestamp of the last modification of the route. If the
route was never modified, it is the time when the route was
inserted into the RIB.";
}
}
/* Data nodes */
container routing {
description
"Configuration parameters for the routing subsystem.";
uses router-id {
if-feature "router-id";
description
"Support for the global router ID. Routing protocols
that use a router ID can use this parameter or override it
with another value.";
}
container interfaces {
config false;
description
"Network-layer interfaces used for routing.";
leaf-list interface {
type if:interface-ref;
description
"Each entry is a reference to the name of a configured
network-layer interface.";
}
}
container control-plane-protocols {
description
"Support for control-plane protocol instances.";
list control-plane-protocol {
key "type name";
description
"Each entry contains a control-plane protocol instance.";
leaf type {
type identityref {
base control-plane-protocol;
}
description
"Type of the control-plane protocol -- an identity
derived from the 'control-plane-protocol'
base identity.";
}
leaf name {
type string;
description
"An arbitrary name of the control-plane protocol
instance.";
}
leaf description {
type string;
description
"Textual description of the control-plane protocol
instance.";
}
container static-routes {
when "derived-from-or-self(../type, 'rt:static')" {
description
"This container is only valid for the 'static' routing
protocol.";
}
description
"Support for the 'static' pseudo-protocol.
Address-family-specific modules augment this node with
their lists of routes.";
}
}
}
container ribs {
description
"Support for RIBs.";
list rib {
key "name";
description
"Each entry contains a configuration for a RIB identified
by the 'name' key.
Entries having the same key as a system-controlled entry
in the list '/routing/ribs/rib' are used for
configuring parameters of that entry. Other entries
define additional user-controlled RIBs.";
leaf name {
type string;
description
"The name of the RIB.
For system-controlled entries, the value of this leaf
must be the same as the name of the corresponding entry
in the operational state.
For user-controlled entries, an arbitrary name can be
used.";
}
uses address-family {
description
"The address family of the system-controlled RIB.";
}
leaf default-rib {
if-feature "multiple-ribs";
type boolean;
default "true";
config false;
description
"This flag has the value of 'true' if and only if the RIB
is the default RIB for the given address family.
By default, control-plane protocols place their routes
in the default RIBs.";
}
container routes {
config false;
description
"Current contents of the RIB.";
list route {
description
"A RIB route entry. This data node MUST be augmented
with information specific to routes of each address
family.";
leaf route-preference {
type route-preference;
description
"This route attribute, also known as 'administrative
distance', allows for selecting the preferred route
among routes with the same destination prefix. A
smaller value indicates a route that is
more preferred.";
}
container next-hop {
description
"Route's next-hop attribute.";
uses next-hop-state-content;
}
uses route-metadata;
}
}
action active-route {
description
"Return the active RIB route that is used for the
destination address.
Address-family-specific modules MUST augment input
parameters with a leaf named 'destination-address'.";
output {
container route {
description
"The active RIB route for the specified destination.
If no route exists in the RIB for the destination
address, no output is returned.
Address-family-specific modules MUST augment this
container with appropriate route contents.";
container next-hop {
description
"Route's next-hop attribute.";
uses next-hop-state-content;
}
uses route-metadata;
}
}
}
leaf description {
type string;
description
"Textual description of the RIB.";
}
}
}
}
/*
* The subsequent data nodes are obviated and obsoleted
* by the Network Management Datastore Architecture
* as described in RFC 8342.
*/
container routing-state {
config false;
status obsolete;
description
"State data of the routing subsystem.";
uses router-id {
status obsolete;
description
"Global router ID.
It may be either configured or assigned algorithmically by
the implementation.";
}
container interfaces {
status obsolete;
description
"Network-layer interfaces used for routing.";
leaf-list interface {
type if:interface-state-ref;
status obsolete;
description
"Each entry is a reference to the name of a configured
network-layer interface.";
}
}
container control-plane-protocols {
status obsolete;
description
"Container for the list of routing protocol instances.";
list control-plane-protocol {
key "type name";
status obsolete;
description
"State data of a control-plane protocol instance.
An implementation MUST provide exactly one
system-controlled instance of the 'direct'
pseudo-protocol. Instances of other control-plane
protocols MAY be created by configuration.";
leaf type {
type identityref {
base control-plane-protocol;
}
status obsolete;
description
"Type of the control-plane protocol.";
}
leaf name {
type string;
status obsolete;
description
"The name of the control-plane protocol instance.
For system-controlled instances, this name is
persistent, i.e., it SHOULD NOT change across
reboots.";
}
}
}
container ribs {
status obsolete;
description
"Container for RIBs.";
list rib {
key "name";
min-elements 1;
status obsolete;
description
"Each entry represents a RIB identified by the 'name'
key. All routes in a RIB MUST belong to the same address
family.
An implementation SHOULD provide one system-controlled
default RIB for each supported address family.";
leaf name {
type string;
status obsolete;
description
"The name of the RIB.";
}
uses address-family {
status obsolete;
description
"The address family of the RIB.";
}
leaf default-rib {
if-feature "multiple-ribs";
type boolean;
default "true";
status obsolete;
description
"This flag has the value of 'true' if and only if the
RIB is the default RIB for the given address family.
By default, control-plane protocols place their routes
in the default RIBs.";
}
container routes {
status obsolete;
description
"Current contents of the RIB.";
list route {
status obsolete;
description
"A RIB route entry. This data node MUST be augmented
with information specific to routes of each address
family.";
leaf route-preference {
type route-preference;
status obsolete;
description
"This route attribute, also known as 'administrative
distance', allows for selecting the preferred route
among routes with the same destination prefix. A
smaller value indicates a route that is
more preferred.";
}
container next-hop {
status obsolete;
description
"Route's next-hop attribute.";
uses next-hop-state-content {
status obsolete;
description
"Route's next-hop attribute operational state.";
}
}
uses route-metadata {
status obsolete;
description
"Route metadata.";
}
}
}
action active-route {
status obsolete;
description
"Return the active RIB route that is used for the
destination address.
Address-family-specific modules MUST augment input
parameters with a leaf named 'destination-address'.";
output {
container route {
status obsolete;
description
"The active RIB route for the specified
destination.
If no route exists in the RIB for the destination
address, no output is returned.
Address-family-specific modules MUST augment this
container with appropriate route contents.";
container next-hop {
status obsolete;
description
"Route's next-hop attribute.";
uses next-hop-state-content {
status obsolete;
description
"Active route state data.";
}
}
uses route-metadata {
status obsolete;
description
"Active route metadata.";
}
}
}
}
}
}
}
}
<CODE ENDS>
8. IPv4 Unicast Routing Management YANG Module
<CODE BEGINS> file "ietf-ipv4-unicast-routing@2018-03-13.yang"
module ietf-ipv4-unicast-routing {
yang-version "1.1";
namespace
"urn:ietf:params:xml:ns:yang:ietf-ipv4-unicast-routing";
prefix "v4ur";
import ietf-routing {
prefix "rt";
description
"An 'ietf-routing' module version that is compatible with
the Network Management Datastore Architecture (NMDA)
is required.";
}
import ietf-inet-types {
prefix "inet";
}
organization
"IETF NETMOD (Network Modeling) Working Group";
contact
"WG Web: <https://datatracker.ietf.org/wg/netmod/>
WG List: <mailto:rtgwg@ietf.org>
Editor: Ladislav Lhotka
<mailto:lhotka@nic.cz>
Acee Lindem
<mailto:acee@cisco.com>
Yingzhen Qu
<mailto:yingzhen.qu@huawei.com>";
description
"This YANG module augments the 'ietf-routing' module with basic
parameters for IPv4 unicast routing. The model fully conforms
to the Network Management Datastore Architecture (NMDA).
Copyright (c) 2018 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
(https://trustee.ietf.org/license-info).
This version of this YANG module is part of RFC 8349; see
the RFC itself for full legal notices.";
revision 2018-03-13 {
description
"Network Management Datastore Architecture (NMDA) revision.";
reference
"RFC 8349: A YANG Data Model for Routing Management
(NMDA Version)";
}
revision 2016-11-04 {
description
"Initial revision.";
reference
"RFC 8022: A YANG Data Model for Routing Management";
}
/* Identities */
identity ipv4-unicast {
base rt:ipv4;
description
"This identity represents the IPv4 unicast address family.";
}
augment "/rt:routing/rt:ribs/rt:rib/rt:routes/rt:route" {
when "derived-from-or-self(../../rt:address-family, "
+ "'v4ur:ipv4-unicast')" {
description
"This augment is valid only for IPv4 unicast.";
}
description
"This leaf augments an IPv4 unicast route.";
leaf destination-prefix {
type inet:ipv4-prefix;
description
"IPv4 destination prefix.";
}
}
augment "/rt:routing/rt:ribs/rt:rib/rt:routes/rt:route/"
+ "rt:next-hop/rt:next-hop-options/rt:simple-next-hop" {
when "derived-from-or-self(../../../rt:address-family, "
+ "'v4ur:ipv4-unicast')" {
description
"This augment is valid only for IPv4 unicast.";
}
description
"Augments the 'simple-next-hop' case in IPv4 unicast routes.";
leaf next-hop-address {
type inet:ipv4-address;
description
"IPv4 address of the next hop.";
}
}
augment "/rt:routing/rt:ribs/rt:rib/rt:routes/rt:route/"
+ "rt:next-hop/rt:next-hop-options/rt:next-hop-list/"
+ "rt:next-hop-list/rt:next-hop" {
when "derived-from-or-self(../../../../../rt:address-family, "
+ "'v4ur:ipv4-unicast')" {
description
"This augment is valid only for IPv4 unicast.";
}
description
"This leaf augments the 'next-hop-list' case of IPv4 unicast
routes.";
leaf address {
type inet:ipv4-address;
description
"IPv4 address of the next hop.";
}
}
augment
"/rt:routing/rt:ribs/rt:rib/rt:active-route/rt:input" {
when "derived-from-or-self(../rt:address-family, "
+ "'v4ur:ipv4-unicast')" {
description
"This augment is valid only for IPv4 unicast RIBs.";
}
description
"This augment adds the input parameter of the 'active-route'
action.";
leaf destination-address {
type inet:ipv4-address;
description
"IPv4 destination address.";
}
}
augment "/rt:routing/rt:ribs/rt:rib/rt:active-route/"
+ "rt:output/rt:route" {
when "derived-from-or-self(../../rt:address-family, "
+ "'v4ur:ipv4-unicast')" {
description
"This augment is valid only for IPv4 unicast.";
}
description
"This augment adds the destination prefix to the reply of the
'active-route' action.";
leaf destination-prefix {
type inet:ipv4-prefix;
description
"IPv4 destination prefix.";
}
}
augment "/rt:routing/rt:ribs/rt:rib/rt:active-route/"
+ "rt:output/rt:route/rt:next-hop/rt:next-hop-options/"
+ "rt:simple-next-hop" {
when "derived-from-or-self(../../../rt:address-family, "
+ "'v4ur:ipv4-unicast')" {
description
"This augment is valid only for IPv4 unicast.";
}
description
"Augments the 'simple-next-hop' case in the reply to the
'active-route' action.";
leaf next-hop-address {
type inet:ipv4-address;
description
"IPv4 address of the next hop.";
}
}
augment "/rt:routing/rt:ribs/rt:rib/rt:active-route/"
+ "rt:output/rt:route/rt:next-hop/rt:next-hop-options/"
+ "rt:next-hop-list/rt:next-hop-list/rt:next-hop" {
when "derived-from-or-self(../../../../../rt:address-family, "
+ "'v4ur:ipv4-unicast')" {
description
"This augment is valid only for IPv4 unicast.";
}
description
"Augments the 'next-hop-list' case in the reply to the
'active-route' action.";
leaf next-hop-address {
type inet:ipv4-address;
description
"IPv4 address of the next hop.";
}
}
augment "/rt:routing/rt:control-plane-protocols/"
+ "rt:control-plane-protocol/rt:static-routes" {
description
"This augment defines the 'static' pseudo-protocol
with data specific to IPv4 unicast.";
container ipv4 {
description
"Support for a 'static' pseudo-protocol instance
consists of a list of routes.";
list route {
key "destination-prefix";
description
"A list of static routes.";
leaf destination-prefix {
type inet:ipv4-prefix;
mandatory true;
description
"IPv4 destination prefix.";
}
leaf description {
type string;
description
"Textual description of the route.";
}
container next-hop {
description
"Support for next-hop.";
uses rt:next-hop-content {
augment "next-hop-options/simple-next-hop" {
description
"Augments the 'simple-next-hop' case in IPv4 static
routes.";
leaf next-hop-address {
type inet:ipv4-address;
description
"IPv4 address of the next hop.";
}
}
augment "next-hop-options/next-hop-list/next-hop-list/"
+ "next-hop" {
description
"Augments the 'next-hop-list' case in IPv4 static
routes.";
leaf next-hop-address {
type inet:ipv4-address;
description
"IPv4 address of the next hop.";
}
}
}
}
}
}
}
/*
* The subsequent data nodes are obviated and obsoleted
* by the Network Management Datastore Architecture
* as described in RFC 8342.
*/
augment "/rt:routing-state/rt:ribs/rt:rib/rt:routes/rt:route" {
when "derived-from-or-self(../../rt:address-family, "
+ "'v4ur:ipv4-unicast')" {
description
"This augment is valid only for IPv4 unicast.";
}
status obsolete;
description
"This leaf augments an IPv4 unicast route.";
leaf destination-prefix {
type inet:ipv4-prefix;
status obsolete;
description
"IPv4 destination prefix.";
}
}
augment "/rt:routing-state/rt:ribs/rt:rib/rt:routes/rt:route/"
+ "rt:next-hop/rt:next-hop-options/rt:simple-next-hop" {
when "derived-from-or-self(
../../../rt:address-family, 'v4ur:ipv4-unicast')" {
description
"This augment is valid only for IPv4 unicast.";
}
status obsolete;
description
"Augments the 'simple-next-hop' case in IPv4 unicast routes.";
leaf next-hop-address {
type inet:ipv4-address;
status obsolete;
description
"IPv4 address of the next hop.";
}
}
augment "/rt:routing-state/rt:ribs/rt:rib/rt:routes/rt:route/"
+ "rt:next-hop/rt:next-hop-options/rt:next-hop-list/"
+ "rt:next-hop-list/rt:next-hop" {
when "derived-from-or-self(../../../../../rt:address-family,
'v4ur:ipv4-unicast')" {
description
"This augment is valid only for IPv4 unicast.";
}
status obsolete;
description
"This leaf augments the 'next-hop-list' case of IPv4 unicast
routes.";
leaf address {
type inet:ipv4-address;
status obsolete;
description
"IPv4 address of the next hop.";
}
}
augment "/rt:routing-state/rt:ribs/rt:rib/rt:active-route/"
+ "rt:input" {
when "derived-from-or-self(../rt:address-family,
'v4ur:ipv4-unicast')" {
description
"This augment is valid only for IPv4 unicast RIBs.";
}
status obsolete;
description
"This augment adds the input parameter of the 'active-route'
action.";
leaf destination-address {
type inet:ipv4-address;
status obsolete;
description
"IPv4 destination address.";
}
}
augment "/rt:routing-state/rt:ribs/rt:rib/rt:active-route/"
+ "rt:output/rt:route" {
when "derived-from-or-self(../../rt:address-family,
'v4ur:ipv4-unicast')" {
description
"This augment is valid only for IPv4 unicast.";
}
status obsolete;
description
"This augment adds the destination prefix to the reply of the
'active-route' action.";
leaf destination-prefix {
type inet:ipv4-prefix;
status obsolete;
description
"IPv4 destination prefix.";
}
}
augment "/rt:routing-state/rt:ribs/rt:rib/rt:active-route/"
+ "rt:output/rt:route/rt:next-hop/rt:next-hop-options/"
+ "rt:simple-next-hop" {
when "derived-from-or-self(../../../rt:address-family,
'v4ur:ipv4-unicast')" {
description
"This augment is valid only for IPv4 unicast.";
}
status obsolete;
description
"Augments the 'simple-next-hop' case in the reply to the
'active-route' action.";
leaf next-hop-address {
type inet:ipv4-address;
status obsolete;
description
"IPv4 address of the next hop.";
}
}
augment "/rt:routing-state/rt:ribs/rt:rib/rt:active-route/"
+ "rt:output/rt:route/rt:next-hop/rt:next-hop-options/"
+ "rt:next-hop-list/rt:next-hop-list/rt:next-hop" {
when "derived-from-or-self(../../../../../rt:address-family,
'v4ur:ipv4-unicast')" {
description
"This augment is valid only for IPv4 unicast.";
}
status obsolete;
description
"Augments the 'next-hop-list' case in the reply to the
'active-route' action.";
leaf next-hop-address {
type inet:ipv4-address;
status obsolete;
description
"IPv4 address of the next hop.";
}
}
}
<CODE ENDS>
(page 37 continued on part 3)
