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";
}
organization
"IETF NETMOD (NETCONF Data Modeling Language) Working Group";
contact
"WG Web:
WG List:
WG Chair: Lou Berger
WG Chair: Kent Watsen
Editor: Ladislav Lhotka
Editor: Acee Lindem
";
description
"This YANG module defines essential components for the management
of a routing subsystem.
Copyright (c) 2016 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).
The key words 'MUST', 'MUST NOT', 'REQUIRED', 'SHALL', 'SHALL
NOT', 'SHOULD', 'SHOULD NOT', 'RECOMMENDED', 'MAY', and
'OPTIONAL' in the module text are to be interpreted as described
in RFC 2119 (https://tools.ietf.org/html/rfc2119).
This version of this YANG module is part of RFC XXXX
(https://tools.ietf.org/html/rfcXXXX); see the RFC itself for
full legal notices.";
revision 2016-11-03 {
description
"Initial revision.";
reference
"RFC XXXX: 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 make them also the default RIBs. These RIBs then appear as
entries of the list /routing-state/ribs/rib.";
}
feature router-id {
description
"This feature indicates that the server supports configuration
of 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 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 IPv4 address family.";
}
identity ipv6 {
base address-family;
description
"This identity represents 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 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
"Special next-hop options.";
}
}
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 of 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
"An user-specified identifier utilised 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 parameters of next-hops in state data.";
choice next-hop-options {
mandatory "true";
description
"Options for next-hops in state data.
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-state-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 of 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-state-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
"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
"Time stamp 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.";
}
}
/* State data */
container routing-state {
config "false";
description
"State data of the routing subsystem.";
uses router-id {
description
"Global router ID.
It may be either configured or assigned algorithmically by
the implementation.";
}
container interfaces {
description
"Network layer interfaces used for routing.";
leaf-list interface {
type if:interface-state-ref;
description
"Each entry is a reference to the name of a configured
network layer interface.";
}
}
container control-plane-protocols {
description
"Container for the list of routing protocol instances.";
list control-plane-protocol {
key "type name";
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;
}
description
"Type of the control plane protocol.";
}
leaf name {
type string;
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 {
description
"Container for RIBs.";
list rib {
key "name";
min-elements "1";
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;
description
"The name of the RIB.";
}
uses address-family;
leaf default-rib {
if-feature "multiple-ribs";
type boolean;
default "true";
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 {
description
"Current content of the RIB.";
list route {
description
"A RIB route entry. This data node MUST be augmented
with information specific for 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 means a more preferred route.";
}
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;
}
}
}
}
}
}
/* Configuration Data */
container routing {
description
"Configuration parameters for the routing subsystem.";
uses router-id {
if-feature "router-id";
description
"Configuration of the global router ID. Routing protocols
that use router ID can use this parameter or override it
with another value.";
}
container control-plane-protocols {
description
"Configuration of control plane protocol instances.";
list control-plane-protocol {
key "type name";
description
"Each entry contains configuration of 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
"Configuration of the 'static' pseudo-protocol.
Address-family-specific modules augment this node with
their lists of routes.";
}
}
}
container ribs {
description
"Configuration of RIBs.";
list rib {
key "name";
description
"Each entry contains configuration for a RIB identified by
the 'name' key.
Entries having the same key as a system-controlled entry
of the list /routing-state/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 state data.
For user-controlled entries, an arbitrary name can be
used.";
}
uses address-family {
description
"Address family of the RIB.
It is mandatory for user-controlled RIBs. For
system-controlled RIBs it can be omitted, otherwise it
must match the address family of the corresponding state
entry.";
refine "address-family" {
mandatory "false";
}
}
leaf description {
type string;
description
"Textual description of the RIB.";
}
}
}
}
}