A YANG Data Model for the Internet Group Management Protocol (IGMP) and Multicast Listener Discovery (MLD)Volta Networksxufeng.liu.ietf@gmail.comHuawei TechnologiesHuawei Bldg., No. 156 Beiqing Rd.Haidian DistrictBeijing100095Chinaguofeng@huawei.comJuniper Networks1133 Innovation WaySunnyvaleCaliforniaUnited States of Americasivakumar.mahesh@gmail.comMetaswitch Networks100 Church StreetEnfieldEN2 6BQUnited Kingdompete.mcallister@metaswitch.comIP Infusion IndiaRMZ Centennial, Block D 401Kundanahalli Main Road, Mahadevapura PostBangaloreIndiaanish.ietf@gmail.comPIM Working GroupYANG, IGMP, MLD, multicast, data model, ietf-igmp-mld, network management, routing
This document defines a YANG data model that can be used to
configure and manage Internet Group Management Protocol (IGMP) and
Multicast Listener Discovery (MLD) devices.Status of This Memo
This is an Internet Standards Track document.
This document is a product of the Internet Engineering Task Force
(IETF). It represents the consensus of the IETF community. It has
received public review and has been approved for publication by
the Internet Engineering Steering Group (IESG). Further
information on Internet Standards is available in Section 2 of
RFC 7841.
Information about the current status of this document, any
errata, and how to provide feedback on it may be obtained at
.
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
() 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.
Table of Contents
. Introduction
. Terminology
. Conventions Used in This Document
. Tree Diagrams
. Prefixes in Data Node Names
. Design of the Data Model
. Scope of Model
. Parameters Not Covered at the Global Level
. Parameters Not Covered at the Interface Level
. Optional Capabilities
. Position of Address Family in Hierarchy
. Module Structure
. IGMP Configuration and Operational State
. MLD Configuration and Operational State
. IGMP and MLD Actions
. IGMP and MLD YANG Module
. Security Considerations
. IANA Considerations
. References
. Normative References
. Informative References
Acknowledgments
Contributors
Authors' Addresses
Introduction
YANG is a data definition language that was
introduced to model the configuration and running state of a device
managed using network management protocols such as NETCONF
or RESTCONF . YANG is now also being used as a component of
wider management interfaces, such as command-line interfaces (CLIs).
This document defines a YANG data model that can be used to
configure and manage Internet Group Management Protocol (IGMP) and
Multicast Listener Discovery (MLD) devices. The protocol versions
include IGMPv1 , IGMPv2 , IGMPv3 , MLDv1
, and MLDv2 . The core features of the IGMP and
MLD protocols are defined as required. Non-core features are
defined as optional in the provided data model.
The YANG data model in this document conforms to the Network Management
Datastore Architecture (NMDA) .Terminology
The terminology for describing YANG data models is found in
and , including:
augment
data model
data node
identity
module
The following abbreviations are used in this document and the
defined model:
IGMP:
Internet Group Management Protocol .
MLD:
Multicast Listener Discovery .
SSM:
Source-Specific Multicast service model .
Conventions Used in This Document
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
when, and only when, they appear in all capitals, as shown here.
Tree Diagrams
Tree diagrams used in this document follow the notation defined in
.Prefixes in Data Node Names
In this document, names of data nodes, actions, and other data model
objects are often used without a prefix, as long as it is clear from
the context in which YANG module each name is defined. Otherwise,
names are prefixed using the standard prefix associated with the
corresponding YANG module, as shown in Table 1.
Prefixes and Corresponding YANG Modules
Prefix
YANG module
Reference
yang
ietf-yang-types
inet
ietf-inet-types
if
ietf-interfaces
ip
ietf-ip
rt
ietf-routing
rt-types
ietf-routing-types
acl
ietf-access-control-list
Design of the Data ModelScope of Model
The model covers IGMPv1 , IGMPv2 , IGMPv3
, MLDv1 , and MLDv2 .
This model does not cover other IGMP- and MLD-related protocols such
as IGMP/MLD Proxy or IGMP/MLD Snooping etc.,
which will be specified in separate documents.
This model can be used to configure and manage various versions of
IGMP and MLD protocols. The operational state data and statistics
can be retrieved by this model. Even though no protocol-specific
notifications are defined in this model, the subscription and push
mechanism defined in and
can be implemented by the user to subscribe to
notifications on the data nodes in this model.
The model contains all the basic configuration parameters to operate
the protocols listed above. Depending on the implementation choices,
some systems may not allow some of the advanced parameters to be
configurable. The occasionally implemented parameters are modeled as
optional features in this model, while the rarely implemented
parameters are not included in this model and left for augmentation.
This model can be extended, and it has been structured in a way that
such extensions can be conveniently made.
The protocol parameters covered in this model can been seen from the
model structure described in .
The protocol parameters that were considered but are not covered in
this model are described in the following sections.Parameters Not Covered at the Global Level
The configuration parameters and operational states not covered on
an IGMP instance or an MLD instance are:
Explicit tracking
Maximum transmit rate
Last member query count
Other querier present time
Send router alert
Startup query interval
Startup query count
Parameters Not Covered at the Interface Level
The configuration parameters and operational states not covered on
an IGMP interface or an MLD interface are:
Disable router alert check
Drop IGMP version 1, IGMP version 2, or MLD version 1
Last member query count
Maximum number of sources
Other querier present time
Passive mode
Promiscuous mode
Query before immediate leave
Send router alert
Optional Capabilities
This model is designed to represent the capabilities of IGMP and MLD
devices with various specifications, including the basic capability
subsets of the IGMP and MLD protocols. The main design goals of
this document are that the basic capabilities described in the model
are supported by any major now-existing implementation, and that the
configuration of all implementations meeting the specifications is
easy to express through some combination of the optional features in
the model and simple vendor augmentations.
There is also value in widely supported features being standardized,
to provide a standardized way to access these features, to save work
for individual vendors, and so that mapping between different
vendors' configuration is not needlessly complicated. Therefore, this
model declares a number of features representing capabilities that
not all deployed devices support.
The extensive use of feature declarations should also substantially
simplify the capability negotiation process for a vendor's IGMP and
MLD implementations.
On the other hand, operational state parameters are not so widely
designated as features, as there are many cases where the defaulting
of an operational state parameter would not cause any harm to the
system, and it is much more likely that an implementation without
native support for a piece of operational state would be able to
derive a suitable value for a state variable that is not natively
supported.Position of Address Family in Hierarchy
The protocol IGMP only supports IPv4, while the protocol MLD only
supports IPv6. The data model defined in this document can be used
for both IPv4 and IPv6 address families.
This document defines IGMP and MLD as separate schema branches in
the structure. The benefits are:
The model can support IGMP (IPv4), MLD (IPv6), or both
optionally and independently. Such flexibility cannot be
achieved cleanly with a combined branch.
The structure is consistent with other YANG data models such as RFC
8344, which uses separate branches for IPv4 and IPv6.
The separate branches for IGMP and MLD can accommodate their
differences better and cleaner. The two branches can better
support different features and node types.
Module Structure
This model augments the core routing data model specified in
.
+--rw routing
+--rw router-id?
+--rw control-plane-protocols
| +--rw control-plane-protocol* [type name]
| +--rw type
| +--rw name
| +--rw igmp <= Augmented by this Model
...
| +--rw mld <= Augmented by this Model
...
The "igmp" container instantiates an IGMP protocol of version
IGMPv1, IGMPv2, or IGMPv3. The "mld" container instantiates an MLD
protocol of version MLDv1 or MLDv2.
The YANG data model defined in this document conforms to the Network
Management Datastore Architecture (NMDA) . The operational
state data is combined with the associated configuration data in the
same hierarchy .
A configuration data node is marked as mandatory only when its value
must be provided by the user. Where nodes are not essential to
protocol operation, they are marked as optional. Some other nodes
are essential but have a default specified, so that they are also
optional and need not be configured explicitly.IGMP Configuration and Operational State
The IGMP data is modeled as a schema subtree augmenting the
"control-plane-protocol" data node under
"/rt:routing/rt:control-plane-protocols" in the module
ietf-routing, following the convention described in . The augmentation to the module
ietf-routing allows this model to support multiple instances
of IGMP, but a restriction MAY be added depending on the
implementation and the device. The identity "igmp" is
derived from the "rt:control-plane-protocol" base identity
and indicates that a control-plane-protocol instance is
IGMP.
The IGMP subtree is a three-level hierarchy structure as listed
below:
Global level:
Including IGMP configuration and operational state attributes for the entire IGMP protocol instance in this router.
Interface-global level:
Including configuration data nodes that
are applicable to all the interfaces whose corresponding nodes are
not defined or not configured at the interface level. For such a
node at the interface level, the system uses the same value of the
corresponding node at the interface-global level.
Interface level:
Including IGMP configuration and operational
state attributes specific to the given interface. For a
configuration node at the interface level, there may exist a
corresponding configuration node with the same name at the
interface-global level. The value configured on a node at the
interface level overrides the value configured on the corresponding
node at the interface-global level.
augment /rt:routing/rt:control-plane-protocols
/rt:control-plane-protocol:
+--rw igmp {feature-igmp}?
+--rw global
| +--rw enabled? boolean {global-admin-enable}?
| +--rw max-entries? uint32 {global-max-entries}?
| +--rw max-groups? uint32 {global-max-groups}?
| +--ro entries-count? uint32
| +--ro groups-count? uint32
| +--ro statistics
| +--ro discontinuity-time? yang:date-and-time
| +--ro error
| | +--ro total? yang:counter64
| | +--ro query? yang:counter64
| | +--ro report? yang:counter64
| | +--ro leave? yang:counter64
| | +--ro checksum? yang:counter64
| | +--ro too-short? yang:counter64
| +--ro received
| | +--ro total? yang:counter64
| | +--ro query? yang:counter64
| | +--ro report? yang:counter64
| | +--ro leave? yang:counter64
| +--ro sent
| +--ro total? yang:counter64
| +--ro query? yang:counter64
| +--ro report? yang:counter64
| +--ro leave? yang:counter64
+--rw interfaces
+--rw last-member-query-interval? uint16
+--rw query-interval? uint16
+--rw query-max-response-time? uint16
+--rw require-router-alert? boolean
| {intf-require-router-alert}?
+--rw robustness-variable? uint8
+--rw version? uint8
+--rw max-groups-per-interface? uint32
| {intf-max-groups}?
+--rw interface* [interface-name]
+--rw interface-name if:interface-ref
+--rw last-member-query-interval? uint16
+--rw query-interval? uint16
+--rw query-max-response-time? uint16
+--rw require-router-alert? boolean
| {intf-require-router-alert}?
+--rw robustness-variable? uint8
+--rw version? uint8
+--rw enabled? boolean
| {intf-admin-enable}?
+--rw group-policy?
| -> /acl:acls/acl/name
+--rw immediate-leave? empty
| {intf-immediate-leave}?
+--rw max-groups? uint32
| {intf-max-groups}?
+--rw max-group-sources? uint32
| {intf-max-group-sources}?
+--rw source-policy?
| -> /acl:acls/acl/name {intf-source-policy}?
+--rw verify-source-subnet? empty
| {intf-verify-source-subnet}?
+--rw explicit-tracking? empty
| {intf-explicit-tracking}?
+--rw lite-exclude-filter? empty
| {intf-lite-exclude-filter}?
+--rw join-group*
| rt-types:ipv4-multicast-group-address
| {intf-join-group}?
+--rw ssm-map*
| [ssm-map-source-addr ssm-map-group-policy]
| {intf-ssm-map}?
| +--rw ssm-map-source-addr ssm-map-ipv4-addr-type
| +--rw ssm-map-group-policy string
+--rw static-group* [group-addr source-addr]
| {intf-static-group}?
| +--rw group-addr
| | rt-types:ipv4-multicast-group-address
| +--rw source-addr
| rt-types:ipv4-multicast-source-address
+--ro oper-status enumeration
+--ro querier inet:ipv4-address
+--ro joined-group*
| rt-types:ipv4-multicast-group-address
| {intf-join-group}?
+--ro group* [group-address]
+--ro group-address
| rt-types:ipv4-multicast-group-address
+--ro expire uint32
+--ro filter-mode enumeration
+--ro up-time uint32
+--ro last-reporter? inet:ipv4-address
+--ro source* [source-address]
+--ro source-address inet:ipv4-address
+--ro expire uint32
+--ro up-time uint32
+--ro host-count? uint32
| {intf-explicit-tracking}?
+--ro last-reporter? inet:ipv4-address
+--ro host* [host-address]
{intf-explicit-tracking}?
+--ro host-address inet:ipv4-address
+--ro host-filter-mode enumeration
MLD Configuration and Operational State
The MLD data is modeled as a schema subtree augmenting the "control-plane-protocol" data node under "/rt:routing/rt:control-plane-protocols" in the module ietf-routing, following the convention
described in . The augmentation to the module ietf-routing
allows this model to support multiple instances of MLD, but a
restriction MAY be added depending on the implementation and the
device. The identity "mld" is derived from the "rt:control-plane-protocol" base identity and indicates that a control-plane-protocol
instance is MLD.
The MLD subtree is a three-level hierarchy structure as listed
below:
Global level:
Including MLD configuration and operational state
attributes for the entire MLD protocol instance in this router.
Interface-global level:
Including configuration data nodes that
are applicable to all the interfaces whose corresponding nodes are
not defined or not configured at the interface level. For such a
node at the interface level, the system uses the same value of the
corresponding node at the interface-global level.
Interface level:
Including MLD configuration and operational
state attributes specific to the given interface. For a
configuration node at the interface level, there may exist a
corresponding configuration node with the same name at the
interface-global level. The value configured on a node at the
interface level overrides the value configured on the corresponding
node at the interface-global level.
augment /rt:routing/rt:control-plane-protocols
/rt:control-plane-protocol:
+--rw mld {feature-mld}?
+--rw global
| +--rw enabled? boolean {global-admin-enable}?
| +--rw max-entries? uint32 {global-max-entries}?
| +--rw max-groups? uint32 {global-max-groups}?
| +--ro entries-count? uint32
| +--ro groups-count? uint32
| +--ro statistics
| +--ro discontinuity-time? yang:date-and-time
| +--ro error
| | +--ro total? yang:counter64
| | +--ro query? yang:counter64
| | +--ro report? yang:counter64
| | +--ro leave? yang:counter64
| | +--ro checksum? yang:counter64
| | +--ro too-short? yang:counter64
| +--ro received
| | +--ro total? yang:counter64
| | +--ro query? yang:counter64
| | +--ro report? yang:counter64
| | +--ro leave? yang:counter64
| +--ro sent
| +--ro total? yang:counter64
| +--ro query? yang:counter64
| +--ro report? yang:counter64
| +--ro leave? yang:counter64
+--rw interfaces
+--rw last-member-query-interval? uint16
+--rw query-interval? uint16
+--rw query-max-response-time? uint16
+--rw require-router-alert? boolean
| {intf-require-router-alert}?
+--rw robustness-variable? uint8
+--rw version? uint8
+--rw max-groups-per-interface? uint32
| {intf-max-groups}?
+--rw interface* [interface-name]
+--rw interface-name if:interface-ref
+--rw last-member-query-interval? uint16
+--rw query-interval? uint16
+--rw query-max-response-time? uint16
+--rw require-router-alert? boolean
| {intf-require-router-alert}?
+--rw robustness-variable? uint8
+--rw version? uint8
+--rw enabled? boolean
| {intf-admin-enable}?
+--rw group-policy?
| -> /acl:acls/acl/name
+--rw immediate-leave? empty
| {intf-immediate-leave}?
+--rw max-groups? uint32
| {intf-max-groups}?
+--rw max-group-sources? uint32
| {intf-max-group-sources}?
+--rw source-policy?
| -> /acl:acls/acl/name {intf-source-policy}?
+--rw verify-source-subnet? empty
| {intf-verify-source-subnet}?
+--rw explicit-tracking? empty
| {intf-explicit-tracking}?
+--rw lite-exclude-filter? empty
| {intf-lite-exclude-filter}?
+--rw join-group*
| rt-types:ipv6-multicast-group-address
| {intf-join-group}?
+--rw ssm-map*
| [ssm-map-source-addr ssm-map-group-policy]
| {intf-ssm-map}?
| +--rw ssm-map-source-addr ssm-map-ipv6-addr-type
| +--rw ssm-map-group-policy string
+--rw static-group* [group-addr source-addr]
| {intf-static-group}?
| +--rw group-addr
| | rt-types:ipv6-multicast-group-address
| +--rw source-addr
| rt-types:ipv6-multicast-source-address
+--ro oper-status enumeration
+--ro querier inet:ipv6-address
+--ro joined-group*
| rt-types:ipv6-multicast-group-address
| {intf-join-group}?
+--ro group* [group-address]
+--ro group-address
| rt-types:ipv6-multicast-group-address
+--ro expire uint32
+--ro filter-mode enumeration
+--ro up-time uint32
+--ro last-reporter? inet:ipv6-address
+--ro source* [source-address]
+--ro source-address inet:ipv6-address
+--ro expire uint32
+--ro up-time uint32
+--ro host-count? uint32
| {intf-explicit-tracking}?
+--ro last-reporter? inet:ipv6-address
+--ro host* [host-address]
{intf-explicit-tracking}?
+--ro host-address inet:ipv6-address
+--ro host-filter-mode enumeration
IGMP and MLD Actions
IGMP and MLD each have one action that clears the group membership
cache entries for that protocol.
augment /rt:routing/rt:control-plane-protocols
/rt:control-plane-protocol:
+--rw igmp {feature-igmp}?
+---x clear-groups {action-clear-groups}?
+---w input
+---w (interface)
| +--:(name)
| | +---w interface-name? leafref
| +--:(all)
| +---w all-interfaces? empty
+---w group-address union
+---w source-address
rt-types:ipv4-multicast-source-address
augment /rt:routing/rt:control-plane-protocols
/rt:control-plane-protocol:
+--rw mld {feature-mld}?
+---x clear-groups {action-clear-groups}?
+---w input
+---w (interface)
| +--:(name)
| | +---w interface-name? leafref
| +--:(all)
| +---w all-interfaces? empty
+---w group-address? union
+---w source-address?
rt-types:ipv6-multicast-source-address
IGMP and MLD YANG ModuleThis module references , ,
, , ,
, , ,
, , ,
, and .
module ietf-igmp-mld {
yang-version 1.1;
namespace "urn:ietf:params:xml:ns:yang:ietf-igmp-mld";
prefix igmp-mld;
import ietf-inet-types {
prefix inet;
reference
"RFC 6991: Common YANG Data Types";
}
import ietf-yang-types {
prefix yang;
reference
"RFC 6991: Common YANG Data Types";
}
import ietf-routing-types {
prefix rt-types;
reference
"RFC 8294: Common YANG Data Types for the Routing Area";
}
import ietf-access-control-list {
prefix acl;
reference
"RFC 8519: YANG Data Model for Network Access Control Lists
(ACLs)";
}
import ietf-routing {
prefix rt;
reference
"RFC 8349: A YANG Data Model for Routing Management (NMDA
Version)";
}
import ietf-interfaces {
prefix if;
reference
"RFC 8343: A YANG Data Model for Interface Management";
}
import ietf-ip {
prefix ip;
reference
"RFC 8344: A YANG Data Model for IP Management";
}
organization
"IETF PIM Working Group";
contact
"WG Web: <http://datatracker.ietf.org/wg/pim/>
WG List: <mailto:pim@ietf.org>
Editor: Xufeng Liu
<mailto:xufeng.liu.ietf@gmail.com>
Editor: Feng Guo
<mailto:guofeng@huawei.com>
Editor: Mahesh Sivakumar
<mailto:sivakumar.mahesh@gmail.com>
Editor: Pete McAllister
<mailto:pete.mcallister@metaswitch.com>
Editor: Anish Peter
<mailto:anish.ietf@gmail.com>";
description
"The module defines the configuration and operational state for
the Internet Group Management Protocol (IGMP) and Multicast
Listener Discovery (MLD) protocols.
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 (RFC 2119) (RFC 8174) when, and only when,
they appear in all capitals, as shown here.
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 8652; see the
RFC itself for full legal notices.";
revision 2019-11-01 {
description
"Initial revision.";
reference
"RFC 8652: A YANG Data Model for the Internet Group Management
Protocol (IGMP) and Multicast Listener Discovery (MLD)";
}
/*
* Features
*/
feature feature-igmp {
description
"Support IGMP protocol for IPv4 group membership record.";
}
feature feature-mld {
description
"Support MLD protocol for IPv6 group membership record.";
}
feature global-admin-enable {
description
"Support global configuration to enable or disable protocol.";
}
feature global-max-entries {
description
"Support configuration of global max-entries.";
}
feature global-max-groups {
description
"Support configuration of global max-groups.";
}
feature interface-global-config {
description
"Support global configuration applied for all interfaces.";
}
feature intf-admin-enable {
description
"Support configuration of interface administrative enabling.";
}
feature intf-immediate-leave {
description
"Support configuration of interface immediate-leave.";
}
feature intf-join-group {
description
"Support configuration of interface join-group.";
}
feature intf-max-groups {
description
"Support configuration of interface max-groups.";
}
feature intf-max-group-sources {
description
"Support configuration of interface max-group-sources.";
}
feature intf-require-router-alert {
description
"Support configuration of interface require-router-alert.";
}
feature intf-source-policy {
description
"Support configuration of interface source policy.";
}
feature intf-ssm-map {
description
"Support configuration of interface ssm-map.";
}
feature intf-static-group {
description
"Support configuration of interface static-group.";
}
feature intf-verify-source-subnet {
description
"Support configuration of interface verify-source-subnet.";
}
feature intf-explicit-tracking {
description
"Support configuration of interface explicit-tracking hosts.";
}
feature intf-lite-exclude-filter {
description
"Support configuration of interface lite-exclude-filter.";
}
feature per-interface-config {
description
"Support per-interface configuration.";
}
feature action-clear-groups {
description
"Support actions to clear groups.";
}
/*
* Typedefs
*/
typedef ssm-map-ipv4-addr-type {
type union {
type enumeration {
enum policy {
description
"Source address is specified in SSM map policy.";
}
}
type inet:ipv4-address;
}
description
"Multicast source IP address type for SSM map.";
}
// source-ipv4-addr-type
typedef ssm-map-ipv6-addr-type {
type union {
type enumeration {
enum policy {
description
"Source address is specified in SSM map policy.";
}
}
type inet:ipv6-address;
}
description
"Multicast source IP address type for SSM map.";
}
// source-ipv6-addr-type
/*
* Identities
*/
identity igmp {
if-feature "feature-igmp";
base rt:control-plane-protocol;
description
"IGMP protocol.";
reference
"RFC 3376: Internet Group Management Protocol, Version 3";
}
identity mld {
if-feature "feature-mld";
base rt:control-plane-protocol;
description
"MLD protocol.";
reference
"RFC 3810: Multicast Listener Discovery Version 2 (MLDv2) for
IPv6";
}
/*
* Groupings
*/
grouping global-config-attributes {
description
"This grouping is used in either IGMP schema or MLD schema.
When used in IGMP schema, this grouping contains the global
configuration for IGMP;
when used in MLD schema, this grouping contains the global
configuration for MLD.";
leaf enabled {
if-feature "global-admin-enable";
type boolean;
default "true";
description
"When this grouping is used for IGMP, this leaf indicates
whether IGMP is enabled ('true') or disabled ('false')
in the routing instance.
When this grouping is used for MLD, this leaf indicates
whether MLD is enabled ('true') or disabled ('false')
in the routing instance.";
}
leaf max-entries {
if-feature "global-max-entries";
type uint32;
description
"When this grouping is used for IGMP, this leaf indicates
the maximum number of entries in the IGMP instance.
When this grouping is used for MLD, this leaf indicates
the maximum number of entries in the MLD instance.
If this leaf is not specified, the number of entries is not
limited.";
}
leaf max-groups {
if-feature "global-max-groups";
type uint32;
description
"When this grouping is used for IGMP, this leaf indicates
the maximum number of groups in the IGMP instance.
When this grouping is used for MLD, this leaf indicates
the maximum number of groups in the MLD instance.
If this leaf is not specified, the number of groups is not
limited.";
}
}
// global-config-attributes
grouping global-state-attributes {
description
"This grouping is used in either IGMP schema or MLD schema.
When used in IGMP schema, this grouping contains the global
IGMP state attributes;
when used in MLD schema, this grouping contains the global
MLD state attributes.";
leaf entries-count {
type uint32;
config false;
description
"When this grouping is used for IGMP, this leaf indicates
the number of entries in the IGMP instance.
When this grouping is used for MLD, this leaf indicates
the number of entries in the MLD instance.";
}
leaf groups-count {
type uint32;
config false;
description
"When this grouping is used for IGMP, this leaf indicates
the number of existing groups in the IGMP instance.
When this grouping is used for MLD, this leaf indicates
the number of existing groups in the MLD instance.";
}
container statistics {
config false;
description
"When this grouping is used for IGMP, this container contains
the statistics for the IGMP instance.
When this grouping is used for MLD, this leaf indicates
the statistics for the MLD instance.";
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.";
}
container error {
description
"Statistics of errors.";
uses global-statistics-error;
}
container received {
description
"Statistics of received messages.";
uses global-statistics-sent-received;
}
container sent {
description
"Statistics of sent messages.";
uses global-statistics-sent-received;
}
}
// statistics
}
// global-state-attributes
grouping global-statistics-error {
description
"A grouping defining statistics attributes for errors.";
uses global-statistics-sent-received;
leaf checksum {
type yang:counter64;
description
"The number of checksum errors.";
}
leaf too-short {
type yang:counter64;
description
"The number of messages that are too short.";
}
}
// global-statistics-error
grouping global-statistics-sent-received {
description
"A grouping defining statistics attributes.";
leaf total {
type yang:counter64;
description
"The number of total messages.";
}
leaf query {
type yang:counter64;
description
"The number of query messages.";
}
leaf report {
type yang:counter64;
description
"The number of report messages.";
}
leaf leave {
type yang:counter64;
description
"The number of leave messages.";
}
}
// global-statistics-sent-received
grouping interface-global-config-attributes {
description
"Configuration attributes applied to the interface-global level
whose per-interface attributes are not configured.";
leaf max-groups-per-interface {
if-feature "intf-max-groups";
type uint32;
description
"The maximum number of groups associated with each interface.
If this leaf is not specified, the number of groups is not
limited.";
}
}
// interface-global-config-attributes
grouping interface-common-config-attributes {
description
"Configuration attributes applied to both the interface-global
level and interface level.";
leaf last-member-query-interval {
type uint16 {
range "1..1023";
}
units "seconds";
description
"When used in IGMP schema, this leaf indicates the Last
Member Query Interval, which may be tuned to modify the
leave latency of the network;
when used in MLD schema, this leaf indicates the Last
Listener Query Interval, which may be tuned to modify the
leave latency of the network.
This leaf is not applicable for version 1 of the IGMP. For
version 2 and version 3 of the IGMP, and for all versions of
the MLD, the default value of this leaf is 1.
This leaf may be configured at the interface level or the
interface-global level, with precedence given to the value
at the interface level. If the leaf is not configured at
either level, the default value is used.";
reference
"Section 8.8 of RFC 2236: Internet Group Management Protocol,
Version 2.
Section 8.8 of RFC 3376: Internet Group Management Protocol,
Version 3.
Section 7.8 of RFC 2710: Multicast Listener Discovery (MLD)
for IPv6.
Section 9.8 of RFC 3810: Multicast Listener Discovery
Version 2 (MLDv2) for IPv6.";
}
leaf query-interval {
type uint16 {
range "1..31744";
}
units "seconds";
description
"The Query Interval is the interval between General Queries
sent by the Querier. In RFC 3376, the Querier's Query
Interval (QQI) is represented from the Querier's Query
Interval Code (QQIC) in query message as follows:
If QQIC < 128, QQI = QQIC.
If QQIC >= 128, QQIC represents a floating-point value as
follows:
0 1 2 3 4 5 6 7
+-+-+-+-+-+-+-+-+
|1| exp | mant |
+-+-+-+-+-+-+-+-+
QQI = (mant | 0x10) << (exp + 3).
The maximum value of QQI is 31744.
The default value is 125.
This leaf may be configured at the interface level or the
interface-global level, with precedence given to the value
at the interface level. If the leaf is not configured at
either level, the default value is used.";
reference
"Sections 4.1.7, 8.2, and 8.14.2 of RFC 3376: Internet Group
Management Protocol, Version 3";
}
leaf query-max-response-time {
type uint16 {
range "1..1023";
}
units "seconds";
description
"Query maximum response time specifies the maximum time
allowed before sending a responding report.
The default value is 10.
This leaf may be configured at the interface level or the
interface-global level, with precedence given to the value
at the interface level. If the leaf is not configured at
either level, the default value is used.";
reference
"Sections 4.1.1, 8.3, and 8.14.3 of RFC 3376: Internet Group
Management Protocol, Version 3";
}
leaf require-router-alert {
if-feature "intf-require-router-alert";
type boolean;
description
"Protocol packets should contain the router alert IP option.
When this leaf is not configured, the server uses the
following rules to determine the operational value of this
leaf:
if this grouping is used in IGMP schema and the value of the
leaf 'version' is 1, the value 'false' is operationally used
by the server;
if this grouping is used in IGMP schema and the value of the
leaf 'version' is 2 or 3, the value 'true' is operationally
used by the server;
if this grouping is used in MLD schema, the value 'true' is
operationally used by the server.
This leaf may be configured at the interface level or the
interface-global level, with precedence given to the value
at the interface level. If the leaf is not configured at
either level, the default value is used.";
}
leaf robustness-variable {
type uint8 {
range "1..7";
}
description
"The Querier's Robustness Variable allows tuning for the
expected packet loss on a network.
The default value is 2.
This leaf may be configured at the interface level or the
interface-global level, with precedence given to the value
at the interface level. If the leaf is not configured at
either level, the default value is used.";
reference
"Sections 4.1.6, 8.1, and 8.14.1 of RFC 3376: Internet Group
Management Protocol, Version 3";
}
}
// interface-common-config-attributes
grouping interface-common-config-attributes-igmp {
description
"Configuration attributes applied to both the interface-global
level and interface level for IGMP.";
uses interface-common-config-attributes;
leaf version {
type uint8 {
range "1..3";
}
description
"IGMP version.
The default value is 2.
This leaf may be configured at the interface level or the
interface-global level, with precedence given to the value
at the interface level. If the leaf is not configured at
either level, the default value is used.";
reference
"RFC 1112: Host Extensions for IP Multicasting,
RFC 2236: Internet Group Management Protocol, Version 2,
RFC 3376: Internet Group Management Protocol, Version 3.";
}
}
grouping interface-common-config-attributes-mld {
description
"Configuration attributes applied to both the interface-global
level and interface level for MLD.";
uses interface-common-config-attributes;
leaf version {
type uint8 {
range "1..2";
}
description
"MLD version.
The default value is 2.
This leaf may be configured at the interface level or the
interface-global level, with precedence given to the value
at the interface level. If the leaf is not configured at
either level, the default value is used.";
reference
"RFC 2710: Multicast Listener Discovery (MLD) for IPv6,
RFC 3810: Multicast Listener Discovery Version 2 (MLDv2)
for IPv6.";
}
}
grouping interfaces-config-attributes-igmp {
description
"Configuration attributes applied to the interface-global
level for IGMP.";
uses interface-common-config-attributes-igmp;
uses interface-global-config-attributes;
}
grouping interfaces-config-attributes-mld {
description
"Configuration attributes applied to the interface-global
level for MLD.";
uses interface-common-config-attributes-mld;
uses interface-global-config-attributes;
}
grouping interface-level-config-attributes {
description
"This grouping is used in either IGMP schema or MLD schema.
When used in IGMP schema, this grouping contains the IGMP
configuration attributes that are defined at the interface
level but are not defined at the interface-global level;
when used in MLD schema, this grouping contains the MLD
configuration attributes that are defined at the interface
level but are not defined at the interface-global level.";
leaf enabled {
if-feature "intf-admin-enable";
type boolean;
default "true";
description
"When this grouping is used for IGMP, this leaf indicates
whether IGMP is enabled ('true') or disabled ('false')
on the interface.
When this grouping is used for MLD, this leaf indicates
whether MLD is enabled ('true') or disabled ('false')
on the interface.";
}
leaf group-policy {
type leafref {
path "/acl:acls/acl:acl/acl:name";
}
description
"When this grouping is used for IGMP, this leaf specifies
the name of the access policy used to filter the
IGMP membership.
When this grouping is used for MLD, this leaf specifies
the name of the access policy used to filter the
MLD membership.
The value space of this leaf is restricted to the existing
policy instances defined by the referenced schema in
RFC 8519.
As specified by RFC 8519, the length of the name is between
1 and 64; a device MAY further restrict the length of this
name; space and special characters are not allowed.
If this leaf is not specified, no policy is applied, and
all packets received from this interface are accepted.";
reference
"RFC 8519: YANG Data Model for Network Access Control Lists
(ACLs)";
}
leaf immediate-leave {
if-feature "intf-immediate-leave";
type empty;
description
"When this grouping is used for IGMP, the presence of this
leaf requests IGMP to perform an immediate leave upon
receiving an IGMPv2 leave message.
If the router is IGMP-enabled, it sends an IGMP last member
query with a last member query response time. However, the
router does not wait for the response time before it prunes
the group.
When this grouping is used for MLD, the presence of this
leaf requests MLD to perform an immediate leave upon
receiving an MLDv1 leave message.
If the router is MLD-enabled, it sends an MLD last member
query with a last member query response time. However, the
router does not wait for the response time before it prunes
the group.";
}
leaf max-groups {
if-feature "intf-max-groups";
type uint32;
description
"When this grouping is used for IGMP, this leaf indicates
the maximum number of groups associated with the IGMP
interface.
When this grouping is used for MLD, this leaf indicates
the maximum number of groups associated with the MLD
interface.
If this leaf is not specified, the number of groups is not
limited.";
}
leaf max-group-sources {
if-feature "intf-max-group-sources";
type uint32;
description
"The maximum number of group sources.
If this leaf is not specified, the number of group sources
is not limited.";
}
leaf source-policy {
if-feature "intf-source-policy";
type leafref {
path "/acl:acls/acl:acl/acl:name";
}
description
"Name of the access policy used to filter sources.
The value space of this leaf is restricted to the existing
policy instances defined by the referenced schema in
RFC 8519.
As specified by RFC 8519, the length of the name is between
1 and 64; a device MAY further restrict the length of this
name; space and special characters are not allowed.
If this leaf is not specified, no policy is applied, and
all packets received from this interface are accepted.";
}
leaf verify-source-subnet {
if-feature "intf-verify-source-subnet";
type empty;
description
"If present, the interface accepts packets with matching
source IP subnet only.";
}
leaf explicit-tracking {
if-feature "intf-explicit-tracking";
type empty;
description
"When this grouping is used for IGMP, the presence of this
leaf enables an IGMP-based explicit membership tracking
function for multicast routers and IGMP proxy devices
supporting IGMPv3.
When this grouping is used for MLD, the presence of this
leaf enables an MLD-based explicit membership tracking
function for multicast routers and MLD proxy devices
supporting MLDv2.
The explicit membership tracking function contributes to
saving network resources and shortening leave latency.";
reference
"Section 3 of RFC 6636: Tuning the Behavior of the Internet
Group Management Protocol (IGMP) and Multicast Listener
Discovery (MLD) for Routers in Mobile and Wireless
Networks";
}
leaf lite-exclude-filter {
if-feature "intf-lite-exclude-filter";
type empty;
description
"When this grouping is used for IGMP, the presence of this
leaf enables the support of the simplified EXCLUDE filter
in the Lightweight IGMPv3 protocol, which simplifies the
standard versions of IGMPv3.
When this grouping is used for MLD, the presence of this
leaf enables the support of the simplified EXCLUDE filter
in the Lightweight MLDv2 protocol, which simplifies the
standard versions of MLDv2.";
reference
"RFC 5790: Lightweight Internet Group Management Protocol
Version 3 (IGMPv3) and Multicast Listener Discovery
Version 2 (MLDv2) Protocols";
}
}
// interface-level-config-attributes
grouping interface-config-attributes-igmp {
description
"Per-interface configuration attributes for IGMP.";
uses interface-common-config-attributes-igmp;
uses interface-level-config-attributes;
leaf-list join-group {
if-feature "intf-join-group";
type rt-types:ipv4-multicast-group-address;
description
"The router joins this multicast group on the interface.";
}
list ssm-map {
if-feature "intf-ssm-map";
key "ssm-map-source-addr ssm-map-group-policy";
description
"The policy for (*,G) mapping to (S,G).";
leaf ssm-map-source-addr {
type ssm-map-ipv4-addr-type;
description
"Multicast source IPv4 address.";
}
leaf ssm-map-group-policy {
type string;
description
"Name of the policy used to define ssm-map rules.
A device can restrict the length
and value of this name, possibly space and special
characters are not allowed.";
}
}
list static-group {
if-feature "intf-static-group";
key "group-addr source-addr";
description
"A static multicast route, (*,G) or (S,G).
The version of IGMP must be 3 to support (S,G).";
leaf group-addr {
type rt-types:ipv4-multicast-group-address;
description
"Multicast group IPv4 address.";
}
leaf source-addr {
type rt-types:ipv4-multicast-source-address;
description
"Multicast source IPv4 address.";
}
}
}
// interface-config-attributes-igmp
grouping interface-config-attributes-mld {
description
"Per-interface configuration attributes for MLD.";
uses interface-common-config-attributes-mld;
uses interface-level-config-attributes;
leaf-list join-group {
if-feature "intf-join-group";
type rt-types:ipv6-multicast-group-address;
description
"The router joins this multicast group on the interface.";
}
list ssm-map {
if-feature "intf-ssm-map";
key "ssm-map-source-addr ssm-map-group-policy";
description
"The policy for (*,G) mapping to (S,G).";
leaf ssm-map-source-addr {
type ssm-map-ipv6-addr-type;
description
"Multicast source IPv6 address.";
}
leaf ssm-map-group-policy {
type string;
description
"Name of the policy used to define ssm-map rules.
A device can restrict the length
and value of this name, possibly space and special
characters are not allowed.";
}
}
list static-group {
if-feature "intf-static-group";
key "group-addr source-addr";
description
"A static multicast route, (*,G) or (S,G).
The version of MLD must be 2 to support (S,G).";
leaf group-addr {
type rt-types:ipv6-multicast-group-address;
description
"Multicast group IPv6 address.";
}
leaf source-addr {
type rt-types:ipv6-multicast-source-address;
description
"Multicast source IPv6 address.";
}
}
}
// interface-config-attributes-mld
grouping interface-state-attributes {
description
"Per-interface state attributes for both IGMP and MLD.";
leaf oper-status {
type enumeration {
enum up {
description
"Ready to pass packets.";
}
enum down {
description
"The interface does not pass any packets.";
}
}
config false;
mandatory true;
description
"Indicates whether the operational state of the interface
is up or down.";
}
}
// interface-state-attributes
grouping interface-state-attributes-igmp {
description
"Per-interface state attributes for IGMP.";
uses interface-state-attributes;
leaf querier {
type inet:ipv4-address;
config false;
mandatory true;
description
"The querier address in the subnet.";
}
leaf-list joined-group {
if-feature "intf-join-group";
type rt-types:ipv4-multicast-group-address;
config false;
description
"The routers that joined this multicast group.";
}
list group {
key "group-address";
config false;
description
"Multicast group membership information
that joined on the interface.";
leaf group-address {
type rt-types:ipv4-multicast-group-address;
description
"Multicast group address.";
}
uses interface-state-group-attributes;
leaf last-reporter {
type inet:ipv4-address;
description
"The IPv4 address of the last host that has sent the
report to join the multicast group.";
}
list source {
key "source-address";
description
"List of multicast source information
of the multicast group.";
leaf source-address {
type inet:ipv4-address;
description
"Multicast source address in group record.";
}
uses interface-state-source-attributes;
leaf last-reporter {
type inet:ipv4-address;
description
"The IPv4 address of the last host that has sent the
report to join the multicast source and group.";
}
list host {
if-feature "intf-explicit-tracking";
key "host-address";
description
"List of hosts with the membership for the specific
multicast source-group.";
leaf host-address {
type inet:ipv4-address;
description
"The IPv4 address of the host.";
}
uses interface-state-host-attributes;
}
// list host
}
// list source
}
// list group
}
// interface-state-attributes-igmp
grouping interface-state-attributes-mld {
description
"Per-interface state attributes for MLD.";
uses interface-state-attributes;
leaf querier {
type inet:ipv6-address;
config false;
mandatory true;
description
"The querier address in the subnet.";
}
leaf-list joined-group {
if-feature "intf-join-group";
type rt-types:ipv6-multicast-group-address;
config false;
description
"The routers that joined this multicast group.";
}
list group {
key "group-address";
config false;
description
"Multicast group membership information
that joined on the interface.";
leaf group-address {
type rt-types:ipv6-multicast-group-address;
description
"Multicast group address.";
}
uses interface-state-group-attributes;
leaf last-reporter {
type inet:ipv6-address;
description
"The IPv6 address of the last host that has sent the
report to join the multicast group.";
}
list source {
key "source-address";
description
"List of multicast sources of the multicast group.";
leaf source-address {
type inet:ipv6-address;
description
"Multicast source address in group record.";
}
uses interface-state-source-attributes;
leaf last-reporter {
type inet:ipv6-address;
description
"The IPv6 address of the last host that has sent the
report to join the multicast source and group.";
}
list host {
if-feature "intf-explicit-tracking";
key "host-address";
description
"List of hosts with the membership for the specific
multicast source-group.";
leaf host-address {
type inet:ipv6-address;
description
"The IPv6 address of the host.";
}
uses interface-state-host-attributes;
}
// list host
}
// list source
}
// list group
}
// interface-state-attributes-mld
grouping interface-state-group-attributes {
description
"Per-interface state attributes for both IGMP and MLD
groups.";
leaf expire {
type uint32;
units "seconds";
mandatory true;
description
"The time left before the multicast group state expires.";
}
leaf filter-mode {
type enumeration {
enum include {
description
"In include mode, reception of packets sent
to the specified multicast address is requested
only from those IP source addresses listed in the
source-list parameter";
}
enum exclude {
description
"In exclude mode, reception of packets sent
to the given multicast address is requested
from all IP source addresses except those
listed in the source-list parameter.";
}
}
mandatory true;
description
"Filter mode for a multicast group,
may be either include or exclude.";
}
leaf up-time {
type uint32;
units "seconds";
mandatory true;
description
"The elapsed time since the device created multicast group
record.";
}
}
// interface-state-group-attributes
grouping interface-state-source-attributes {
description
"Per-interface state attributes for both IGMP and MLD
source-group records.";
leaf expire {
type uint32;
units "seconds";
mandatory true;
description
"The time left before multicast source-group state expires.";
}
leaf up-time {
type uint32;
units "seconds";
mandatory true;
description
"The elapsed time since the device created multicast
source-group record.";
}
leaf host-count {
if-feature "intf-explicit-tracking";
type uint32;
description
"The number of host addresses.";
}
}
// interface-state-source-attributes
grouping interface-state-host-attributes {
description
"Per-interface state attributes for both IGMP and MLD
hosts of source-group records.";
leaf host-filter-mode {
type enumeration {
enum include {
description
"In include mode.";
}
enum exclude {
description
"In exclude mode.";
}
}
mandatory true;
description
"Filter mode for a multicast membership
host may be either include or exclude.";
}
}
// interface-state-host-attributes
/*
* Configuration and Operational state data nodes (NMDA version)
*/
augment "/rt:routing/rt:control-plane-protocols/"
+ "rt:control-plane-protocol" {
when "derived-from-or-self(rt:type, 'igmp-mld:igmp')" {
description
"This augmentation is only valid for a control-plane
protocol instance of IGMP (type 'igmp').";
}
description
"IGMP augmentation to routing control-plane protocol
configuration and state.";
container igmp {
if-feature "feature-igmp";
description
"IGMP configuration and operational state data.";
container global {
description
"Global attributes.";
uses global-config-attributes;
uses global-state-attributes;
}
container interfaces {
description
"Containing a list of interfaces.";
uses interfaces-config-attributes-igmp {
if-feature "interface-global-config";
refine "query-interval" {
default "125";
}
refine "query-max-response-time" {
default "10";
}
refine "robustness-variable" {
default "2";
}
refine "version" {
default "2";
}
}
list interface {
key "interface-name";
description
"List of IGMP interfaces.";
leaf interface-name {
type if:interface-ref;
must
'/if:interfaces/if:interface[if:name = current()]/'
+ 'ip:ipv4' {
error-message
"The interface must have IPv4 configured, either "
+ "enabled or disabled.";
}
description
"Reference to an entry in the global interface list.";
}
uses interface-config-attributes-igmp {
if-feature "per-interface-config";
refine "last-member-query-interval" {
must '../version != 1 or '
+ '(not(../version) and '
+ '(../../version != 1 or not(../../version)))' {
error-message "IGMPv1 does not support "
+ "last-member-query-interval.";
}
}
refine "max-group-sources" {
must '../version = 3 or '
+ '(not(../version) and (../../version = 3))' {
error-message
"The version of IGMP must be 3 to support the "
+ "source-specific parameters.";
}
}
refine "source-policy" {
must '../version = 3 or '
+ '(not(../version) and (../../version = 3))' {
error-message
"The version of IGMP must be 3 to support the "
+ "source-specific parameters.";
}
}
refine "explicit-tracking" {
must '../version = 3 or '
+ '(not(../version) and (../../version = 3))' {
error-message
"The version of IGMP must be 3 to support the "
+ "explicit tracking function.";
}
}
refine "lite-exclude-filter" {
must '../version = 3 or '
+ '(not(../version) and (../../version = 3))' {
error-message
"The version of IGMP must be 3 to support the "
+ "simplified EXCLUDE filter in the Lightweight "
+ "IGMPv3 protocol.";
}
}
}
uses interface-state-attributes-igmp;
}
// interface
}
// interfaces
/*
* Actions
*/
action clear-groups {
if-feature "action-clear-groups";
description
"Clears the specified IGMP cache entries.";
input {
choice interface {
mandatory true;
description
"Indicates the interface(s) from which the cache
entries are cleared.";
case name {
leaf interface-name {
type leafref {
path "/rt:routing/rt:control-plane-protocols/"
+ "rt:control-plane-protocol/"
+ "igmp-mld:igmp/igmp-mld:interfaces/"
+ "igmp-mld:interface/igmp-mld:interface-name";
}
description
"Name of the IGMP interface.";
}
}
case all {
leaf all-interfaces {
type empty;
description
"IGMP groups from all interfaces are cleared.";
}
}
}
leaf group-address {
type union {
type enumeration {
enum * {
description
"Any group address.";
}
}
type rt-types:ipv4-multicast-group-address;
}
mandatory true;
description
"Multicast group IPv4 address.
If the value '*' is specified, all IGMP group entries
are cleared.";
}
leaf source-address {
type rt-types:ipv4-multicast-source-address;
mandatory true;
description
"Multicast source IPv4 address.
If the value '*' is specified, all IGMP source-group
entries are cleared.";
}
}
}
// action clear-groups
}
// igmp
}
// augment
augment "/rt:routing/rt:control-plane-protocols/"
+ "rt:control-plane-protocol" {
when "derived-from-or-self(rt:type, 'igmp-mld:mld')" {
description
"This augmentation is only valid for a control-plane
protocol instance of IGMP (type 'mld').";
}
description
"MLD augmentation to routing control-plane protocol
configuration and state.";
container mld {
if-feature "feature-mld";
description
"MLD configuration and operational state data.";
container global {
description
"Global attributes.";
uses global-config-attributes;
uses global-state-attributes;
}
container interfaces {
description
"Containing a list of interfaces.";
uses interfaces-config-attributes-mld {
if-feature "interface-global-config";
refine "last-member-query-interval" {
default "1";
}
refine "query-interval" {
default "125";
}
refine "query-max-response-time" {
default "10";
}
refine "require-router-alert" {
default "true";
}
refine "robustness-variable" {
default "2";
}
refine "version" {
default "2";
}
}
list interface {
key "interface-name";
description
"List of MLD interfaces.";
leaf interface-name {
type if:interface-ref;
must
'/if:interfaces/if:interface[if:name = current()]/'
+ 'ip:ipv6' {
error-message
"The interface must have IPv6 configured, either "
+ "enabled or disabled.";
}
description
"Reference to an entry in the global interface list.";
}
uses interface-config-attributes-mld {
if-feature "per-interface-config";
refine "max-group-sources" {
must '../version = 2 or '
+ '(not(../version) and '
+ '(../../version = 2 or not(../../version)))' {
error-message
"The version of MLD must be 2 to support the "
+ "source-specific parameters.";
}
}
refine "source-policy" {
must '../version = 2 or '
+ '(not(../version) and '
+ '(../../version = 2 or not(../../version)))' {
error-message
"The version of MLD must be 2 to support the "
+ "source-specific parameters.";
}
}
refine "explicit-tracking" {
must '../version = 2 or '
+ '(not(../version) and '
+ '(../../version = 2 or not(../../version)))' {
error-message
"The version of MLD must be 2 to support the "
+ "explicit tracking function.";
}
}
refine "lite-exclude-filter" {
must '../version = 2 or '
+ '(not(../version) and '
+ '(../../version = 2 or not(../../version)))' {
error-message
"The version of MLD must be 2 to support the "
+ "simplified EXCLUDE filter in the Lightweight "
+ "MLDv2 protocol.";
}
}
}
uses interface-state-attributes-mld;
}
// interface
}
// interfaces
/*
* Actions
*/
action clear-groups {
if-feature "action-clear-groups";
description
"Clears the specified MLD cache entries.";
input {
choice interface {
mandatory true;
description
"Indicates the interface(s) from which the cache
entries are cleared.";
case name {
leaf interface-name {
type leafref {
path "/rt:routing/rt:control-plane-protocols/"
+ "rt:control-plane-protocol/"
+ "igmp-mld:mld/igmp-mld:interfaces/"
+ "igmp-mld:interface/igmp-mld:interface-name";
}
description
"Name of the MLD interface.";
}
}
case all {
leaf all-interfaces {
type empty;
description
"MLD groups from all interfaces are cleared.";
}
}
}
leaf group-address {
type union {
type enumeration {
enum * {
description
"Any group address.";
}
}
type rt-types:ipv6-multicast-group-address;
}
description
"Multicast group IPv6 address.
If the value '*' is specified, all MLD group entries
are cleared.";
}
leaf source-address {
type rt-types:ipv6-multicast-source-address;
description
"Multicast source IPv6 address.
If the value '*' is specified, all MLD source-group
entries are cleared.";
}
}
}
// action clear-mld-groups
}
// mld
}
// augment
}
Security Considerations
The YANG module specified in this document defines a schema for data
that is designed to be accessed via network management protocols
such as NETCONF or RESTCONF . The lowest NETCONF
layer is the secure transport layer, and the mandatory-to-implement
secure transport is Secure Shell (SSH) . The lowest
RESTCONF layer is HTTPS, and the mandatory-to-implement secure
transport is TLS .
The Network Configuration Access Control Model (NACM)
provides the means to restrict access for particular NETCONF or
RESTCONF users to a preconfigured subset of all available NETCONF or
RESTCONF protocol operations and content.
There are a number of data nodes defined in this YANG module that
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. These are the subtrees and data nodes
and their sensitivity/vulnerability:
Under /rt:routing/rt:control-plane-protocols
/rt:control-plane-protocol/igmp-mld:igmp,
igmp-mld:global
This subtree specifies the configuration for the IGMP attributes
at the global level on an IGMP instance. Modifying the
configuration can cause IGMP membership to be deleted or
reconstructed on all the interfaces of an IGMP instance.
igmp-mld:interfaces
This subtree specifies the configuration for the IGMP attributes
at the interface-global level on an IGMP instance. Modifying the
configuration can cause IGMP membership to be deleted or
reconstructed on all the interfaces of an IGMP instance.
igmp-mld:interfaces/interface
This subtree specifies the configuration for the IGMP attributes
at the interface level on an IGMP instance. Modifying the
configuration can cause IGMP membership to be deleted or
reconstructed on a specific interface of an IGMP instance.
Under /rt:routing/rt:control-plane-protocols
/rt:control-plane-protocol/igmp-mld:mld,
igmp-mld:global
This subtree specifies the configuration for the MLD attributes at
the global level on an MLD instance. Modifying the configuration
can cause MLD membership to be deleted or reconstructed on all the
interfaces of an MLD instance.
igmp-mld:interfaces
This subtree specifies the configuration for the MLD attributes at
the interface-global level on an MLD instance. Modifying the
configuration can cause MLD membership to be deleted or
reconstructed on all the interfaces of an MLD instance.
igmp-mld:interfaces/interface
This subtree specifies the configuration for the MLD attributes at
the interface level on a device. Modifying the configuration can
cause MLD membership to be deleted or reconstructed on a specific
interface of an MLD instance.
Unauthorized access to any data node of these subtrees can adversely
affect the membership records of multicast routing subsystem on the
local device. This may lead to network malfunctions, delivery of
packets to inappropriate destinations, and other problems.
Some of the readable data nodes in this YANG module may be
considered sensitive or vulnerable in some network environments. It
is thus important to control read access (e.g., via get, get-config,
or notification) to these data nodes. These are the subtrees and
data nodes and their sensitivity/vulnerability:
/rt:routing/rt:control-plane-protocols
/rt:control-plane-protocol/igmmp-mld:igmp
/rt:routing/rt:control-plane-protocols
/rt:control-plane-protocol/igmp-mld:mld
Unauthorized access to any data node of the above subtree can
disclose the operational state information of IGMP or MLD on this
device.
Some of the action operations in this YANG module may be considered
sensitive or vulnerable in some network environments. It is thus
important to control access to these operations. These are the
operations and their sensitivity/vulnerability:
/rt:routing/rt:control-plane-protocols
/rt:control-plane-protocol/igmmp-mld:igmp/igmmp-mld:clear-groups
/rt:routing/rt:control-plane-protocols
/rt:control-plane-protocol/igmp-mld:mld/igmp-mld:clear-groups
Unauthorized access to any of the above action operations can delete
the IGMP or MLD membership records on this device.IANA Considerations
This document registers the following namespace URIs in the IETF XML
registry :
URI:
urn:ietf:params:xml:ns:yang:ietf-igmp-mld
Registrant Contact:
The IESG.
XML:
N/A; the requested URI is an XML namespace.
This document registers the following YANG modules in the YANG Module
Names registry :
Name:
ietf-igmp-mld
Namespace:
urn:ietf:params:xml:ns:yang:ietf-igmp-mld
Prefix:
igmp-mld
Reference:
RFC 8652
ReferencesNormative ReferencesHost extensions for IP multicastingThis memo specifies the extensions required of a host implementation of the Internet Protocol (IP) to support multicasting. Recommended procedure for IP multicasting in the Internet. This RFC obsoletes RFCs 998 and 1054. [STANDARDS-TRACK]Key words for use in RFCs to Indicate Requirement LevelsIn many standards track documents several words are used to signify the requirements in the specification. These words are often capitalized. This document defines these words as they should be interpreted in IETF documents. This document specifies an Internet Best Current Practices for the Internet Community, and requests discussion and suggestions for improvements.Internet Group Management Protocol, Version 2This memo documents IGMPv2, used by IP hosts to report their multicast group memberships to routers. It updates STD 5, RFC 1112. [STANDARDS-TRACK]Multicast Listener Discovery (MLD) for IPv6This document specifies the protocol used by an IPv6 router to discover the presence of multicast listeners (that is, nodes wishing to receive multicast packets) on its directly attached links, and to discover specifically which multicast addresses are of interest to those neighboring nodes. [STANDARDS-TRACK]Internet Group Management Protocol, Version 3The IETF XML RegistryThis document describes an IANA maintained registry for IETF standards which use Extensible Markup Language (XML) related items such as Namespaces, Document Type Declarations (DTDs), Schemas, and Resource Description Framework (RDF) Schemas.Multicast Listener Discovery Version 2 (MLDv2) for IPv6This document updates RFC 2710, and it specifies Version 2 of the ulticast Listener Discovery Protocol (MLDv2). MLD is used by an IPv6 router to discover the presence of multicast listeners on directly attached links, and to discover which multicast addresses are of interest to those neighboring nodes. MLDv2 is designed to be interoperable with MLDv1. MLDv2 adds the ability for a node to report interest in listening to packets with a particular multicast address only from specific source addresses or from all sources except for specific source addresses. [STANDARDS-TRACK]Source-Specific Multicast for IPIP version 4 (IPv4) addresses in the 232/8 (232.0.0.0 to 232.255.255.255) range are designated as source-specific multicast (SSM) destination addresses and are reserved for use by source-specific applications and protocols. For IP version 6 (IPv6), the address prefix FF3x::/32 is reserved for source-specific multicast use. This document defines an extension to the Internet network service that applies to datagrams sent to SSM addresses and defines the host and router requirements to support this extension. [STANDARDS-TRACK]YANG - A Data Modeling Language for the Network Configuration Protocol (NETCONF)YANG is a data modeling language used to model configuration and state data manipulated by the Network Configuration Protocol (NETCONF), NETCONF remote procedure calls, and NETCONF notifications. [STANDARDS-TRACK]Network Configuration Protocol (NETCONF)The Network Configuration Protocol (NETCONF) defined in this document provides mechanisms to install, manipulate, and delete the configuration of network devices. It uses an Extensible Markup Language (XML)-based data encoding for the configuration data as well as the protocol messages. The NETCONF protocol operations are realized as remote procedure calls (RPCs). This document obsoletes RFC 4741. [STANDARDS-TRACK]Using the NETCONF Protocol over Secure Shell (SSH)This document describes a method for invoking and running the Network Configuration Protocol (NETCONF) within a Secure Shell (SSH) session as an SSH subsystem. This document obsoletes RFC 4742. [STANDARDS-TRACK]Common YANG Data TypesThis document introduces a collection of common data types to be used with the YANG data modeling language. This document obsoletes RFC 6021.The YANG 1.1 Data Modeling LanguageYANG is a data modeling language used to model configuration data, state data, Remote Procedure Calls, and notifications for network management protocols. This document describes the syntax and semantics of version 1.1 of the YANG language. YANG version 1.1 is a maintenance release of the YANG language, addressing ambiguities and defects in the original specification. There are a small number of backward incompatibilities from YANG version 1. This document also specifies the YANG mappings to the Network Configuration Protocol (NETCONF).RESTCONF ProtocolThis document describes an HTTP-based protocol that provides a programmatic interface for accessing data defined in YANG, using the datastore concepts defined in the Network Configuration Protocol (NETCONF).Ambiguity of Uppercase vs Lowercase in RFC 2119 Key WordsRFC 2119 specifies common key words that may be used in protocol specifications. This document aims to reduce the ambiguity by clarifying that only UPPERCASE usage of the key words have the defined special meanings.Common YANG Data Types for the Routing AreaThis document defines a collection of common data types using the YANG data modeling language. These derived common types are designed to be imported by other modules defined in the routing area.Network Configuration Access Control ModelThe standardization of network configuration interfaces for use with the Network Configuration Protocol (NETCONF) or the RESTCONF protocol requires a structured and secure operating environment that promotes human usability and multi-vendor interoperability. There is a need for standard mechanisms to restrict NETCONF or RESTCONF protocol access for particular users to a preconfigured subset of all available NETCONF or RESTCONF protocol operations and content. This document defines such an access control model.This document obsoletes RFC 6536.Network Management Datastore Architecture (NMDA)Datastores are a fundamental concept binding the data models written in the YANG data modeling language to network management protocols such as the Network Configuration Protocol (NETCONF) and RESTCONF. This document defines an architectural framework for datastores based on the experience gained with the initial simpler model, addressing requirements that were not well supported in the initial model. This document updates RFC 7950.A YANG Data Model for Interface ManagementThis document defines a YANG data model for the management of network interfaces. It is expected that interface-type-specific data models augment the generic interfaces data model defined in this document. The data model includes definitions for configuration and system state (status information and counters for the collection of statistics).The YANG data model in this document conforms to the Network Management Datastore Architecture (NMDA) defined in RFC 8342.This document obsoletes RFC 7223.A YANG Data Model for IP ManagementThis document defines a YANG data model for management of IP implementations. The data model includes configuration and system state.The YANG data model in this document conforms to the Network Management Datastore Architecture defined in RFC 8342.This document obsoletes RFC 7277.A YANG Data Model for Routing Management (NMDA Version)This document specifies three YANG modules and one submodule. Together, they form the core routing data model that serves as a framework for configuring and managing a routing subsystem. It is expected that these modules will be augmented by additional YANG modules defining data models for control-plane protocols, route filters, and other functions. The core routing data model provides common building blocks for such extensions -- routes, Routing Information Bases (RIBs), and control-plane protocols.The YANG modules in this document conform to the Network Management Datastore Architecture (NMDA). This document obsoletes RFC 8022.The Transport Layer Security (TLS) Protocol Version 1.3This document specifies version 1.3 of the Transport Layer Security (TLS) protocol. TLS allows client/server applications to communicate over the Internet in a way that is designed to prevent eavesdropping, tampering, and message forgery.This document updates RFCs 5705 and 6066, and obsoletes RFCs 5077, 5246, and 6961. This document also specifies new requirements for TLS 1.2 implementations.YANG Data Model for Network Access Control Lists (ACLs)This document defines a data model for Access Control Lists (ACLs). An ACL is a user-ordered set of rules used to configure the forwarding behavior in a device. Each rule is used to find a match on a packet and define actions that will be performed on the packet.Informative ReferencesAn Overview of Source-Specific Multicast (SSM)The purpose of this document is to provide an overview of Source-Specific Multicast (SSM) and issues related to its deployment. It discusses how the SSM service model addresses the challenges faced in inter-domain multicast deployment, changes needed to routing protocols and applications to deploy SSM and interoperability issues with current multicast service models. This memo provides information for the Internet community.Considerations for Internet Group Management Protocol (IGMP) and Multicast Listener Discovery (MLD) Snooping SwitchesThis memo describes the recommendations for Internet Group Management Protocol (IGMP) and Multicast Listener Discovery (MLD) snooping switches. These are based on best current practices for IGMPv2, with further considerations for IGMPv3- and MLDv2-snooping. Additional areas of relevance, such as link layer topology changes and Ethernet-specific encapsulation issues, are also considered. This memo provides information for the Internet community.Internet Group Management Protocol (IGMP) / Multicast Listener Discovery (MLD)-Based Multicast Forwarding ("IGMP/MLD Proxying")In certain topologies, it is not necessary to run a multicast routing protocol. It is sufficient for a device to learn and proxy group membership information and simply forward multicast packets based upon that information. This document describes a mechanism for forwarding based solely upon Internet Group Management Protocol (IGMP) or Multicast Listener Discovery (MLD) membership information. [STANDARDS-TRACK]Lightweight Internet Group Management Protocol Version 3 (IGMPv3) and Multicast Listener Discovery Version 2 (MLDv2) ProtocolsThis document describes lightweight IGMPv3 and MLDv2 protocols (LW- IGMPv3 and LW-MLDv2), which simplify the standard (full) versions of IGMPv3 and MLDv2. The interoperability with the full versions and the previous versions of IGMP and MLD is also taken into account. [STANDARDS-TRACK]Tuning the Behavior of the Internet Group Management Protocol (IGMP) and Multicast Listener Discovery (MLD) for Routers in Mobile and Wireless NetworksThe Internet Group Management Protocol (IGMP) and Multicast Listener Discovery (MLD) are the protocols used by hosts and multicast routers to exchange their IP multicast group memberships with each other. This document describes ways to achieve IGMPv3 and MLDv2 protocol optimization for mobility and aims to become a guideline for the tuning of IGMPv3/MLDv2 Queries, timers, and counter values. This document is not an Internet Standards Track specification; it is published for informational purposes.YANG Tree DiagramsThis document captures the current syntax used in YANG module tree diagrams. The purpose of this document is to provide a single location for this definition. This syntax may be updated from time to time based on the evolution of the YANG language.Guidelines for Authors and Reviewers of Documents Containing YANG Data ModelsThis memo provides guidelines for authors and reviewers of specifications containing YANG modules. Recommendations and procedures are defined, which are intended to increase interoperability and usability of Network Configuration Protocol (NETCONF) and RESTCONF protocol implementations that utilize YANG modules. This document obsoletes RFC 6087.Subscription to YANG NotificationsThis document defines a YANG data model and associated mechanisms enabling subscriber-specific subscriptions to a publisher's event streams. Applying these elements allows a subscriber to request and receive a continuous, customized feed of publisher-generated information.Subscription to YANG Notifications for Datastore UpdatesThis document describes a mechanism that allows subscriber applications to request a continuous and customized stream of updates from a YANG datastore. Providing such visibility into updates enables new capabilities based on the remote mirroring and monitoring of configuration and operational state.Acknowledgments
The authors would like to thank Steve Baillargeon, Hu Fangwei,
Robert Kebler, Tanmoy Kundu, and Stig Venaas for their valuable
contributions.Contributors
Yisong Liu
Huawei Technologies
China
Email: liuyisong@huawei.com
Authors' AddressesVolta Networksxufeng.liu.ietf@gmail.comHuawei TechnologiesHuawei Bldg., No. 156 Beiqing Rd.Haidian DistrictBeijing100095Chinaguofeng@huawei.comJuniper Networks1133 Innovation WaySunnyvaleCaliforniaUnited States of Americasivakumar.mahesh@gmail.comMetaswitch Networks100 Church StreetEnfieldEN2 6BQUnited Kingdompete.mcallister@metaswitch.comIP Infusion IndiaRMZ Centennial, Block D 401Kundanahalli Main Road, Mahadevapura PostBangaloreIndiaanish.ietf@gmail.com