A YANG Data Model for Routing Information Base (RIB)
draft-ietf-i2rs-rib-data-model-03
The information below is for an old version of the document.
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|---|---|---|---|
| Authors | Lixing Wang , Hariharan Ananthakrishnan , Mach Chen , Amit Dass , Sriganesh Kini , Nitin Bahadur | ||
| Last updated | 2015-11-01 | ||
| Replaces | draft-wang-i2rs-rib-data-model | ||
| RFC stream | Internet Engineering Task Force (IETF) | ||
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draft-ietf-i2rs-rib-data-model-03
Network Working Group L. Wang
Internet-Draft Individual
Intended status: Standards Track H. Ananthakrishnan
Expires: May 4, 2016 Packet Design
M. Chen
Huawei
A. Dass
S. Kini
Ericsson
N. Bahadur
Bracket Computing
November 1, 2015
A YANG Data Model for Routing Information Base (RIB)
draft-ietf-i2rs-rib-data-model-03
Abstract
This document defines a YANG data model for Routing Information Base
(RIB) that aligns with the I2RS RIB information model.
Requirements Language
The key words "MUST", "MUST NOT", "REQUIRED", "SHALL", "SHALL NOT",
"SHOULD", "SHOULD NOT", "RECOMMENDED", "MAY", and "OPTIONAL" in this
document are to be interpreted as described in RFC 2119 [RFC2119].
Status of This Memo
This Internet-Draft is submitted in full conformance with the
provisions of BCP 78 and BCP 79.
Internet-Drafts are working documents of the Internet Engineering
Task Force (IETF). Note that other groups may also distribute
working documents as Internet-Drafts. The list of current Internet-
Drafts is at http://datatracker.ietf.org/drafts/current/.
Internet-Drafts are draft documents valid for a maximum of six months
and may be updated, replaced, or obsoleted by other documents at any
time. It is inappropriate to use Internet-Drafts as reference
material or to cite them other than as "work in progress."
This Internet-Draft will expire on May 4, 2016.
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Copyright Notice
Copyright (c) 2015 IETF Trust and the persons identified as the
document authors. All rights reserved.
This document is subject to BCP 78 and the IETF Trust's Legal
Provisions Relating to IETF Documents
(http://trustee.ietf.org/license-info) in effect on the date of
publication of this document. Please review these documents
carefully, as they describe your rights and restrictions with respect
to this document. Code Components extracted from this document must
include Simplified BSD License text as described in Section 4.e of
the Trust Legal Provisions and are provided without warranty as
described in the Simplified BSD License.
Table of Contents
1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . 2
1.1. Definitions and Acronyms . . . . . . . . . . . . . . . . 3
1.2. Tree Diagrams . . . . . . . . . . . . . . . . . . . . . . 3
2. Model Structure . . . . . . . . . . . . . . . . . . . . . . . 3
2.1. RIB Capability . . . . . . . . . . . . . . . . . . . . . 7
2.2. Routing Instance and Rib . . . . . . . . . . . . . . . . 7
2.3. Route . . . . . . . . . . . . . . . . . . . . . . . . . . 8
2.4. Nexthop . . . . . . . . . . . . . . . . . . . . . . . . . 9
2.5. RPC Operations . . . . . . . . . . . . . . . . . . . . . 13
2.6. Notifications . . . . . . . . . . . . . . . . . . . . . . 16
3. YANG Modules . . . . . . . . . . . . . . . . . . . . . . . . 17
4. IANA Considerations . . . . . . . . . . . . . . . . . . . . . 59
5. Security Considerations . . . . . . . . . . . . . . . . . . . 59
6. Contributors . . . . . . . . . . . . . . . . . . . . . . . . 59
7. References . . . . . . . . . . . . . . . . . . . . . . . . . 60
7.1. Normative References . . . . . . . . . . . . . . . . . . 60
7.2. Informative References . . . . . . . . . . . . . . . . . 60
Authors' Addresses . . . . . . . . . . . . . . . . . . . . . . . 60
1. Introduction
The Interface to the Routing System (I2RS)
[I-D.ietf-i2rs-architecture] provides read and write access to the
information and state within the routing process that exists inside
the routing elements, this is achieved via the protocol message
exchange between I2RS clients and I2RS agents associated with the
routing system. One of the functions of I2RS is to read and write
data of Routing Information Base (RIB).
[I-D.ietf-i2rs-usecase-reqs-summary] introduces a set of RIB use
cases and the RIB information model is defined in
[I-D.ietf-i2rs-rib-info-model].
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This document defines a YANG [RFC6020][RFC6991] data model for the
RIB that satisfies the RIB use cases and aligns with the RIB
information model.
1.1. Definitions and Acronyms
RIB: Routing Information Base
Information Model (IM): An abstract model of a conceptual domain,
independent of a specific implementation or data representation.
1.2. Tree Diagrams
A simplified graphical representation of the data model is used in
this document. The meaning of the symbols in these diagrams is as
follows:
o Brackets "[" and "]" enclose list keys.
o Abbreviations before data node names: "rw" means configuration
(read-write) and "ro" state data (read-only).
o Symbols after data node names: "?" means an optional node and "*"
denotes a "list" and "leaf-list".
o Parentheses enclose choice and case nodes, and case nodes are also
marked with a colon (":").
o Ellipsis ("...") stands for contents of subtrees that are not
shown.
2. Model Structure
The following figure shows an overview of structure tree of the i2rs-
rib module. To give a whole view of the structure tree, some details
of the tree are omitted. The detail are introduced in the following
sub-sections.
module: ietf-i2rs-rib
+--rw routing-instance
+--rw name string
+--rw interface-list* [name]
| +--rw name if:interface-ref
+--rw router-id? yang:dotted-quad
+--rw lookup-limit? uint8
+--rw rib-list* [name]
+--rw name string
+--rw rib-family rib-family-def
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+--rw ip-rpf-check? boolean
+--rw route-list* [route-index]
+--rw route-index uint64
+--rw match
| +--rw (route-type)?
| +--:(ipv4)
| | ...
| +--:(ipv6)
| | ...
| +--:(mpls-route)
| | ...
| +--:(mac-route)
| | ...
| +--:(interface-route)
| ...
+--rw nexthop
| +--rw nexthop-id uint32
| +--rw sharing-flag boolean
| +--rw (nexthop-type)?
| +--:(nexthop-base)
| | ...
| +--:(nexthop-chain) {nexthop-chain}?
| | ...
| +--:(nexthop-replicates) {nexthop-replicates}?
| | ...
| +--:(nexthop-protection) {nexthop-protection}?
| | ...
| +--:(nexthop-load-balance) {nexthop-load-balance}?
| ...
+--rw route-statistic
| ...
+--rw route-attributes
| ...
+--rw route-vendor-attributes
rpcs:
+---x rib-add
| +--ro input
| | +--ro rib-name string
| | +--ro rib-family rib-family-def
| | +--ro ip-rpf-check? boolean
| +--ro output
| +--ro result boolean
+---x rib-delete
| +--ro input
| | +--ro rib-name string
| +--ro output
| +--ro result boolean
+---x route-add
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| +--ro input
| | +--ro rib-name string
| | +--ro routes
| | +--ro route-list* [route-index]
| | ...
| +--ro output
| +--ro result boolean
+---x route-delete
| +--ro input
| | +--ro rib-name string
| | +--ro routes
| | +--ro route-list* [route-index]
| | ...
| +--ro output
| +--ro result boolean
+---x route-update
| +--ro input
| | +--ro rib-name string
| | +--ro (match-conditions)?
| | +--:(match-route-prefix)
| | | ...
| | +--:(match-route-attributes)
| | | ...
| | +--:(match-route-vendor-attributes) {...vendor-attributes}?
| | | ...
| | +--:(match-nexthop)
| | ...
| +--ro output
| +--ro result boolean
+---x nh-add
| +--ro input
| | +--ro rib-name string
| | +--ro nexthop-id uint32
| | +--ro sharing-flag boolean
| | +--ro (nexthop-type)?
| | +--:(nexthop-base)
| | | ...
| | +--:(nexthop-chain) {nexthop-chain}?
| | | ...
| | +--:(nexthop-replicates) {nexthop-replicates}?
| | | ...
| | +--:(nexthop-protection) {nexthop-protection}?
| | | ...
| | +--:(nexthop-load-balance) {nexthop-load-balance}?
| | ...
| +--ro output
| +--ro result boolean
| +--ro nexthop-id uint32
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+---x nh-delete
+--ro input
| +--ro rib-name string
| +--ro nexthop-id uint32
| +--ro sharing-flag boolean
| +--ro (nexthop-type)?
| +--:(nexthop-base)
| | ...
| +--:(nexthop-chain) {nexthop-chain}?
| | ...
| +--:(nexthop-replicates) {nexthop-replicates}?
| | ...
| +--:(nexthop-protection) {nexthop-protection}?
| | ...
| +--:(nexthop-load-balance) {nexthop-load-balance}?
| ...
+--ro output
+--ro result boolean
notifications:
+---n nexthop-resolution-status-change
| +--ro nexthop
| | +--ro nexthop-id uint32
| | +--ro sharing-flag boolean
| | +--ro (nexthop-type)?
| | +--:(nexthop-base)
| | | ...
| | +--:(nexthop-chain) {nexthop-chain}?
| | | ...
| | +--:(nexthop-replicates) {nexthop-replicates}?
| | | ...
| | +--:(nexthop-protection) {nexthop-protection}?
| | | ...
| | +--:(nexthop-load-balance) {nexthop-load-balance}?
| | ...
| +--ro nexthop-state nexthop-state-def
+---n route-change
+--ro rib-name string
+--ro rib-family rib-family-def
+--ro route-index uint64
+--ro match
| +--ro (route-type)?
| +--:(ipv4)
| | ...
| +--:(ipv6)
| | ...
| +--:(mpls-route)
| | ...
| +--:(mac-route)
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| | ...
| +--:(interface-route)
| ...
+--ro route-installed-state route-installed-state-def
+--ro route-state route-state-def
+--ro route-change-reason route-reason-def
Figure 1: Overview of I2RS Rib Module Structure
2.1. RIB Capability
RIB capability negotiation is very important because not all of the
hardware will be able to support all kinds of nexthops and there
should be a limitation on how many levels of lookup can be
practically performed. Therefore, a RIB data model MUST specify a
way for an external entity to learn about the functional capabilities
of a network device.
At the same time, nexthop chains can be used to specify multiple
headers over a packet, before that particular packet is forwarded.
Not every network device will be able to support all kinds of nexthop
chains along with the arbitrary number of headers which are chained
together. The RIB data model MUST provide a way to expose the
nexthop chaining capability supported by a given network device.
This module uses the feature and if-feature statements to achieve
above capability negotiation.
2.2. Routing Instance and Rib
A routing instance, in the context of the RIB information model, is a
collection of RIBs, interfaces, and routing protocol parameters. A
routing instance creates a logical slice of the router and can allow
multiple different logical slices; across a set of routers; to
communicate with each other. And the routing protocol parameters
control the information available in the RIBs. More detail about
routing instance can be found in Section 2.2 of
[I-D.ietf-i2rs-rib-info-model].
As described in [I-D.ietf-i2rs-rib-info-model], there will be
multiple routing instances for a router. At the same time, for a
routing instance, there would be multiple RIBs as well. Therefore,
this model uses "list" to express the RIBs. The structure tree is
shown as following figure.
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+--rw routing-instance
+--rw name string
+--rw interface-list* [name]
| +--rw name if:interface-ref
+--rw router-id? yang:dotted-quad
+--rw lookup-limit? uint8
+--rw rib-list* [name]
+--rw name string
+--rw rib-family rib-family-def
+--rw ip-rpf-check? boolean
+--rw route-list* [route-index]
... (refer to Section 2.3)
Figure 2: Routing Instance Stuture
2.3. Route
A route is essentially a match condition and an action following that
match. The match condition specifies the kind of route (e.g., IPv4,
MPLS, MAC, Interface etc.) and the set of fields to match on.
According to the definition in [I-D.ietf-i2rs-rib-info-model], a
route MUST associate with the following attributes:
o ROUTE_PREFERENCE: See Section 2.3 of
[I-D.ietf-i2rs-rib-info-model].
o ACTIVE: Indicates whether a route is fully resolved and is a
candidate for selection.
o INSTALLED: Indicates whether the route got installed in the FIB.
In addition, a route can associate with one or more optional route
attributes(e.g., route-vendor-attributes).
For a RIB, there will have a number of routes, so the routes are
expressed as a list under the rib list.
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+--rw route-list* [route-index]
+--rw route-index uint64
+--rw match
| +--rw (route-type)?
| +--:(ipv4)
| | +--rw ipv4
| | +--rw (ip-route-match-type)?
| | +--:(dest-ipv4-address)
| | | ...
| | +--:(src-ipv4-address)
| | | ...
| | +--:(dest-src-ipv4-address)
| | ...
| +--:(ipv6)
| | +--rw ipv6
| | +--rw (ip-route-match-type)?
| | +--:(dest-ipv6-address)
| | | ...
| | +--:(src-ipv6-address)
| | | ...
| | +--:(dest-src-ipv6-address)
| | ...
| +--:(mpls-route)
| | +--rw mpls-label uint32
| +--:(mac-route)
| | +--rw mac-address uint32
| +--:(interface-route)
| +--rw interface-identifier if:interface-ref
+--rw nexthop
| ...(refer to Section 2.4)
Figure 3: Routes Structure
2.4. Nexthop
A nexthop represents an object resulting from a route lookup. As
illustrated in Section 2.4 of [I-D.ietf-i2rs-rib-info-model], to
support various of use cases (e.g., load balance, protection,
multicast or the combination of them), the nexthop is modelled as a
multi-level structure and supports recursion. The first level of the
nexthop includes the following four types:
o Base: The "base" nexthop itself is a hierarchical structure, it is
the base of all other nexthop types. The first level of the base
nexthop includes special-nexthop and nexthop-chain. The nexthop-
chain can have one or more nexthop chain members, each member is
one of the four types (as listed below) of specific nexthop.
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Other first level nexthop (e.g., load-balance, protection and
replicate) will finally be iterated to a "base" nexthop.
* nexthop-id
* egress-interface
* logical-tunnel
* tunnel-encap
o Load-balance: Designed for load-balance case where it normally
will have multiple weighted nexthops.
o Protection: Designed for protection scenario where it normally
will have primary and standby nexthop.
o Replicate: Designed for multiple destinations forwarding.
The structure tree of nexthop is shown in the following figures.
+--rw nexthop
| +--rw nexthop-id uint32
| +--rw sharing-flag boolean
| +--rw (nexthop-type)?
| +--:(nexthop-base)
| | ...(refer to Figure 5)
| +--:(nexthop-chain) {nexthop-chain}?
| | +--rw nexthop-chain
| | +--rw nexthop-list* [nexthop-member-id]
| | +--rw nexthop-member-id uint32
| +--:(nexthop-replicates) {nexthop-replicates}?
| | +--rw nexthop-replicates
| | +--rw nexthop-list* [nexthop-member-id]
| | +--rw nexthop-member-id uint32
| +--:(nexthop-protection) {nexthop-protection}?
| | +--rw nexthop-protection
| | +--rw nexthop-list* [nexthop-member-id]
| | +--rw nexthop-member-id uint32
| | +--rw nexthop-preference nexthop-preference-def
| +--:(nexthop-load-balance) {nexthop-load-balance}?
| +--rw nexthop-lbs
| +--rw nexthop-list* [nexthop-member-id]
| +--rw nexthop-member-id uint32
| +--rw nexthop-lb-weight nexthop-lb-weight-def
Figure 4: Nexhop Structure
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Figure 5 (as shown blow) is a sub-tree of nexthop, it's under the
nexthop base node.
+--:(nexthop-base)
| +--rw nexthop-base
| +--rw (nexthop-base-type)?
| +--:(special-nexthop)
| | +--rw special? special-nexthop-def
| +--:(egress-interface-nexthop)
| | +--rw outgoing-interface if:interface-ref
| +--:(ipv4-address-nexthop)
| | +--rw ipv4-address inet:ipv4-address
| +--:(ipv6-address-nexthop)
| | +--rw ipv6-address inet:ipv6-address
| +--:(egress-interface-ipv4-nexthop)
| | +--rw egress-interface-ipv4-address
| | +--rw outgoing-interface if:interface-ref
| | +--rw ipv4-address inet:ipv4-address
| +--:(egress-interface-ipv6-nexthop)
| | +--rw egress-interface-ipv6-address
| | +--rw outgoing-interface if:interface-ref
| | +--rw ipv6-address inet:ipv6-address
| +--:(egress-interface-mac-nexthop)
| | +--rw egress-interface-mac-address
| | +--rw outgoing-interface if:interface-ref
| | +--rw ieee-mac-address uint32
| +--:(tunnel-encap-nexthop) {nexthop-tunnel}?
| | +--rw tunnel-encap
| | +--rw (tunnel-type)?
| | +--:(ipv4) {ipv4-tunnel}?
| | | +--rw src-ipv4-address inet:ipv4-address
| | | +--rw dest-ipv4-address inet:ipv4-address
| | | +--rw protocol uint8
| | | +--rw ttl? uint8
| | | +--rw dscp? uint8
| | +--:(ipv6) {ipv6-tunnel}?
| | | +--rw src-ipv6-address inet:ipv6-address
| | | +--rw dest-ipv6-address inet:ipv6-address
| | | +--rw next-header uint8
| | | +--rw traffic-class? uint8
| | | +--rw flow-label? uint16
| | | +--rw hop-limit? uint8
| | +--:(mpls) {mpls-tunnel}?
| | | +--rw label-operations* [label-oper-id]
| | | +--rw label-oper-id uint32
| | | +--rw (label-actions)?
| | | +--:(label-push)
| | | | +--rw label-push
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| | | | +--rw label uint32
| | | | +--rw s-bit? boolean
| | | | +--rw tc-value? uint8
| | | | +--rw ttl-value? uint8
| | | +--:(label-swap)
| | | +--rw label-swap
| | | +--rw in-label uint32
| | | +--rw out-label uint32
| | | +--rw ttl-action? ttl-action-def
| | +--:(gre) {gre-tunnel}?
| | | +--rw (dest-address-type)?
| | | | +--:(ipv4)
| | | | | +--rw ipv4-dest inet:ipv4-address
| | | | +--:(ipv6)
| | | | +--rw ipv6-dest inet:ipv6-address
| | | +--rw protocol-type uint16
| | | +--rw key? uint64
| | +--:(nvgre) {nvgre-tunnel}?
| | | +--rw (nvgre-type)?
| | | | +--:(ipv4)
| | | | | +--rw src-ipv4-address inet:ipv4-address
| | | | | +--rw dest-ipv4-address inet:ipv4-address
| | | | | +--rw protocol uint8
| | | | | +--rw ttl? uint8
| | | | | +--rw dscp? uint8
| | | | +--:(ipv6)
| | | | +--rw src-ipv6-address inet:ipv6-address
| | | | +--rw dest-ipv6-address inet:ipv6-address
| | | | +--rw next-header uint8
| | | | +--rw traffic-class? uint8
| | | | +--rw flow-label? uint16
| | | | +--rw hop-limit? uint8
| | | +--rw virtual-subnet-id uint32
| | | +--rw flow-id? uint16
| | +--:(vxlan) {vxlan-tunnel}?
| | +--rw (vxlan-type)?
| | | +--:(ipv4)
| | | | +--rw src-ipv4-address inet:ipv4-address
| | | | +--rw dest-ipv4-address inet:ipv4-address
| | | | +--rw protocol uint8
| | | | +--rw ttl? uint8
| | | | +--rw dscp? uint8
| | | +--:(ipv6)
| | | +--rw src-ipv6-address inet:ipv6-address
| | | +--rw dest-ipv6-address inet:ipv6-address
| | | +--rw next-header uint8
| | | +--rw traffic-class? uint8
| | | +--rw flow-label? uint16
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| | | +--rw hop-limit? uint8
| | +--rw vxlan-identifier uint32
| +--:(tunnel-decap-nexthp) {nexthop-tunnel}?
| | +--rw tunnel-decap
| | +--rw (tunnel-type)?
| | +--:(ipv4) {ipv4-tunnel}?
| | | +--rw ipv4-decap
| | | +--rw ipv4-decap tunnel-decap-action-def
| | | +--rw ttl-action? ttl-action-def
| | +--:(ipv6) {ipv6-tunnel}?
| | | +--rw ipv6-decap
| | | +--rw ipv6-decap tunnel-decap-action-def
| | | +--rw hop-limit-action? hop-limit-action-def
| | +--:(mpls) {mpls-tunnel}?
| | +--rw label-pop
| | +--rw label-pop mpls-label-action-def
| | +--rw ttl-action? ttl-action-def
| +--:(logical-tunnel-nexthop) {nexthop-tunnel}?
| | +--rw logical-tunnel
| | +--rw tunnel-type tunnel-type-def
| | +--rw tunnel-name string
| +--:(rib-name-nexthop)
| +--rw rib-name? string
Figure 5: Nexthop Base Structure
2.5. RPC Operations
This module defines the following RPC operations:
o rib-add: It is defined to add a rib to a routing instance. A name
of the rib, address family of the rib and whether the RPF check is
enabled are passed as the input parameters. The output is the
result of the add operation: 1 means success, and 0 means failed.
o rib-delete: It is defined to delete a rib from a routing instance.
When a rib is deleted, all routes installed in the rib will be
deleted. A name of the rib is passed as the input parameter. The
output is the result of the delete operation: 1 means success, and
0 means failed.
o route-add: It is defined to add a route or a set of routes to a
rib. A rib name, the route prefix(es), route attributes, route
vendor attributes and nexthop are passed as the input parameters.
The output is the result of the add operation: 1 means success,
and 0 means failed. Before calling the route-add rpc, it is
required to call the nh-add rpc to create and/or return the
nexthop identifier.
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o route-delete: It is defined to delete a route or a set of routes
from a rib. A name of the rib and the route prefix(es) are passed
as the input parameters. The output is the result of the delete
operation: 1 means success, and 0 means failed.
o route-update: It is defined to update a route or a set of routes.
A rib name, the route prefix(es), or route attributes, or route
vendor attributes, or nexthop are passed as the input parameters.
The match conditions can be either route prefix(es), or route
attributes, or route vendor attributes, or nexthop. The update
actions include: update the nexthop, update the route attributes,
update the route vendor attributes. The output is the result of
the update operation: 1 means success, and 0 means failed.
o nh-add: It is defined to add a nexthop to a rib. A name of the
rib and a nexthop are passed as the input parameters. The network
node is required to allocate a nexhop identifier to the nexthop.
The outputs include the result of the update operation (1 means
success, and 0 means failed ) and the nexthop identifier that is
allocated to the nexthop.
o nh-delete: It is defined to delete a nexthop from a rib. A name
of a rib and a nexthop or nexthop identifier are passed as the
input parameters. The output is the result of the delete
operation: 1 means success, 0 means failed.
The structure tree of rpcs is showing in following figure.
rpcs:
+---x rib-add
| +--ro input
| | +--ro rib-name string
| | +--ro rib-family rib-family-def
| | +--ro ip-rpf-check? boolean
| +--ro output
| +--ro result boolean
+---x rib-delete
| +--ro input
| | +--ro rib-name string
| +--ro output
| +--ro result boolean
+---x route-add
| +--ro input
| | +--ro rib-name string
| | +--ro routes
| | +--ro route-list* [route-index]
| | ...
| +--ro output
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| +--ro result boolean
+---x route-delete
| +--ro input
| | +--ro rib-name string
| | +--ro routes
| | +--ro route-list* [route-index]
| | ...
| +--ro output
| +--ro result boolean
+---x route-update
| +--ro input
| | +--ro rib-name string
| | +--ro (match-conditions)?
| | +--:(match-route-prefix)
| | | ...
| | +--:(match-route-attributes)
| | | ...
| | +--:(match-route-vendor-attributes) {..vendor-attributes}?
| | | ...
| | +--:(match-nexthop)
| | ...
| +--ro output
| +--ro result boolean
+---x nh-add
| +--ro input
| | +--ro rib-name string
| | +--ro nexthop-id uint32
| | +--ro sharing-flag boolean
| | +--ro (nexthop-type)?
| | ...
| +--ro output
| +--ro result boolean
| +--ro nexthop-id uint32
+---x nh-delete
+--ro input
| +--ro rib-name string
| +--ro nexthop-id uint32
| +--ro sharing-flag boolean
| +--ro (nexthop-type)?
| ...
+--ro output
+--ro result boolean
Figure 6: RPCs Structure
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2.6. Notifications
Asynchronous notifications are sent by the RIB manager of a network
device to an external entity when some event triggers on the network
device. A RIB data-model MUST support sending 2 kind of asynchronous
notifications.
1. Route change notification:
o Installed (Indicates whether the route got installed in the FIB) ;
o Active (Indicates whether a route is fully resolved and is a
candidate for selection) ;
o Reason - E.g. Not authorized
2. Nexthop resolution status notification
Nexthops can be fully resolved nexthops or an unresolved nexthop.
A resolved nexthop has adequate level of information to send the
outgoing packet towards the destination by forwarding it on an
interface of a directly connected neighbor.
An unresolved nexthop is something that requires the RIB manager to
determine the final resolved nexthop. For example, in a case when a
nexthop could be an IP address. The RIB manager would resolve how to
reach that IP address, e.g. by checking if that particular IP is
address reachable by regular IP forwarding or by a MPLS tunnel or by
both. If the RIB manager cannot resolve the nexthop, then the
nexthop remains in an unresolved state and is NOT a suitable
candidate for installation in the FIB.
The structure tree of notifications is shown in the following figure.
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notifications:
+---n nexthop-resolution-status-change
| +--ro nexthop
| | +--ro nexthop-id uint32
| | +--ro sharing-flag boolean
| | +--ro (nexthop-type)?
| | +--:(nexthop-base)
| | | ...
| | +--:(nexthop-chain) {nexthop-chain}?
| | | ...
| | +--:(nexthop-replicates) {nexthop-replicates}?
| | | ...
| | +--:(nexthop-protection) {nexthop-protection}?
| | | ...
| | +--:(nexthop-load-balance) {nexthop-load-balance}?
| | ...
| +--ro nexthop-state nexthop-state-def
+---n route-change
+--ro rib-name string
+--ro rib-family rib-family-def
+--ro route-index uint64
+--ro match
| +--ro (route-type)?
| +--:(ipv4)
| | ...
| +--:(ipv6)
| | ...
| +--:(mpls-route)
| | ...
| +--:(mac-route)
| | ...
| +--:(interface-route)
| ...
+--ro route-installed-state route-installed-state-def
+--ro route-state route-state-def
+--ro route-change-reason route-reason-def
Figure 7: Notifications Structure
3. YANG Modules
//<CODE BEGINS> file "ietf i2rs rib@2015-10-28.yang"
module ietf-i2rs-rib {
namespace "urn:ietf:params:xml:ns:yang:ietf-i2rs-rib";
// replace with iana namespace when assigned
prefix "iir";
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import ietf-inet-types {
prefix inet;
//rfc6991
}
import ietf-interfaces {
prefix "if";
}
import ietf-yang-types {
prefix yang;
}
organization
"IETF I2RS (Interface to Routing System) Working Group";
contact
"WG Web: <http://tools.ietf.org/wg/i2rs/>
WG List: <mailto:i2rs@ietf.org>
WG Chair: Susan Hares
<mailto:shares@ndzh.com>
WG Chair: Jeffrey Haas
<mailto:jhaas@pfrc.org>
Editor: Lixing Wang
<mailto:wang_little_star@sina.com>
Editor: Hariharan Ananthakrishnan
<mailto:hari@packetdesign.com>
Editor: Mach(Guoyi) Chen
<mailto:mach.chen@huawei.com>
Editor: Amit Dass
<mailto:amit.dass@ericsson.com>
Editor: Sriganesh Kini
<mailto:sriganesh.kini@ericsson.com>
Editor: Nitin Bahadur
<mailto:nitin_bahadur@yahoo.com>";
description
"This module defines a YANG data model for
Routing Information Base (RIB) that aligns
with the I2RS RIB information model.";
revision "2015-10-28" {
description "initial revision";
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reference "draft-ietf-i2rs-rib-info-model-08";
}
//Features
feature nexthop-tunnel {
description
"This feature means that a node support
tunnel nexhtop capability.";
}
feature nexthop-chain {
description
"This feature means that a node support
chain nexhtop capability.";
}
feature nexthop-protection {
description
"This feature means that a node support
protection nexhtop capability.";
}
feature nexthop-replicates {
description
"This feature means that a node support
relicates nexhtop capability.";
}
feature nexthop-load-balance {
description
"This feature means that a node support
load balance nexhtop capability.";
}
feature ipv4-tunnel {
description
"This feature means that a node support
IPv4 tunnel encapsulation capability.";
}
feature ipv6-tunnel {
description
"This feature means that a node support
IPv6 tunnel encapsulation capability.";
}
feature mpls-tunnel {
description
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"This feature means that a node support
MPLS tunnel encapsulation capability.";
}
feature vxlan-tunnel {
description
"This feature means that a node support
VxLAN tunnel encapsulation capability.";
}
feature gre-tunnel {
description
"This feature means that a node support
GRE tunnel encapsulation capability.";
}
feature nvgre-tunnel {
description
"This feature means that a node support
NvGRE tunnel encapsulation capability.";
}
feature route-vendor-attributes {
description
"This feature means that a node support
route vendor attributes.";
}
//Identities and Type Definitions
identity mpls-label-action {
description
"Base identify from which all mpls label
operations are derived.
The MPLS label stack operations include:
push - to add a new label to a label stack,
pop - to pop the top label from a label stack,
swap - to change the top label of a label
stack with new label.";
}
identity label-push {
base "mpls-label-action";
description
"MPLS label stack operation: push.";
}
identity label-pop {
base "mpls-label-action";
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description
"MPLS label stack operation: pop.";
}
identity label-swap {
base "mpls-label-action";
description
"MPLS label stack operation: swap.";
}
typedef mpls-label-action-def {
type identityref {
base "mpls-label-action";
}
description
"MPLS label action def.";
}
identity tunnel-decap-action {
description
"Base identify from which all tunnel decap
actions are derived.
Tunnel decap actions include:
ipv4-decap - to decap an IPv4 tunnel,
ipv6-decap - to decap an IPv6 tunnel.";
}
identity ipv4-decap {
base "tunnel-decap-action";
description
"IPv4 tunnel decap.";
}
identity ipv6-decap {
base "tunnel-decap-action";
description
"IPv4 tunnel decap.";
}
typedef tunnel-decap-action-def {
type identityref {
base "tunnel-decap-action";
}
description
"Tunnel decap def.";
}
identity ttl-action {
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description
"Base identify from which all TTL
actions are derived.
The tll actions include:
- ttl-no-action: do nothing regarding the TTL, or
- ttl-copy-to-inner: copy the TTL of the outer
header to inner header, or
- ttl-decrease-and-copy-to-inner: Decrease the TTL
by one and copy it to inner header.";
}
identity no-action {
base "ttl-action";
description
"Do nothing regarding the TTL.";
}
identity copy-to-inner {
base "ttl-action";
description
"Copy the TTL of the outer header
to inner header.";
}
identity decrease-and-copy-to-inner {
base "ttl-action";
description
"Decrease TTL by one and copy the TTL
to inner header.";
}
identity decrease-and-copy-to-next {
base "ttl-action";
description
"Decrease TTL by one and copy the TTL
to the next header.For example: when
MPLS label swapping, decrease the TTL
of the in label and copy it to the out
label.";
}
typedef ttl-action-def {
type identityref {
base "ttl-action";
}
description
"TTL action def.";
}
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identity hop-limit-action {
description
"Base identify from which all hop limit
actions are derived.";
}
identity hop-limit-no-action {
base "hop-limit-action";
description
"Do nothing regarding the hop limit.";
}
identity hop-limit-copy-to-inner {
base "hop-limit-action";
description
"Copy the hop limit of the outer header
to inner header.";
}
typedef hop-limit-action-def {
type identityref {
base "hop-limit-action";
}
description
"IPv6 hop limit action def.";
}
identity special-nexthop {
description
"Base identify from which all special
nexthops are derived.";
}
identity discard {
base "special-nexthop";
description
"This indicates that the network
device should drop the packet and
increment a drop counter.";
}
identity discard-with-error {
base "special-nexthop";
description
"This indicates that the network
device should drop the packet,
increment a drop counter and send
back an appropriate error message
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(like ICMP error).";
}
identity receive {
base "special-nexthop";
description
"This indicates that that the traffic is
destined for the network device. For
example, protocol packets or OAM packets.
All locally destined traffic SHOULD be
throttled to avoid a denial of service
attack on the router's control plane. An
optional rate-limiter can be specified
to indicate how to throttle traffic
destined for the control plane.";
}
identity cos-value {
base "special-nexthop";
description
"Cos-value special nexthop.";
}
typedef special-nexthop-def {
type identityref {
base "special-nexthop";
}
description
"Special nexthop def.";
}
identity ip-route-match-type {
description
"Base identify from which all route
match types are derived.
Route match type could be:
match source, or
match destination, or
match source and destination.";
}
identity match-ip-src {
base "ip-route-match-type";
description
"Source route match type.";
}
identity match-ip-dest {
base "ip-route-match-type";
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description
"Destination route match type";
}
identity match-ip-src-dest {
base "ip-route-match-type";
description
"Src and Dest route match type";
}
typedef ip-route-match-type-def {
type identityref {
base "ip-route-match-type";
}
description
"IP route match type def.";
}
identity rib-family {
description
"Base identify from which all rib
address families are derived.";
}
identity ipv4-rib-family {
base "rib-family";
description
"IPv4 rib address family.";
}
identity ipv6-rib-family {
base "rib-family";
description
"IPv6 rib address family.";
}
identity mpls-rib-family {
base "rib-family";
description
"MPLS rib address family.";
}
identity ieee-mac-rib-family {
base "rib-family";
description
"MAC rib address family.";
}
typedef rib-family-def {
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type identityref {
base "rib-family";
}
description
"Rib address family def.";
}
identity route-type {
description
"Base identify from which all route types
are derived.";
}
identity ipv4-route {
base "route-type";
description
"IPv4 route type.";
}
identity ipv6-route {
base "route-type";
description
"IPv6 route type.";
}
identity mpls-route {
base "route-type";
description
"MPLS route type.";
}
identity ieee-mac {
base "route-type";
description
"MAC route type.";
}
identity interface {
base "route-type";
description
"Interface route type.";
}
typedef route-type-def {
type identityref {
base "route-type";
}
description
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"Route type def.";
}
identity tunnel-type {
description
"Base identify from which all tunnel
types are derived.";
}
identity ipv4-tunnel {
base "tunnel-type";
description
"IPv4 tunnel type";
}
identity ipv6-tunnel {
base "tunnel-type";
description
"IPv6 Tunnel type";
}
identity mpls-tunnel {
base "tunnel-type";
description
"MPLS tunnel type";
}
identity gre-tunnel {
base "tunnel-type";
description
"GRE tunnel type";
}
identity vxlan-tunnel {
base "tunnel-type";
description
"VxLAN tunnel type";
}
identity nvgre-tunnel {
base "tunnel-type";
description
"NVGRE tunnel type";
}
typedef tunnel-type-def {
type identityref {
base "tunnel-type";
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}
description
"Tunnel type def.";
}
identity route-state {
description
"Base identify from which all route
states are derived.";
}
identity active {
base "route-state";
description
"Active state.";
}
identity inactive {
base "route-state";
description
"Inactive state.";
}
typedef route-state-def {
type identityref {
base "route-state";
}
description
"Route state def.";
}
identity nexthop-state {
description
"Base identify from which all nexthop
states are derived.";
}
identity resolved {
base "nexthop-state";
description
"Reolved nexthop state.";
}
identity unresolved {
base "nexthop-state";
description
"Unresolved nexthop state.";
}
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typedef nexthop-state-def {
type identityref {
base "nexthop-state";
}
description
"Nexthop state def.";
}
identity route-installed-state {
description
"Base identify from which all route
installed states are derived.";
}
identity uninstalled {
base "route-installed-state";
description
"Uninstalled state.";
}
identity installed {
base "route-installed-state";
description
"Installed state.";
}
typedef route-installed-state-def {
type identityref {
base "route-installed-state";
}
description
"Route installed state def.";
}
identity route-reason {
description
"Base identify from which all route
reasons are derived.";
}
identity low-preference {
base "route-reason";
description
"Low preference";
}
identity unresolved-nexthop {
base "route-reason";
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description
"Unresolved nexthop";
}
identity higher-metric {
base "route-reason";
description
"Higher metric";
}
typedef route-reason-def {
type identityref {
base "route-reason";
}
description
"Route reason def.";
}
typedef nexthop-preference-def {
type uint8 {
range "1..99";
}
description
"Nexthop-preference is used for protection schemes.
It is an integer value between 1 and 99. A lower
value indicates higher preference. To download a
primary/standby/tertiary group to the FIB, the
nexthops that are resolved and have two highest
preferences are selected.";
}
typedef nexthop-lb-weight-def {
type uint8 {
range "1..99";
}
description
"Nhop-lb-weight is a number between 1 and 99.";
}
//Groupings
grouping route-prefix {
description
"The common attributes used for all types of route prefix.";
leaf route-index {
type uint64 ;
mandatory true;
description
"Route index.";
}
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container match {
description
"The match condition specifies the
kind of route (IPv4, MPLS, etc.)
and the set of fields to match on.";
choice route-type {
description
"Route types: IPv4, IPv6, MPLS, MAC etc.";
case ipv4 {
description
"IPv4 route case.";
container ipv4 {
description
"IPv4 route match.";
choice ip-route-match-type {
description
"IP route match type options:
match source, or
match destination, or
match source and destination.";
case dest-ipv4-address {
leaf dest-ipv4-prefix {
type inet:ipv4-prefix;
mandatory true;
description
"An IPv4 destination address as the match.";
}
}
case src-ipv4-address {
leaf src-ipv4-prefix {
type inet:ipv4-prefix;
mandatory true;
description
"An IPv4 source address as the match.";
}
}
case dest-src-ipv4-address {
container dest-src-ipv4-address {
description
"A combination of an IPv4 source and
an IPv4 destination address as the match.";
leaf dest-ipv4-prefix {
type inet:ipv4-prefix;
mandatory true;
description
"The IPv4 destination address of the match.";
}
leaf src-ipv4-prefix {
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type inet:ipv4-prefix;
mandatory true;
description
"The IPv4 source address of the match";
}
}
}
}
}
}
case ipv6 {
description
"IPv6 route case.";
container ipv6 {
description
"IPv6 route match.";
choice ip-route-match-type {
description
"IP route match type options:
match source, or
match destination, or
match source and destination.";
case dest-ipv6-address {
leaf dest-ipv6-prefix {
type inet:ipv6-prefix;
mandatory true;
description
"An IPv6 destination address as the match.";
}
}
case src-ipv6-address {
leaf src-ipv6-prefix {
type inet:ipv6-prefix;
mandatory true;
description
"An IPv6 source address as the match.";
}
}
case dest-src-ipv6-address {
container dest-src-ipv6-address {
description
"A combination of an IPv6 source and
an IPv6 destination address as the match.";
leaf dest-ipv6-prefix {
type inet:ipv6-prefix;
mandatory true;
description
"The IPv6 destination address of the match";
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}
leaf src-ipv6-prefix {
type inet:ipv6-prefix;
mandatory true;
description
"The IPv6 source address of the match.";
}
}
}
}
}
}
case mpls-route {
description
"MPLS route case.";
leaf mpls-label {
type uint32 ;
mandatory true;
description
"The label used for matching.";
}
}
case mac-route {
description
"MAC rib case.";
leaf mac-address {
type uint32 ;
mandatory true;
description
"The MAC address used for matching.";
}
}
case interface-route {
description
"Interface route case.";
leaf interface-identifier {
type if:interface-ref;
mandatory true;
description
"The interface used for matching.";
}
}
}
}
}
grouping route {
description
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"The common attributes usesd for all types of route.";
uses route-prefix;
container nexthop {
description
"The nexthop of the route.";
uses nexthop;
}
container route-statistic {
description
"The statistic information of the route.";
leaf route-state {
type route-state-def;
config false;
description
"Indicate a route's state: Active or Inactive.";
}
leaf route-installed-state {
type route-installed-state-def;
config false;
description
"Indicate that a route's installed states:
Installed or uninstalled.";
}
leaf route-reason {
type route-reason-def;
config false;
description
"Indicate the route reason.";
}
}
container route-attributes {
description
"Route attributes.";
uses route-attributes;
}
container route-vendor-attributes {
description
"Route vendor attributes.";
uses route-vendor-attributes;
}
}
grouping nexthop-list {
description
"A generic nexthop list.";
list nexthop-list {
key "nexthop-member-id";
description
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"A list of nexthop.";
leaf nexthop-member-id {
type uint32;
mandatory true;
description
"A nexthop identifier that points
to a nexthop list member.
A nexthop list member is a nexthop.";
}
}
}
grouping nexthop-list-p {
description
"A nexthop list with preference parameter.";
list nexthop-list {
key "nexthop-member-id";
description
"A list of nexthop.";
leaf nexthop-member-id {
type uint32;
mandatory true;
description
"A nexthop identifier that points
to a nexthop list member.
A nexthop list member is a nexthop.";
}
leaf nexthop-preference {
type nexthop-preference-def;
mandatory true;
description
"Nexthop-preference is used for protection schemes.
It is an integer value between 1 and 99. A lower
value indicates higher preference. To download a
primary/standby/tertiary group to the FIB, the
nexthops that are resolved and have two highest
preferences are selected.";
}
}
}
grouping nexthop-list-w {
description
"A nexthop list with weight parameter.";
list nexthop-list {
key "nexthop-member-id";
description
"A list of nexthop.";
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leaf nexthop-member-id {
type uint32;
mandatory true;
description
"A nexthop identifier that points
to a nexthop list member.
A nexthop list member is a nexthop.";
}
leaf nexthop-lb-weight {
type nexthop-lb-weight-def;
mandatory true;
description
"The weight of a nexthop of
the load balance nexthops.";
}
}
}
grouping nexthop {
description
"The nexthop structure.";
leaf nexthop-id {
type uint32;
mandatory true;
description
"The nexthop identifier of a nexthop.";
}
leaf sharing-flag {
type boolean;
mandatory true;
description
"To indicate whether a nexthop is sharable
or non-sharable.
true - sharable, means the nexthop can be shared
with other routes
false - non-sharable, means the nexthop can not
be shared with other routes.";
}
choice nexthop-type {
description
"Nexthop type options.";
case nexthop-base {
container nexthop-base {
description
"The base nexthop.";
uses nexthop-base;
}
}
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case nexthop-chain {
if-feature nexthop-chain;
container nexthop-chain {
description
"A chain nexthop.";
uses nexthop-list;
}
}
case nexthop-replicates {
if-feature nexthop-replicates;
container nexthop-replicates {
description
"A replicates nexthop.";
uses nexthop-list;
}
}
case nexthop-protection {
if-feature nexthop-protection;
container nexthop-protection {
description
"A protection nexthop.";
uses nexthop-list-p;
}
}
case nexthop-load-balance {
if-feature nexthop-load-balance;
container nexthop-lbs {
description
"A load balance nexthop.";
uses nexthop-list-w;
}
}
}
}
grouping nexthop-base {
description
"The base nexthop.";
choice nexthop-base-type {
description
"Nexthop base type options.";
case special-nexthop {
leaf special {
type special-nexthop-def;
description
"A special nexthop.";
}
}
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case egress-interface-nexthop {
leaf outgoing-interface {
type if:interface-ref;
mandatory true;
description
"The nexthop is an outgoing interface.";
}
}
case ipv4-address-nexthop {
leaf ipv4-address {
type inet:ipv4-address;
mandatory true;
description
"The nexthop is an IPv4 address.";
}
}
case ipv6-address-nexthop {
leaf ipv6-address {
type inet:ipv6-address;
mandatory true;
description
"The nexthop is an IPv6 address.";
}
}
case egress-interface-ipv4-nexthop {
container egress-interface-ipv4-address{
leaf outgoing-interface {
type if:interface-ref;
mandatory true;
description
"Name of the outgoing interface.";
}
leaf ipv4-address {
type inet:ipv4-address;
mandatory true;
description
"The nexthop points to an interface with
an IPv4 address.";
}
description
"The nexthop is an Egress-interface and an ip
address.This can be usesd in cases e.g.where
the ip address is a link-local address.";
}
}
case egress-interface-ipv6-nexthop {
container egress-interface-ipv6-address {
leaf outgoing-interface {
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type if:interface-ref;
mandatory true;
description
"Name of the outgoing interface.";
}
leaf ipv6-address {
type inet:ipv6-address;
mandatory true;
description
"The nexthop points to an interface with
an IPv6 address.";
}
description
"The nexthop is an Egress-interface and an ip
address.This can be usesd in cases e.g.where
the ip address is a link-local address.";
}
}
case egress-interface-mac-nexthop {
container egress-interface-mac-address {
leaf outgoing-interface {
type if:interface-ref;
mandatory true;
description
"Name of the outgoing interface.";
}
leaf ieee-mac-address {
type uint32;
mandatory true;
description
"The nexthop points to an interface with
a specific mac-address.";
}
description
"The egress interface must be an ethernet
interface. Address resolution is not required
for this nexthop.";
}
}
case tunnel-encap-nexthop {
if-feature nexthop-tunnel;
container tunnel-encap {
uses tunnel-encap;
description
"This can be an encap representing an IP tunnel or
MPLS tunnel or others as defined in info model.
An optional egress interface can be chained to the
tunnel encap to indicate which interface to send
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the packet out on. The egress interface is useful
when the network device contains Ethernet interfaces
and one needs to perform address resolution for the
IP packet.";
}
}
case tunnel-decap-nexthp {
if-feature nexthop-tunnel;
container tunnel-decap {
uses tunnel-decap;
description
"This is to specify decapsulating a tunnel header.";
}
}
case logical-tunnel-nexthop {
if-feature nexthop-tunnel;
container logical-tunnel {
uses logical-tunnel;
description
"This can be a MPLS LSP or a GRE tunnel (or others
as defined in This document), that is represented
by a unique identifier (e.g. name).";
}
}
case rib-name-nexthop {
leaf rib-name {
type string;
description
"A nexthop pointing to a rib indicates that the
route lookup needs to continue in The specified
rib. This is a way to perform chained lookups.";
}
}
}
}
grouping route-vendor-attributes {
description
"Route vendor attributes.";
}
grouping logical-tunnel {
description
"A logical tunnel that is identified
by a type and a tunnel name.";
leaf tunnel-type {
type tunnel-type-def;
mandatory true;
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description
"A tunnel type.";
}
leaf tunnel-name {
type string;
mandatory true;
description
"A tunnel name that points to a logical tunnel.";
}
}
grouping ipv4-header {
description
"The IPv4 header encapsulation information.";
leaf src-ipv4-address {
type inet:ipv4-address;
mandatory true;
description
"The source ip address of the header.";
}
leaf dest-ipv4-address {
type inet:ipv4-address;
mandatory true;
description
"The destination ip address of the header.";
}
leaf protocol {
type uint8;
mandatory true;
description
"The protocol id of the header.";
}
leaf ttl {
type uint8;
description
"The TTL of the header.";
}
leaf dscp {
type uint8;
description
"The DSCP field of the header.";
}
}
grouping ipv6-header {
description
"The IPv6 header encapsulation information.";
leaf src-ipv6-address {
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type inet:ipv6-address;
mandatory true;
description
"The source ip address of the header.";
}
leaf dest-ipv6-address {
type inet:ipv6-address;
mandatory true;
description
"The destination ip address of the header.";
}
leaf next-header {
type uint8;
mandatory true;
description
"The next header of the IPv6 header.";
}
leaf traffic-class {
type uint8;
description
"The traffic class value of the header.";
}
leaf flow-label {
type uint16;
description
"The flow label of the header.";
}
leaf hop-limit {
type uint8;
description
"The hop limit the header.";
}
}
grouping nvgre-header {
description
"The NvGRE header encapsulation information.";
choice nvgre-type {
description
"NvGRE can use eigher IPv4
or IPv6 header for encapsulation.";
case ipv4 {
uses ipv4-header;
}
case ipv6 {
uses ipv6-header;
}
}
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leaf virtual-subnet-id {
type uint32;
mandatory true;
description
"The subnet identifier of the NvGRE header.";
}
leaf flow-id {
type uint16;
description
"The flow identifier of the NvGRE header.";
}
}
grouping vxlan-header {
description
"The VxLAN encapsulation header information.";
choice vxlan-type {
description
"NvGRE can use eigher IPv4
or IPv6 header for encapsulation.";
case ipv4 {
uses ipv4-header;
}
case ipv6 {
uses ipv6-header;
}
}
leaf vxlan-identifier {
type uint32;
mandatory true;
description
"The VxLAN identifier of the VxLAN header.";
}
}
grouping gre-header {
description
"The GRE encapsulation header information.";
choice dest-address-type {
description
"GRE options: IPv4 and IPv6";
case ipv4 {
leaf ipv4-dest {
type inet:ipv4-address;
mandatory true;
description
"The destination ip address of the GRE header.";
}
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}
case ipv6 {
leaf ipv6-dest {
type inet:ipv6-address;
mandatory true;
description
"The destination ip address of the GRE header.";
}
}
}
leaf protocol-type {
type uint16;
mandatory true;
description
"The protocol type of the GRE header.";
}
leaf key {
type uint64;
description
"The GRE key of the GRE header.";
}
}
grouping mpls-header {
description
"The MPLS encapsulation header information.";
list label-operations {
key "label-oper-id";
description
"Label operations.";
leaf label-oper-id {
type uint32;
description
"An optional identifier that points
to a label operation.";
}
choice label-actions {
description
"Label action options.";
case label-push {
container label-push {
description
"Label push operation.";
leaf label {
type uint32;
mandatory true;
description
"The label to be pushed.";
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}
leaf s-bit {
type boolean;
description
"The s-bit of the label to be pushed. ";
}
leaf tc-value {
type uint8;
description
"The traffic class value of the label to be pushed.";
}
leaf ttl-value {
type uint8;
description
"The TTL value of the label to to be pushed.";
}
}
}
case label-swap {
container label-swap {
description
"Label swap operation.";
leaf in-label {
type uint32;
mandatory true;
description
"The label to be swapped.";
}
leaf out-label {
type uint32;
mandatory true;
description
"The out MPLS label.";
}
leaf ttl-action {
type ttl-action-def;
description
"The label ttl actions:
- No-action, or
- Copy to inner label,or
- Decrease (the in label) by 1 and
copy to the out label.";
}
}
}
}
}
}
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grouping tunnel-encap{
description
"Tunnel encapsulation inforamtion.";
choice tunnel-type {
description
"Tunnel options for next-hops.";
case ipv4 {
if-feature ipv4-tunnel;
uses ipv4-header;
}
case ipv6 {
if-feature ipv6-tunnel;
uses ipv6-header;
}
case mpls {
if-feature mpls-tunnel;
uses mpls-header;
}
case gre {
if-feature gre-tunnel;
uses gre-header;
}
case nvgre {
if-feature nvgre-tunnel;
uses nvgre-header;
}
case vxlan {
if-feature vxlan-tunnel;
uses vxlan-header;
}
}
}
grouping tunnel-decap {
description
"Tunnel decapsulation inforamtion.";
choice tunnel-type {
description
"Nexthop tunnel type options.";
case ipv4 {
if-feature ipv4-tunnel;
container ipv4-decap {
description
"IPv4 decap.";
leaf ipv4-decap {
type tunnel-decap-action-def;
mandatory true;
description
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"IPv4 decap operations.";
}
leaf ttl-action {
type ttl-action-def;
description
"The ttl actions:
no-action or copy to inner header.";
}
}
}
case ipv6 {
if-feature ipv6-tunnel;
container ipv6-decap {
description
"IPv6 decap.";
leaf ipv6-decap {
type tunnel-decap-action-def;
mandatory true;
description
"IPv6 decap operations.";
}
leaf hop-limit-action {
type hop-limit-action-def;
description
"The hop limit actions:
no-action or copy to inner header.";
}
}
}
case mpls {
if-feature mpls-tunnel;
container label-pop {
description
"MPLS decap.";
leaf label-pop {
type mpls-label-action-def;
mandatory true;
description
"Pop a label from the label stack.";
}
leaf ttl-action {
type ttl-action-def;
description
"The label ttl actions:
no-action or copy to inner label";
}
}
}
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}
}
grouping route-attributes {
description
"Route attributes.";
leaf route-preference {
type uint32;
mandatory true;
description
"ROUTE_PREFERENCE: This is a numerical value that
allows for comparing routes from different
protocols. Static configuration is also
considered a protocol for the purpose of this
field. It iss also known as administrative-distance.
The lower the value, the higher the preference.";
}
leaf local-only {
type boolean ;
mandatory true;
description
"Indicate whether the attributes is local only.";
}
container address-family-route-attributes{
description
"Address family related route attributes.";
choice route-type {
description
"Address family related route attributes.";
case ip-route-attributes {
}
case mpls-route-attributes {
}
case ethernet-route-attributes {
}
}
}
}
container routing-instance {
description
"A routing instance, in the context of
the RIB information model, is a collection
of RIBs, interfaces, and routing parameters";
leaf name {
type string;
mandatory true;
description
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"The name of the routing instance.This MUST
be unique across all routing instances in
a given network device.";
}
list interface-list {
key "name";
description
"This represents the list of interfaces associated
with this routing instance. The interface list helps
constrain the boundaries of packet forwarding.
Packets coming on these interfaces are directly
associated with the given routing instance. The
interface list contains a list of identifiers, with
each identifier uniquely identifying an interface.";
leaf name {
type if:interface-ref;
description
"A reference to the name of a network layer interface.";
}
}
leaf router-id {
type yang:dotted-quad;
description
"Router ID - 32-bit number in the form of a dotted quad.";
}
leaf lookup-limit {
type uint8;
description
"A limit on how many levels of a lookup can be performed.";
}
list rib-list {
key "name";
description
"A list of RIBs that are associated with the routing
instance.";
leaf name {
type string;
mandatory true;
description
"A reference to the name of each rib.";
}
leaf rib-family {
type rib-family-def;
mandatory true;
description
"The address family of a rib.";
}
leaf ip-rpf-check {
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type boolean;
description
"Each RIB can be optionally associated with a
ENABLE_IP_RPF_CHECK attribute that enables Reverse
path forwarding (RPF) checks on all IP routes in that
RIB. Reverse path forwarding (RPF) check is used to
prevent spoofing and limit malicious traffic.";
}
list route-list {
key "route-index";
description
"A list of routes of a rib.";
uses route;
}
}
}
/*RPC Operations*/
rpc rib-add {
description
"To add a rib to a instance";
input {
leaf rib-name {
type string;
mandatory true;
description
"A reference to the name of the rib
that is to be added.";
}
leaf rib-family {
type rib-family-def;
mandatory true;
description
"The address family of the rib.";
}
leaf ip-rpf-check {
type boolean;
description
"Each RIB can be optionally associated with a
ENABLE_IP_RPF_CHECK attribute that enables Reverse
path forwarding (RPF) checks on all IP routes in that
RIB. Reverse path forwarding (RPF) check is used to
prevent spoofing and limit malicious traffic.";
}
}
output {
leaf result {
type boolean;
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mandatory true;
description
"Return the result of the rib-add operation.
true - success;
false - failed.";
}
}
}
rpc rib-delete {
description
"To delete a rib from a routing instance.
After deleting the rib, all routes installed
in the rib will be deleted as well.";
input {
leaf rib-name {
type string;
mandatory true;
description
"A reference to the name of the rib
that is to be deleted.";
}
}
output {
leaf result {
type boolean;
mandatory true;
description
"Return the result of the rib-delete operation.
true - success;
false - failed.";
}
}
}
rpc route-add {
description
"To add a route or a list of route to a rib";
input {
leaf rib-name {
type string;
mandatory true;
description
"A reference to the name of a rib.";
}
container routes {
description
"The routes to be added to the rib.";
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list route-list {
key "route-index";
description
"The list of routes to be added.";
uses route-prefix;
container route-attributes {
uses route-attributes;
description
"Route attributes.";
}
container route-vendor-attributes {
if-feature route-vendor-attributes;
uses route-vendor-attributes;
description
"Route vendor attributes.";
}
container nexthop {
uses nexthop;
description
"Nexthop.";
}
}
}
}
output {
leaf result {
type boolean;
mandatory true;
description
"Return the result of the route-add operation.
true - success;
false - failed.";
}
}
}
rpc route-delete {
description
"To delete a route or a list of route from a rib";
input {
leaf rib-name {
type string;
mandatory true;
description
"A reference to the name of a rib.";
}
container routes {
description
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"The routes to be added to the rib.";
list route-list{
key "route-index";
description
"The list of routes to be deleted.";
uses route-prefix;
}
}
}
output {
leaf result {
type boolean ;
mandatory true;
description
"Return the result of the route-delete operation.
true - success;
false - failed.";
}
}
}
rpc route-update {
description
"To update a route or a list of route of a rib.
The inputs:
1. The match conditions, could be:
a. route prefix, or
b. route attribtes, or
c. nexthop;
2. The update parameters to be used:
a. new nexhop;
b. new route attributes;
Actions:
1. update the nexthop
2. update the route attributes
The outputs:
true - success;
false - failed.
";
input {
leaf rib-name {
type string;
mandatory true;
description
"A reference to the name of a rib.";
}
choice match-conditions {
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description
"Match options.";
case match-route-prefix {
description
"Update the routes that match route
prefix(es) condition.";
container input-routes {
description
"The matched routes to be updated.";
list route-list {
key "route-index";
description
"The list of routes to be updated.";
uses route-prefix;
choice update-actions-prefix {
description
"Update actions:
1. update the nexthop
2. update the route attributes
3. update the route-vendor-attributes.
";
case update-nexthop {
uses nexthop;
}
case update-route-attributes {
uses route-attributes;
}
case update-route-vendor-attributes {
if-feature route-vendor-attributes;
uses route-vendor-attributes;
}
}
}
}
}
case match-route-attributes {
description
"Update the routes that match the
route attributes condition.";
container input-route-attributes {
description
"The route attributes are used for matching.";
uses route-attributes;
}
choice update-actions-attributes {
description
"Update actions:
1. update the nexthop
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2. update the route attributes
3. update the route-vendor-attributes.";
case update-nexthop {
uses nexthop;
}
case update-route-attributes {
uses route-attributes;
}
case update-route-vendor-attributes {
if-feature route-vendor-attributes;
uses route-vendor-attributes;
}
}
}
case match-route-vendor-attributes {
if-feature route-vendor-attributes;
description
"Update the routes that match the
vendor attributes condition";
container input-route-vendor-attributes {
description
"The vendor route attributes are used for matching.";
uses route-vendor-attributes;
}
choice update-actions-vendor-attributes {
description
"Update actions:
1. update the nexthop
2. update the route attributes
3. update the route-vendor-attributes.";
case update-nexthop {
uses nexthop;
}
case update-route-attributes {
uses route-attributes;
}
case update-route-vendor-attributes {
uses route-vendor-attributes;
}
}
}
case match-nexthop {
description
"Update the routes that match the nexthop.";
container input-nexthop {
description
"The nexthop used for matching.";
uses nexthop;
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}
choice update-actions-nexthop {
description
"Update actions:
1. update nexthop
2. update route attributes
3. update route-vendor-attributes.";
case update-nexthop {
uses nexthop;
}
case update-route-attributes {
uses route-attributes;
}
case update-route-vendor-attributes {
if-feature route-vendor-attributes;
uses route-vendor-attributes;
}
}
}
}
}
output {
leaf result {
type boolean ;
mandatory true;
description
"Return the result of the route-update operation.
true - success;
false - failed.";
}
}
}
rpc nh-add {
description
"To add a nexthop to a rib.
Inputs parameters:
1. rib name
2. nexthop;
Actions:
Add the nexthop to the rib
Outputs:
1.Operation result:
true - success
false - failed;
2. nexthop identifier.";
input {
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leaf rib-name {
type string;
mandatory true;
description
"A reference to the name of a rib.";
}
uses nexthop;
}
output {
leaf result {
type boolean ;
mandatory true;
description
"Return the result of the nh-add operation.
true - success;
false - failed.";
}
leaf nexthop-id {
type uint32;
mandatory true;
description
"A nexthop identifer that is allocated to the nexthop.";
}
}
}
rpc nh-delete {
description
"To delete a nexthop from a rib";
input {
leaf rib-name {
type string;
mandatory true;
description
"A reference to the name of a rib.";
}
uses nexthop;
}
output {
leaf result {
type boolean ;
mandatory true;
description
"Return the result of the nh-delete operation.
true - success;
false - failed.";
}
}
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}
/*Notifications*/
notification nexthop-resolution-status-change {
description
"Nexthop resolution status (resolved/unresolved)
notification.";
container nexthop{
description
"The nexthop.";
uses nexthop;
}
leaf nexthop-state {
type nexthop-state-def;
mandatory true;
description
"Nexthop resolution status (resolved/unresolved)
notification.";
}
}
notification route-change {
description
"Route change notification.";
leaf rib-name {
type string;
mandatory true;
description
"A reference to the name of a rib.";
}
leaf rib-family {
type rib-family-def;
mandatory true;
description
"A reference to address family of a rib.";
}
uses route-prefix;
leaf route-installed-state {
type route-installed-state-def;
mandatory true;
description
"Indicates whether the route got installed in the FIB.";
}
leaf route-state {
type route-state-def;
mandatory true;
description
"Indicates whether a route is fully resolved and
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is a candidate for selection.";
}
leaf route-change-reason {
type route-reason-def;
mandatory true;
description
"Return the reason that causes the route change.";
}
}
}
//<CODE ENDS>
4. IANA Considerations
This document requests to register a URI in the "IETF XML registry"
[RFC3688]:
--------------------------------------------------------------------
URI: urn:ietf:params:xml:ns:yang:ietf-i2rs-rib
Registrant Contact: The IESG.XML:
N/A, the requested URI is an XML namespace.
--------------------------------------------------------------------
This document requests to register a YANG module in the "YANG Module
Names registry" [RFC6020]:
--------------------------------------------------------------------
name: ietf-i2rs-rib
namespace: urn:ietf:params:xml:ns:yang:ietf-i2rs-rib
prefix: iir
reference: RFC XXXX
--------------------------------------------------------------------
5. Security Considerations
This document introduces no extra new security threat and SHOULD
follow the security requirements as stated in
[I-D.ietf-i2rs-architecture].
6. Contributors
The following individuals also contribute to this document.
o Zekun He, Tencent Holdings Ltd
o Sujian Lu, Tencent Holdings Ltd
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o Jeffery Zhang, Juniper Networks
7. References
7.1. Normative References
[RFC2119] Bradner, S., "Key words for use in RFCs to Indicate
Requirement Levels", BCP 14, RFC 2119,
DOI 10.17487/RFC2119, March 1997,
<http://www.rfc-editor.org/info/rfc2119>.
[RFC3688] Mealling, M., "The IETF XML Registry", BCP 81, RFC 3688,
DOI 10.17487/RFC3688, January 2004,
<http://www.rfc-editor.org/info/rfc3688>.
[RFC6020] Bjorklund, M., Ed., "YANG - A Data Modeling Language for
the Network Configuration Protocol (NETCONF)", RFC 6020,
DOI 10.17487/RFC6020, October 2010,
<http://www.rfc-editor.org/info/rfc6020>.
[RFC6991] Schoenwaelder, J., Ed., "Common YANG Data Types",
RFC 6991, DOI 10.17487/RFC6991, July 2013,
<http://www.rfc-editor.org/info/rfc6991>.
7.2. Informative References
[I-D.ietf-i2rs-architecture]
Atlas, A., Halpern, J., Hares, S., Ward, D., and T.
Nadeau, "An Architecture for the Interface to the Routing
System", draft-ietf-i2rs-architecture-09 (work in
progress), March 2015.
[I-D.ietf-i2rs-rib-info-model]
Bahadur, N., Kini, S., and J. Medved, "Routing Information
Base Info Model", draft-ietf-i2rs-rib-info-model-08 (work
in progress), October 2015.
[I-D.ietf-i2rs-usecase-reqs-summary]
Hares, S. and M. Chen, "Summary of I2RS Use Case
Requirements", draft-ietf-i2rs-usecase-reqs-summary-01
(work in progress), May 2015.
Authors' Addresses
Lixing Wang
Individual
Email: wang_little_star@sina.com
Wang, et al. Expires May 4, 2016 [Page 60]
Internet-Draft RIB DM November 2015
Hariharan Ananthakrishnan
Packet Design
Email: hari@packetdesign.com
Mach(Guoyi) Chen
Huawei
Email: mach.chen@huawei.com
Amit Dass
Ericsson
Torshamnsgatan 48.
Stockholm 16480
Sweden
Email: amit.dass@ericsson.com
Sriganesh Kini
Ericsson
Email: sriganesh.kini@ericsson.com
Nitin Bahadur
Bracket Computing
Email: nitin_bahadur@yahoo.com
Wang, et al. Expires May 4, 2016 [Page 61]