Internet DRAFT - draft-hb-spring-sr-p2mp-policy-yang
draft-hb-spring-sr-p2mp-policy-yang
Network Working Group H. Bidgoli, Ed.
Internet-Draft Nokia
Intended status: Standards Track D. Voyer
Expires: May 1, 2021 Bell Canada
R. Parekh
Cisco System
T. Saad
Juniper Networks
T. Kundu
Nokia
October 28, 2020
YANG Data Model for p2mp sr policy
draft-hb-spring-sr-p2mp-policy-yang-02
Abstract
SR P2MP policies are set of policies that enable architecture for
P2MP service delivery.
This document defines a YANG data model for SR P2MP Policy
Configuration and operation.
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 https://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 1, 2021.
Copyright Notice
Copyright (c) 2020 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
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Table of Contents
1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . 2
2. Conventions used in this document . . . . . . . . . . . . . . 2
3. Design of the Data Model . . . . . . . . . . . . . . . . . . 2
4. Configuration . . . . . . . . . . . . . . . . . . . . . . . . 4
5. Yang Data Model . . . . . . . . . . . . . . . . . . . . . . . 4
6. IANA Consideration . . . . . . . . . . . . . . . . . . . . . 14
7. Security Considerations . . . . . . . . . . . . . . . . . . . 14
8. Acknowledgments . . . . . . . . . . . . . . . . . . . . . . . 14
9. References . . . . . . . . . . . . . . . . . . . . . . . . . 14
9.1. Normative References . . . . . . . . . . . . . . . . . . 14
9.2. Informative References . . . . . . . . . . . . . . . . . 14
Authors' Addresses . . . . . . . . . . . . . . . . . . . . . . . 15
1. Introduction
This document defines a YANG data model for P2MP SR Policy
configuration and operation.
2. Conventions used in this document
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].
3. Design of the Data Model
submodule: router-p2mp-traffic-engineering (belongs-to root)
+--rw p2mp-traffic-engiineering!
+--rw p2mp-policy* [root-address tree-id]
| +--rw root-address inet:ip-address
| +--rw tree-id uint32
| +--rw p2mp-policy-name? string
| +--rw admin-state? enumeration
| +--ro oper-state? enumeration
| +--rw leaf-list* [leaf-address]
| | +--rw leaf-address inet:ip-address
| | +--rw admin-state? enumeration
| +--rw candidate-path* [protocol-id originator discriminator]
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| +--rw protocol-id enumeration
| +--rw originator inet:ip-address
| +--rw discriminator uint32
| +--rw candidate-path-name? string
| +--rw admin-state? enumeration
| +--ro oper-state? enumeration
| +--rw preference? uint32
| +--rw constraints* [index]
| | +--rw index uint32
| | +--rw attributes? uint32
| +--rw explicit-routing* [index]
| | +--rw index uint32
| | +--rw attributes? uint32
| +--rw path-instances* [index]
| +--rw index uint32
| +--rw instance-id? -> ../../../../replication-segment
/replication-id
| +--ro oper-state? enumeration
+--rw replication-segment* [node-address replication-id]
+--rw node-address inet:ipv4-address
+--rw replication-id uint32
+--rw admin-state? enumeration
+--ro oper-state? enumeration
+--rw root-address? inet:ipv4-address
+--rw tree-id? uint32
+--rw instance-id? uint32
+--rw replication-sid? uint32
+--rw downstream-nodes* [downstream-index]
+--rw downstream-index uint32
+--rw next-hop-address? inet:ip-address
+--rw next-hop-interface-name? if:interface-ref
+--rw protecting-next-hop? boolean
+--rw protect-nexthop-id? uint32
+--rw (label)?
+--:(sid-list)
| +--rw sid-list* [index]
| +--rw index uint32
| +--rw sid-segment-type? uint32
+--:(sr-policy)
| +--rw sr-policy* [replication-sid]
| +--rw replication-sid uint32
| +--rw sr-policy? string
+--:(rsvp-te)
+--rw rsvp-te* [replication-sid]
+--rw replication-sid uint32
+--rw rsvp-te-tunnel-id? uint32
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4. Configuration
This Module augments the "/rt:routing:" with a treeSID container.
This container defines all the configuration parameter related to
treeSID and P2MP SR Policy for this particular routing. The P2MP SR
policy contains replication policy which in order contain candidate-
path and the next-hop-groups for each OIF in the replication Policy.
IT should be noted that two disjoint replication policies can be
connected via a SR Policy as per
[draft-ietf-spring-sr-replication-segment].
5. Yang Data Model
<CODE BEGINS> file "ietf-p2mp-policy-@2019-07-04.yang"
module ietf-tree-sid {
yang-version 1.1;
namespace "urn:ietf:params:xml:ns:yang:p2mp-policy-segment";
// replace with IANA namespace when assigned
prefix tree-sid;
import ietf-inet-types {
prefix "inet";
}
import ietf-yang-types {
prefix "yang";
}
import ietf-routing-types {
prefix "rt-types";
}
import ietf-routing {
prefix "rt";
}
import ietf-interfaces {
prefix "if";
}
import ietf-ip {
prefix ip;
}
organization
"IETF SPRING Working Group";
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contact
"WG Web: <http://tools.ietf.org/wg/spring/>
WG List: <mailto:spring@ietf.org>
WG Chair: Bruno Decraene
<mailto:bruno.decraene@orange.com>
WG Chair: Rob Shakir
<mailto:robjs@google.com>
Editor: Hooman Bidgoli
<mailto:hooman.bidgoli@nokia.com>
Editor: Tanmoy Kundu
<mailto:tanmoy.kundu@nokia.com>
Editor: Daniel Voyer
<mainlto: daniel.voyer@bell.com>
description
"The module defines a collection of YANG definition for
p2mp policy module.";
revision 2019-10-30 {
description
"First draft.";
reference
"RFC XXXX: A YANG Data Model for TREE-SID";
}
submodule router-p2mp-traffic-engineering {
belongs-to root { prefix "root"; }
import ietf-inet-types { prefix "inet"; }
import ietf-interfaces { prefix "if"; }
container p2mp-traffic-engineering {
presence "Configure Tree SID P2PM segment parameters.";
description
"Create p2mp policies and their corresponding
candidate paths for p2mp trees.";
list p2mp-policy {
key "root-address tree-id";
uses p2mp-policy-key;
description
"Each p2mp-policy identifies one or more p2mp
LSP for on the root towards a set of leaf/leaves.";
unique "p2mp-policy-name";
leaf p2mp-policy-name {
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type string;
description
"P2MP policy name to be referenced by mvpn pmsi.";
}
leaf admin-state {
type enumeration{
enum down { value 0; }
enum up { value 1; }
}
default down;
description
"Administratively enable/disable Tree SID p2mp policy.";
}
leaf oper-state {
type enumeration{
enum down { value 0; }
enum up { value 1; }
}
default down;
config false;
description
"Tree SID p2mp policy operational state based on users.";
}
list leaf-list {
key "leaf-address";
uses leaf-list-key;
description
"This list consists of one or more endpoint/s
for a p2mp-segment.";
leaf admin-state {
type enumeration{
enum down { value 0; }
enum up { value 1; }
}
default down;
description
"Administratively enable/disable
each leaf/endpoint";
}
}
list candidate-path {
description
"Candidate path is p2mp tree representing a
unique path from root to a specific
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endpoint using the tree-id constraint.";
key "protocol-id originator discriminator";
uses candidate-path-key;
leaf candidate-path-name {
type string;
description
"A candidate path name
equivalent to a PLSP";
} leaf admin-state {
type enumeration{
enum down { value 0; }
enum up { value 1; }
}
default down;
description
"Administratively enable/disable Tree
SID candidate path.";
}
leaf oper-state {
type enumeration{
enum down { value 0; }
enum up { value 1; }
}
default down;
config false;
description
"candidate-path operational state based
on ilm programming.";
}
leaf preference {
type uint32;
default 100;
description
"Preference determines the best preferred
candidate-path among list of candidate path
towards a leaf. Higher preference is
chosen.";
}
list constraints {
description
"Set of constraints";
key "index";
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leaf index {
type uint32;
description
"Key index";
}
leaf attributes {
type uint32;
description
"Hooman to fill this, I am not sure";
}
}
list explicit-routing {
description
"Set of explicit routing";
key "index";
leaf index {
type uint32;
description
"Key index";
}
leaf attributes {
type uint32;
description
"Hooman to fill this, I am not sure";
}
}
list path-instances {
description
"Set of calculated path
given the constraints
and explicit routing per
candidate path";
key "index";
leaf index {
type uint32;
description
"Key index";
}
leaf instance-id {
type leafref {
path "../../../../replication-segment/replication-id";
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}
}
leaf oper-state {
type enumeration{
enum down { value 0; }
enum up { value 1; }
}
default down;
config false;
description
"Operational state of this replication segment.";
}
}
}
}
list replication-segment {
description
"A replication segment specifies the forwarding
information for one path-instance in a
candidate path.";
key "node-address replication-id";
uses replication-segment-key;
leaf admin-state {
type enumeration{
enum down { value 0; }
enum up { value 1; }
}
default down;
description
"Administratively enable/disable Tree SID replication segment.";
}
leaf oper-state {
type enumeration{
enum down { value 0; }
enum up { value 1; }
}
default down;
config false;
description
"Replication segment operational
state based on SID programming.";
}
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container service-info {
leaf root-address {
type inet:ipv4-address;
description
"Root address of the tree.";
}
leaf tree-id {
type uint32;
description
"Tree ID uniquely identifies a tunnel in the root,
this also represent a specific constraint. Also known as
color and/or p2mp-id";
}
leaf instance-id {
type uint32;
description
"Each LSP instance within a root, tree-id.";
}
}
leaf replication-sid {
type uint32;
description
"incoming sid to identify this
replication segment. Either
BSID or MPLS label";
}
list downstream-nodes {
description
"Identifies each nexthop in a candidate path.";
key "downstream-index";
uses downstream-key;
leaf next-hop-address {
type inet:ip-address;
description
"Nexthop address of the destination.";
}
leaf next-hop-interface-name {
type if:interface-ref;
description
"Next hop out going interface.";
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}
leaf protecting-next-hop {
type boolean;
default false;
description
"True if this is a protect nexthop.";
}
leaf protect-nexthop-id {
type uint32;
description
"Nexthop protection id.";
}
choice label {
list sid-list {
key index;
uses sid-list-key;
description
"Out going label for this nexthop.";
leaf sid-segment-type {
type uint32;
description
"as defined in draft-ietf-spring-segment-routing-policy section 4
note if 2 replication segments are directly connected then
they can be steered via adjacency SID or IP Nexthop";
}
}
list sr-policy {
key replication-sid;
uses sr-policy-key;
description
"sr-policy sid for this nexthop.";
leaf sr-policy {
type string;
description
"SR policy name to be referrenced by outloing label";
}
}
list rsvp-te {
key replication-sid;
uses sr-policy-key;
description
"RSVP TE Tunnel for this nexthop.";
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leaf rsvp-te-tunnel-id {
type uint32;
description
"rsvp-te-tunnel-id";
}
}
}
}
}
}
// -------------------------- GROUPINGS ---------------------------
grouping p2mp-policy-key {
leaf root-address {
type inet:ip-address;
description
"Root address of the tree.";
}
leaf tree-id {
type uint32;
description
"Tree ID uniquely indentifies a tunnel in the root,
this also represent a spefic constraint. Also known as
color and/or p2mp-id";
}
}
grouping leaf-list-key {
leaf leaf-address{
type inet:ip-address;
description
"leaf address of the this p2mp-tree";
}
}
grouping candidate-path-key {
leaf protocol-id {
type enumeration {
enum pcep { value 10; }
enum bgp-sr-policy { value 20; }
enum configuration { value 30; }
}
description
"Protocol-Origin of a candidate path is an 8-bit value
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which identifies the component or protocol that originates
or signals the candidate path.";
}
leaf originator {
type inet:ip-address;
description
"128 bit value, IPv4 address are encoded in lower 32 bit.";
}
leaf discriminator {
type uint32;
description
"The Discriminator is a 32 bit value associated
with a candidate path that uniquely identifies
it within the context of an SR Policy from a
specific Protocol-Origin";
}
}
grouping replication-segment-key {
leaf node-address {
type inet:ipv4-address;
description
"Node address for which this replication policy is used.";
}
leaf replication-id {
type uint32;
description
"Each LSP per candidate path.";
}
}
grouping downstream-key {
leaf downstream-index {
type uint32;
description
"Nexthop group or downstream replication node index";
}
}
grouping sid-list-key {
leaf index {
type uint32 {
range 1..2;
}
}
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}
grouping sr-policy-key {
leaf replication-sid {
type uint32 {
range 1..12;
}
description
"Index for push-label.";
}
}
}
6. IANA Consideration
None
7. Security Considerations
TBD
8. Acknowledgments
9. References
9.1. 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,
<https://www.rfc-editor.org/info/rfc2119>.
9.2. Informative References
[draft-ietf-pim-sr-p2mp-policy]
"D. Yoyer, C. Filsfils, R.Prekh, H.bidgoli, Z. Zhang,
"draft-voyer-pim-sr-p2mp-policy"", October 2019.
[draft-ietf-spring-segment-routing-policy]
.
[draft-ietf-spring-sr-replication-segment]
"D. Yoyer, C. Filsfils, R.Prekh, H.bidgoli, Z. Zhang,
"draft-voyer-pim-sr-p2mp-policy "draft-voyer-spring-sr-
replication-segment"", July 2020.
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Authors' Addresses
Hooman Bidgoli (editor)
Nokia
Ottawa
Canada
Email: hooman.bidgoli@nokia.com
Daniel Voyer
Bell Canada
Montreal
Canada
Email: daniel.yover@bell.ca
Rishabh Parekh
Cisco System
San Jose
USA
Email: riparekh@cisco.com
Tarek Saad
Juniper Networks
Ottawa
Canada
Email: tsaad@juniper.com
Tanmoy Kundu
Nokia
Mountain View
US
Email: tanmoy.kundu@nokia.com
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