| OPSAWG Working Group | B. Wu |
| Internet-Draft | Q. Wu |
| Intended status: Standards Track | Huawei |
| Expires: January 27, 2021 | M. Boucadair |
| Orange | |
| O. Gonzalez de Dios | |
| Telefonica | |
| B. Wen | |
| Comcast | |
| C. Liu | |
| China Unicom | |
| H. Xu | |
| China Telecom | |
| July 26, 2020 |
A YANG Model for Network and VPN Service Performance Monitoring
draft-www-opsawg-yang-vpn-service-pm-01
The data model defined in RFC8345 introduces vertical layering relationships between networks that can be augmented to cover network/service topologies. This document defines a YANG model for both Network Performance Monitoring and VPN Service Performance Monitoring that can be used to monitor and manage network performance on the topology at higher layer or the service topology between VPN sites.
This document does not define metrics for network performance or mechanisms for measuring network performance. The YANG model defined in this document is designed as an augmentation to the network topology YANG model defined in RFC 8345 and draws on relevant YANG types defined in RFC 6991, RFC 8299, RFC 8345, and RFC 8532.
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 January 27, 2021.
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 (https://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.
[RFC8345] defines a YANG data model for network/service topologies and inventories. The service topology described in [RFC8345] includes the virtual topology for a service layer above Layer 1 (L1), Layer 2 (L2), and Layer 3 (L3). This service topology has the generic topology elements of node, link, and terminating point. One typical example of a service topology is described in Figure 3 of [RFC8345]: two VPN service topologies instantiated over a common L3 topology. Each VPN service topology is mapped onto a subset of nodes from the common L3 topology.
[RFC8299] defines a YANG model for L3VPN Service Delivery. Three types of VPN service topologies are supported in [RFC8299]: "any to any", "hub and spoke", and "hub and spoke disjoint". These VPN topology types can be used to describe how VPN sites communicate with each other.
[RFC4176] provides a framework for L3VPN operations and management. Section 2.2.4 of that document describes performance management. This document defines a YANG Model for both network performance monitoring and VPN service performance monitoring that can be used to monitor and manage network performance on the topology at higher layer or the service topology between VPN sites.
This document does not define metrics for network performance or mechanisms for measuring network performance. The YANG model defined in this document is designed as an augmentation to the network topology YANG model defined in [RFC8345] and draws on relevant YANG types defined in [RFC6991], [RFC8299], [RFC8345], and [RFC8532].
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 [RFC2119][RFC8174] when, and only when, they appear in all capitals, as shown here.
Tree diagrams used in this document follow the notation defined in [RFC8340].
The module defined in this document is a Network and VPN Service assurance module that can be used to monitor and manage the network performance on the topology at higher layer or the service topology between VPN sites and it is an augmentation to the "ietf-network" and "ietf-network-topology" YANG data model [RFC8345].
The performance monitoring data is augmented to service topology as shown in Figure 1.
+----------------------+ +-----------------------+
|ietf-network | |Network and VPN Service|
|ietf-network-topology |<---------|Performance Monitoring |
+----------------------+ augments | Model |
+-----------------------+
Figure 1: Module Augmentation
The data model defined in [RFC8345] can describe vertical layering relationships between networks. That model can be augmented to cover network/service topologies.
Figure 2 illustrates an example of a topology mapping between the VPN service topology and an underlying network:
VPN-SVC 1 VPN-SVC 2
/ \
VPN-Service-topology 1 VPN-Service-topology-2
/ | \ / | \
Site-1A Site-1B Site1-C Site-2A Site-2B Site-2C Top-Down
| | | | | | Service Topology
CE CE CE CE CE CE
| | | | | |
PE PE PE PE PE PE
====|==========|=======|=======|=========|=====|======================
+-------+ | \ / / |
Bottom-up | | \ / / |
Network | | /\ / |
topology | | / \ | |
| | | | | |
node1 node2 node3 node4 node5 node6
Figure 2: Example of topology mapping between VPN Service Topo and Underlying network
As shown in Figure 2, two VPN services topologies are both built on top of one common underlying physical network:
An SP must be able to manage the capabilities and characteristics of the network/VPN services when Network connection is established or VPN sites are setup to communicate with each other.
As described in Section 4, once the mapping between the VPN Service topology and the underlying physical network has been setup, the performance monitoring data per link in the underlying network can be collected using network performance measurement method such as MPLS Loss and Delay Measurement [RFC6374].
The performance monitoring information reflecting the quality of the Network or VPN service such as end to end network performance data between source node and destination node in the network or between VPN sites can be aggregated or calculated using, for example, PCEP solution [RFC8233] [RFC7471] [RFC7810] [RFC8571] or LMAP [RFC8194].
The information can be fed into data source such as the management system or network devices. The measurement interval and report interval associated with these performance data usually depends on configuration parameters.
Some applications such as service-assurance applications, which must maintain a continuous view of operational data and state, can use subscription model [I-D.ietf-netconf-yang-push] to subscribe to the specific Network performance data or VPN service performance data they are interested in, at the data source.
The data source can then use the Network and VPN service assurance model defined in this document and the YANG Push model [I-D.ietf-netconf-yang-push] to distribute specific telemetry data to target recipients.
To obtain a snapshot of a large amount of performance data from a network element (including network controllers), service-assurance applications may use polling-based methods such as RPC model to fetch performance data on demand.
This document defines the YANG module "ietf-network-vpn-pm", which has the tree structure described in the following sub-sections.
module: ietf-network-vpn-pm
augment /nw:networks/nw:network/nw:network-types:
+--rw network-technology-type* identityref
augment /nw:networks/nw:network:
+--rw vpn-attributes
| +--rw vpn-topo? identityref
+--rw vpn-summary-statistics
| +--rw ipv4
| | +--rw total-routes? uint32
| | +--rw total-active-routes? uint32
| +--rw ipv6
| +--rw total-routes? uint32
| +--rw total-active-routes? uint32
Figure 3: Network Level View of the hierarchies
For VPN service performance monitoring, this model defines only the following minimal set of Network level network topology attributes:
For network performance monitoring, the attributes of "Network Level" that defined in [RFC8345] do not need to be extended.
augment /nw:networks/nw:network/nw:node:
+--rw node-attributes
| +--rw node-type? identityref
| +--rw site-id? string
| +--rw site-role? Identityref
Figure 4: Node Level View of the hierarchies
The Network and VPN service performance monitoring model defines only the following minimal set of Node level network topology attributes and constraints:
augment /nw:networks/nw:network/nt:link:
+--rw link-type? identityref
+--rw low-percentile percentile
+--rw high-percentile percentile
+--rw middle-percentile percentile
+--ro reference-time yang:date-and-time
+--ro measurement-interval uint32
+--ro link-telemetry-attributes
+--ro loss-statistics
| +--ro packet-loss-count? uint32
| +--ro loss-ratio? percentage
| +--ro packet-reorder-count? uint32
| +--ro packets-out-of-seq-count? uint32
| +--ro packets-dup-count? uint32
+--ro delay-statistics
| +--ro direction? identityref
| +--ro unit-value identityref
| +--ro min-delay-value? yang:gauge64
| +--ro max-delay-value? yang:gauge64
| +--ro high-delay-percentile? yang:gauge64
| +--ro middle-delay-percentile? yang:gauge64
| +--ro low-delay-percentile? yang:gauge64
+--ro jitter-statistics
+--ro unit-value identityref
+--ro min-jitter-value? yang:gauge64
+--ro max-jitter-value? yang:gauge64
+--ro low-jitter-percentile? yang:gauge64
+--ro high-jitter-percentile? yang:gauge64
+--ro middle-jitter-percentile? yang:gauge64
augment /nw:networks/nw:network/nw:node/nt:termination-point:
+--ro tp-telemetry-attributes
+--ro in-octets? uint32
+--ro out-octets? uint32
+--ro inbound-unicast? uint32
+--ro inbound-nunicast? uint32
+--ro inbound-discards? uint32
+--ro inbound-errors? uint32
+--ro in-unknown-protocol? uint32
+--ro outbound-unicast? uint32
+--ro outbound-nunicast? uint32
+--ro outbound-discards? uint32
+--ro outbound-errors? uint32
+--ro outbound-qlen? uint32
Figure 5: Link and Termination point Level View of the hierarchies
The Network and VPN service performance monitoring model defines only the following minimal set of Link level network topology attributes:
The Network and VPN service performance monitoring defines the following minimal set of Termination point level network topology attributes:
This example shows the way for a client to subscribe for the Performance monitoring information between node A and node B in the L3 network topology built on top of the underlying network . The performance monitoring parameter that the client is interested in is end to end loss attribute.
<rpc netconf:message-id="101"
xmlns:netconf="urn:ietf:params:xml:ns:netconf:base:1.0">
<establish-subscription
xmlns="urn:ietf:params:xml:ns:yang:ietf-subscribed-notifications">
<stream-subtree-filter>
<networks xmlns="urn:ietf:params:xml:ns:yang:ietf-network-topo">
<network>
<network-id>l3-network</network-id>
<network-technology-type xmlns="urn:ietf:params:xml:ns:yang:ietf-network-vpn-pm">
L3VPN
</network-technology-type>
<node>
<node-id>A</node-id>
<node-attributes xmlns="urn:ietf:params:xml:ns:yang:ietf-network-vpn-pm">
<node-type>pe</node-type>
</node-attribtues>
<termination-point xmlns="urn:ietf:params:xml:ns:yang:ietf-network-topology">
<tp-id>1-0-1</tp-id>
<tp-telemetry-attributes xmlns="urn:ietf:params:xml:ns:yang:ietf-network-vpn-pm">
<in-octets>100</in-octets>
<out-octets>150</out-octets>
</tp-telemetry-attributes>
</termination-point>
</node>
<node>
<node-id>B</node-id>
<node-attributes xmlns="urn:ietf:params:xml:ns:yang:ietf-network-vpn-pm">
<node-type>pe</node-type>
</node-attribtues>
<termination-point xmlns="urn:ietf:params:xml:ns:yang:ietf-network-topology">
<tp-id>2-0-1</tp-id>
<tp-telemetry-attributes xmlns="urn:ietf:params:xml:ns:yang:ietf-network-vpn-pm">
<in-octets>150</in-octets>
<out-octets>100</out-octets>
</tp-telemetry-attributes>
</termination-point>
</node>
<link xmlns="urn:ietf:params:xml:ns:yang:ietf-network-topology">
<link-id>A-B</link-id>
<source>
<source-node>A</source-node>
</source>
<destination>
<dest-node>B</dest-node>
</destination>
<link-type>mpls-te</link-type>
<link-telemetry-attributes
xmlns="urn:ietf:params:xml:ns:yang:ietf-network-vpn-pm">
<loss-statistics>
<packet-loss-count>100</packet-loss-count>
</loss-statistics>
</link-telemetry-attributes>
</link>
</network>
</networks>
</stream-subtree-filter>
<period xmlns="urn:ietf:params:xml:ns:yang:ietf-yang-push:1.0">500</period>
</establish-subscription>
</rpc>
This example shows the way for the client to use RPC model to fetch performance data on demand, e.g., the client requests "packet-loss-count" between PE1 in site 1 and PE2 in site 2 belonging to the same VPN1.
<rpc xmlns="urn:ietf:params:xml:ns:netconf:base:1.0"
message-id="1">
<report xmlns="urn:ietf:params:xml:ns:yang:example-service-pm-report">
<networks xmlns="urn:ietf:params:xml:ns:yang:ietf-network-topo">
<network>
<network-id>vpn1</network-id>
<node>
<node-id>A</node-id>
<node-attributes xmlns="urn:ietf:params:xml:ns:yang:ietf-network-vpn-pm">
<node-type>pe</node-type>
</node-attribtues>
<termination-point xmlns="urn:ietf:params:xml:ns:yang:ietf-network-topology">
<tp-id>1-0-1</tp-id>
<tp-telemetry-attributes xmlns="urn:ietf:params:xml:ns:yang:ietf-network-vpn-pm">
<in-octets>100</in-octets>
<out-octets>150</out-octets>
</tp-telemetry-attributes>
</termination-point>
</node>
<node>
<node-id>B</node-id>
<node-attributes xmlns="urn:ietf:params:xml:ns:yang:ietf-network-vpn-pm">
<node-type>pe</node-type>
</node-attribtues>
<termination-point xmlns="urn:ietf:params:xml:ns:yang:ietf-network-topology">
<tp-id>2-0-1</tp-id>
<tp-telemetry-attributes xmlns="urn:ietf:params:xml:ns:yang:ietf-network-vpn-pm">
<in-octets>150</in-octets>
<out-octets>100</out-octets>
</tp-telemetry-attributes>
</termination-point>
</node>
<link-id>A-B</link-id>
<source>
<source-node>A</source-node>
</source>
<destination>
<dest-node>B</dest-node>
</destination>
<link-type>mpls-te</link-type>
<telemetry-attributes xmlns="urn:ietf:params:xml:ns:yang:ietf-network-pm">
<loss-statistics>
<packet-loss-count>120</packet-loss-count>
</loss-statistics>
</telemetry-attributes>
</link>
</network>
</report>
</rpc>
This module uses types defined in [RFC8345], [RFC8299] and [RFC8532].
<CODE BEGINS> file "ietf-network-vpn-pm@2020-04-17.yang"
module ietf-network-vpn-pm {
yang-version 1.1;
namespace "urn:ietf:params:xml:ns:yang:ietf-network-vpn-pm";
prefix nvp;
import ietf-yang-types {
prefix yang;
reference "RFC 6991: Common YANG Types.";
}
import ietf-vpn-common {
prefix vpn-common;
}
import ietf-network {
prefix nw;
reference
"Section 6.1 of RFC 8345: A YANG Data Model for Network
Topologies";
}
import ietf-network-topology {
prefix nt;
reference
"Section 6.2 of RFC 8345: A YANG Data Model for Network
Topologies";
}
import ietf-lime-time-types {
prefix lime;
reference
"RFC 8532: Generic YANG Data Model for the Management of
Operations, Administration, and Maintenance (OAM) Protocols
That Use Connectionless Communications";
}
organization
"IETF BESS Working Group";
contact
"Editor: Qin Wu
<bill.wu@huawei.com>
Editor: Mohamed Boucadair
<mohamed.boucadair@orange.com>";
description
"This module defines a model for the VPN Service Performance
monitoring.
Copyright (c) 2020 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 XXXX; see
the RFC itself for full legal notices.";
revision 2019-04-17 {
description
"Initial revision.";
reference
"RFC XXXX: A YANG Model for Network and VPN Service Performance
Monitoring";
}
identity ospf {
base vpn-common:service-type;
description
"Identity for OSPF network type.";
}
identity isis {
base vpn-common:service-type;
description
"Identity for ISIS network type.";
}
identity pe {
base vpn-common:role;
description
"Identity for PE type";
}
identity ce {
base vpn-common:role;
description
"Identity for CE type";
}
identity asbr {
base vpn-common:role;
description
"Identity for ASBR type";
}
identity p {
base vpn-common:role;
description
"Identity for P type";
}
identity link-type {
base vpn-common:protocol-type;
description
"Base identity for link type, e.g.,GRE, MPLS TE, VXLAN.";
}
identity VXLAN {
base link-type;
description
"Base identity for VXLAN Tunnel.";
}
identity ip-in-ip {
base link-type;
description
"Base identity for IP in IP Tunnel.";
}
identity direction {
description
"Base Identity for measurement direction including
one way measurement and two way measurement.";
}
identity one-way {
base direction;
description
"Identity for one way measurement.";
}
identity two-way {
base direction;
description
"Identity for two way measurement.";
}
typedef percentage {
type decimal64 {
fraction-digits 5;
range "0..100";
}
description
"Percentage.";
}
typedef percentile {
type decimal64 {
fraction-digits 2;
}
description
"The nth percentile of a set of data is the
value at which n percent of the data is below it.";
}
grouping vpn-summary-statistics {
description
"VPN Statistics grouping used for network topology
augmentation.";
container vpn-summary-statistics {
description "Container for VPN summary statistics.";
container ipv4 {
leaf total-routes {
type uint32;
description
"Total routes in the RIB from all protocols.";
}
leaf total-active-routes {
type uint32;
description
"Total active routes in the RIB.";
}
description
"IPv4-specific parameters.";
}
container ipv6 {
leaf total-routes {
type uint32;
description
"Total routes in the RIB from all protocols.";
}
leaf total-active-routes {
type uint32;
description
"Total active routes in the RIB.";
}
description
"IPv6-specific parameters.";
}
}
}
grouping link-error-statistics {
description
"Grouping for per link error statistics.";
container loss-statistics {
description
"Per link loss statistics.";
leaf packet-loss-count {
type uint32 {
range "0..4294967295";
}
default "0";
description
"Total received packet drops count.
The value of count will be set to zero (0)
on creation and will thereafter increase
monotonically until it reaches a maximum value
of 2^32-1 (4294967295 decimal), when it wraps
around and starts increasing again from zero.";
}
leaf loss-ratio {
type percentage;
description
"Loss ratio of the packets. Express as percentage
of packets lost with respect to packets sent.";
}
leaf packet-reorder-count {
type uint32 {
range "0..4294967295";
}
default "0";
description
"Total received packet reordered count.
The value of count will be set to zero (0)
on creation and will thereafter increase
monotonically until it reaches a maximum value
of 2^32-1 (4294967295 decimal), when it wraps
around and starts increasing again from zero.";
}
leaf packets-out-of-seq-count {
type uint32 {
range "0..4294967295";
}
description
"Total received out of sequence count.
The value of count will be set to zero (0)
on creation and will thereafter increase
monotonically until it reaches a maximum value
of 2^32-1 (4294967295 decimal), when it wraps
around and starts increasing again from zero..";
}
leaf packets-dup-count {
type uint32 {
range "0..4294967295";
}
description
"Total received packet duplicates count.
The value of count will be set to zero (0)
on creation and will thereafter increase
monotonically until it reaches a maximum value
of 2^32-1 (4294967295 decimal), when it wraps
around and starts increasing again from zero.";
}
}
}
grouping link-delay-statistics {
description
"Grouping for per link delay statistics";
container delay-statistics {
description
"Link delay summarised information. By default,
one way measurement protocol (e.g., OWAMP) is used
to measure delay.";
leaf direction {
type identityref {
base direction;
}
default "one-way";
description
"Define measurement direction including one way
measurement and two way measurement.";
}
leaf unit-value {
type identityref {
base lime:time-unit-type;
}
default "lime:milliseconds";
description
"Time units, where the options are s, ms, ns, etc.";
}
leaf min-delay-value {
type yang:gauge64;
description
"Minimum delay value observed.";
}
leaf max-delay-value {
type yang:gauge64;
description
"Maximum delay value observed.";
}
leaf low-delay-percentile {
type yang:gauge64;
description
"Low percentile of the delay observed with
specific measurement method.";
}
leaf middle-delay-percentile {
type yang:gauge64;
description
"Middle percentile of the delay observed with
specific measurement method.";
}
leaf high-delay-percentile {
type yang:gauge64;
description
"High percentile of the delay observed with
specific measurement method.";
}
}
}
grouping link-jitter-statistics {
description
"Grouping for per link jitter statistics";
container jitter-statistics {
description
"Link jitter summarised information. By default,
jitter is measured using IP Packet Delay Variation
(IPDV).";
leaf unit-value {
type identityref {
base lime:time-unit-type;
}
default "lime:milliseconds";
description
"Time units, where the options are s, ms, ns, etc.";
}
leaf min-jitter-value {
type yang:gauge64;
description
"Minimum jitter value observed.";
}
leaf max-jitter-value {
type yang:gauge64;
description
"Maximum jitter value observed.";
}
leaf low-jitter-percentile {
type yang:gauge64;
description
"Low percentile of the jitter observed.";
}
leaf middle-jitter-percentile {
type yang:gauge64;
description
"Middle percentile of the jitter observed.";
}
leaf high-jitter-percentile {
type yang:gauge64;
description
"High percentile of the jitter observed.";
}
}
}
grouping tp-svc-telemetry {
leaf in-octets {
type uint32;
description
"The total number of octets received on the
interface, including framing characters.";
}
leaf inbound-unicast {
type uint32;
description
"Inbound unicast packets were received, and delivered
to a higher layer during the last period.";
}
leaf inbound-nunicast {
type uint32;
description
"The number of non-unicast (i.e., subnetwork-
broadcast or subnetwork-multicast) packets
delivered to a higher-layer protocol.";
}
leaf inbound-discards {
type uint32;
description
"The number of inbound packets which were chosen
to be discarded even though no errors had been
detected to prevent their being deliverable to a
higher-layer protocol.";
}
leaf inbound-errors {
type uint32;
description
"The number of inbound packets that contained
errors preventing them from being deliverable to a
higher-layer protocol.";
}
leaf outbound-errors {
type uint32;
description
"The number of outbound packets that contained
errors preventing them from being deliverable to a
higher-layer protocol.";
}
leaf in-unknown-protocol {
type uint32;
description
"The number of packets received via the interface
which were discarded because of an unknown or
unsupported protocol.";
}
leaf out-octets {
type uint32;
description
"The total number of octets transmitted out of the
interface, including framing characters.";
}
leaf outbound-unicast {
type uint32;
description
"The total number of packets that higher-level
protocols requested be transmitted to a
subnetwork-unicast address, including those that
were discarded or not sent.";
}
leaf outbound-nunicast {
type uint32;
description
"The total number of packets that higher-level
protocols requested be transmitted to a non-
unicast (i.e., a subnetwork-broadcast or
subnetwork-multicast) address, including those
that were discarded or not sent.";
}
leaf outbound-discards {
type uint32;
description
"The number of outbound packets which were chosen
to be discarded even though no errors had been
detected to prevent their being transmitted. One
possible reason for discarding such a packet could
be to free up buffer space.";
}
leaf outbound-qlen {
type uint32;
description
" Length of the queue of the interface from where
the packet is forwarded out. The queue depth could
be the current number of memory buffers used by the
queue and a packet can consume one or more memory buffers
thus constituting device-level information.";
}
description
"Grouping for interface service telemetry.";
}
augment "/nw:networks/nw:network/nw:network-types" {
description
"Augment the network-types with service topologyies types";
leaf-list network-technology-type {
type identityref {
base vpn-common:service-type;
}
description
"Identify the network technology type, e.g., L3VPN,
L2VPN, ISIS, OSPF.";
}
}
augment "/nw:networks/nw:network" {
description
"Augment the network with service topology attributes";
container vpn-topo-attributes {
leaf vpn-topology {
type identityref {
base vpn-common:vpn-topology;
}
description
"VPN service topology, e.g., hub-spoke, any-to-any,
hub-spoke-disjoint";
}
description
"Container for vpn topology attributes.";
}
uses vpn-summary-statistics;
}
augment "/nw:networks/nw:network/nw:node" {
description
"Augment the network node with overlay topology attributes";
container node-attributes {
leaf node-type {
type identityref {
base vpn-common:role;
}
description
"Node type, e.g., PE, P, ASBR.";
}
leaf site-id {
type string;
description
"Associated vpn site";
}
leaf site-role {
type identityref {
base vpn-common:role;
}
default "vpn-common:any-to-any-role";
description
"Role of the site in the VPN.";
}
description
"Container for overlay topology attributes.";
}
}
augment "/nw:networks/nw:network/nt:link" {
description
"Augment the network topology link with overlay topology attributes";
leaf link-type {
type identityref {
base link-type;
}
description
"Link type, e.g., GRE,VXLAN, IP in IP.";
}
leaf low-percentile {
type percentile;
default 10.00;
description
"Low percentile to report.Setting low-percentile into 0.00 indicates
the client is not intererested in receiving low percentile.";
}
leaf middle-percentile {
type percentile;
default 50.00;
description
"Middle percentile to report.Setting middle-percentile into 0.00 indicates
the client is not intererested in receiving middle percentile.";
}
leaf high-percentile {
type percentile;
default 90.00;
description
"High percentile to report.";
}
leaf reference-time {
type yang:date-and-time;
description
"The time that the current Measurement Interval started.Setting high-percentile
into 0.00 indicates the client is not intererested in receiving high percentile.";
}
leaf measurement-interval {
type uint32;
units "seconds";
default 60;
description
"Interval to calculate performance metric.";
}
container link-telemetry-attributes {
config false;
uses link-error-statistics;
uses link-delay-statistics;
uses link-jitter-statistics;
description
"Container for service telemetry attributes.";
}
}
augment "/nw:networks/nw:network/nw:node/nt:termination-point" {
description
"Augment the network topology termination point with vpn service attributes";
container tp-telemetry-attributes {
config false;
uses tp-svc-telemetry;
description
"Container for termination point service telemetry attributes.";
}
}
}
<CODE ENDS>
The YANG modules defined in this document MAY be accessed via the RESTCONF protocol [RFC8040] or NETCONF protocol ([RFC6241]). The lowest RESTCONF or NETCONF layer requires that the transport-layer protocol provides both data integrity and confidentiality, see Section 2 in [RFC8040] and [RFC6241]. The lowest NETCONF layer is the secure transport layer, and the mandatory-to-implement secure transport is Secure Shell (SSH)[RFC6242] . The lowest RESTCONF layer is HTTPS, and the mandatory-to-implement secure transport is TLS [RFC5246].
The NETCONF access control model [RFC6536] 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:
This document requests IANA to register the following URI in the "ns" subregistry within the "IETF XML Registry" [RFC3688]:
URI: urn:ietf:params:xml:ns:yang:ietf-network-vpn-pm Registrant Contact: The IESG. XML: N/A, the requested URI is an XML namespace.
This document requests IANA to register the following YANG module in the "YANG Module Names" subregistry [RFC6020] within the "YANG Parameters" registry.
Name: ietf-network-vpn-pm Namespace: urn:ietf:params:xml:ns:yang:ietf-network-vpn-pm Maintained by IANA: N Prefix: nvp Reference: RFC XXXX
Thanks to Adrian Farrel for reviewing this draft and providing important input to this document.
Michale Wang Huawei Email:wangzitao@huawei.com Roni Even Huawei Email: ron.even.tlv@gmail.com