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draft-ietf-pce-pcep-yang-10.txt
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PCE Working Group D. Dhody, Ed.
Internet-Draft Huawei Technologies
Intended status: Standards Track J. Hardwick
Expires: September 25, 2019 Metaswitch
V. Beeram
Juniper Networks
J. Tantsura
March 24, 2019
A YANG Data Model for Path Computation Element Communications Protocol
(PCEP)
draft-ietf-pce-pcep-yang-10
Abstract
This document defines a YANG data model for the management of Path
Computation Element communications Protocol (PCEP) for communications
between a Path Computation Client (PCC) and a Path Computation
Element (PCE), or between two PCEs. The data model includes
configuration and state data.
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 September 25, 2019.
Copyright Notice
Copyright (c) 2019 IETF Trust and the persons identified as the
document authors. All rights reserved.
This document is subject to BCP 78 and the IETF Trust's Legal
Provisions Relating to IETF Documents
(https://trustee.ietf.org/license-info) in effect on the date of
publication of this document. Please review these documents
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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
2. Requirements Language . . . . . . . . . . . . . . . . . . . . 3
3. Terminology and Notation . . . . . . . . . . . . . . . . . . 3
3.1. Tree Diagrams . . . . . . . . . . . . . . . . . . . . . . 4
3.2. Prefixes in Data Node Names . . . . . . . . . . . . . . . 5
3.3. Refrences in the Model . . . . . . . . . . . . . . . . . 5
4. Objectives . . . . . . . . . . . . . . . . . . . . . . . . . 7
5. The Design of PCEP Data Model . . . . . . . . . . . . . . . . 8
5.1. The Overview of PCEP Data Model . . . . . . . . . . . . . 8
5.2. The Entity . . . . . . . . . . . . . . . . . . . . . . . 9
5.3. The Peer Lists . . . . . . . . . . . . . . . . . . . . . 9
5.4. The Session Lists . . . . . . . . . . . . . . . . . . . . 10
5.5. Notifications . . . . . . . . . . . . . . . . . . . . . . 10
5.6. RPC . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
5.7. The Full PCEP Data Model . . . . . . . . . . . . . . . . 11
6. The Design of PCEP Statistics Data Model . . . . . . . . . . 17
7. Advanced PCE Features . . . . . . . . . . . . . . . . . . . . 20
7.1. Stateful PCE's LSP-DB . . . . . . . . . . . . . . . . . . 20
8. Open Issues and Next Step . . . . . . . . . . . . . . . . . . 21
8.1. The PCE-Initiated LSP . . . . . . . . . . . . . . . . . . 21
9. Other Considerations . . . . . . . . . . . . . . . . . . . . 21
9.1. PCEP over TLS (PCEPS) . . . . . . . . . . . . . . . . . . 21
10. PCEP YANG Modules . . . . . . . . . . . . . . . . . . . . . . 21
10.1. ietf-pcep module . . . . . . . . . . . . . . . . . . . . 21
10.2. ietf-pcep-stats module . . . . . . . . . . . . . . . . . 78
11. Security Considerations . . . . . . . . . . . . . . . . . . . 98
12. IANA Considerations . . . . . . . . . . . . . . . . . . . . . 99
13. Acknowledgements . . . . . . . . . . . . . . . . . . . . . . 99
14. References . . . . . . . . . . . . . . . . . . . . . . . . . 99
14.1. Normative References . . . . . . . . . . . . . . . . . . 99
14.2. Informative References . . . . . . . . . . . . . . . . . 103
Appendix A. Example . . . . . . . . . . . . . . . . . . . . . . 104
Appendix B. Contributor Addresses . . . . . . . . . . . . . . . 107
Authors' Addresses . . . . . . . . . . . . . . . . . . . . . . . 108
1. Introduction
The Path Computation Element (PCE) defined in [RFC4655] is an entity
that is capable of computing a network path or route based on a
network graph, and applying computational constraints. A Path
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Computation Client (PCC) may make requests to a PCE for paths to be
computed.
PCEP is the communication protocol between a PCC and PCE and is
defined in [RFC5440]. PCEP interactions include path computation
requests and path computation replies as well as notifications of
specific states related to the use of a PCE in the context of
Multiprotocol Label Switching (MPLS) and Generalized MPLS (GMPLS)
Traffic Engineering (TE). [RFC8231] specifies extensions to PCEP to
enable stateful control of MPLS TE LSPs.
This document defines a YANG [RFC7950] data model for the management
of PCEP speakers. It is important to establish a common data model
for how PCEP speakers are identified, configured, and monitored. The
data model includes configuration data and state data.
This document contains a specification of the PCEP YANG module,
"ietf-pcep" which provides the PCEP [RFC5440] data model.
The PCEP operational state is included in the same tree as the PCEP
configuration consistent with Network Management Datastore
Architecture [RFC8342]. The origin of the data is indicated as per
the origin metadata annotation.
2. Requirements Language
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.
3. Terminology and Notation
This document uses the terminology defined in [RFC4655] and
[RFC5440]. In particular, it uses the following acronyms.
o Path Computation Request message (PCReq).
o Path Computation Reply message (PCRep).
o Notification message (PCNtf).
o Error message (PCErr).
o Request Parameters object (RP).
o Synchronization Vector object (SVEC).
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o Explicit Route object (ERO).
This document also uses the following terms defined in [RFC7420]:
o PCEP entity: a local PCEP speaker.
o PCEP peer: to refer to a remote PCEP speaker.
o PCEP speaker: where it is not necessary to distinguish between
local and remote.
Further, this document also uses the following terms defined in
[RFC8231] :
o Stateful PCE, Passive Stateful PCE, Active Stateful PCE
o Delegation, Revocation, Redelegation
o LSP State Report, Path Computation Report message (PCRpt).
o LSP State Update, Path Computation Update message (PCUpd).
[RFC8281] :
o PCE-initiated LSP, Path Computation LSP Initiate Message
(PCInitiate).
[RFC8408] :
o Path Setup Type (PST).
[I-D.ietf-pce-segment-routing] :
o Segment Routing (SR).
[RFC6241] :
o Configuration data.
o State data.
3.1. Tree Diagrams
A simplified graphical representation of the data model is used in
this document. The meaning of the symbols in these diagrams is
defined in [RFC8340].
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3.2. Prefixes in Data Node Names
In this document, names of data nodes and other data model objects
are often used without a prefix, as long as it is clear from the
context in which YANG module each name is defined. Otherwise, names
are prefixed using the standard prefix associated with the
corresponding YANG module, as shown in Table 1.
+-----------+-----------------+-------------------------------------+
| Prefix | YANG module | Reference |
+-----------+-----------------+-------------------------------------+
| yang | ietf-yang-types | [RFC6991] |
| inet | ietf-inet-types | [RFC6991] |
| te | ietf-te | [I-D.ietf-teas-yang-te] |
| te-types | ietf-te-types | [I-D.ietf-teas-yang-te] |
| key-chain | ietf-key-chain | [RFC8177] |
| nacm | ietf-netconf- | [RFC8341] |
| | acm | |
| tls- | ietf-tls-server | [I-D.ietf-netconf-tls-client-server |
| server | | ] |
| tls- | ietf-tls-client | [I-D.ietf-netconf-tls-client-server |
| client | | ] |
| ospf | ietf-ospf | [I-D.ietf-ospf-yang] |
| isis | ietf-isis | [I-D.ietf-isis-yang-isis-cfg] |
+-----------+-----------------+-------------------------------------+
Table 1: Prefixes and corresponding YANG modules
3.3. Refrences in the Model
Following documents are refrenced in the model defined in this
document -
+----------------------------+--------------------------------------+
| Documents | Reference |
+----------------------------+--------------------------------------+
| RSVP-TE: Extensions to | [RFC3209] |
| RSVP for LSP Tunnels | |
| OSPF Protocol Extensions | [RFC5088] |
| for Path Computation | |
| Element (PCE) Discovery | |
| IS-IS Protocol Extensions | [RFC5089] |
| for Path Computation | |
| Element (PCE) Discovery | |
| Path Computation Element | [RFC5440] |
| (PCE) Communication | |
| Protocol (PCEP) | |
| Preserving Topology | [RFC5520] |
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| Confidentiality in Inter- | |
| Domain Path Computation | |
| Using a Path-Key-Based | |
| Mechanism | |
| Encoding of Objective | [RFC5541] |
| Functions in the Path | |
| Computation Element | |
| Communication Protocol | |
| (PCEP) | |
| Path Computation Element | [RFC5557] |
| Communication Protocol | |
| (PCEP) Requirements and | |
| Protocol Extensions in | |
| Support of Global | |
| Concurrent Optimization | |
| Common YANG Data Types | [RFC6991] |
| YANG Data Model for Key | [RFC8177] |
| Chains | |
| Path Computation Element | [RFC8231] |
| Communication Protocol | |
| (PCEP) Extensions for | |
| Stateful PCE | |
| Optimizations of Label | [RFC8232] |
| Switched Path State | |
| Synchronization Procedures | |
| for a Stateful PCE | |
| PCEPS: Usage of TLS to | [RFC8253] |
| Provide a Secure Transport | |
| for the Path Computation | |
| Element Communication | |
| Protocol (PCEP) | |
| Path Computation Element | [RFC8281] |
| Communication Protocol | |
| (PCEP) Extensions for PCE- | |
| Initiated LSP Setup in a | |
| Stateful PCE Model | |
| Extensions to the Path | [RFC8306] |
| Computation Element | |
| Communication Protocol | |
| (PCEP) for Point-to- | |
| Multipoint Traffic | |
| Engineering Label Switched | |
| Paths | |
| Network Configuration | [RFC8341] |
| Access Control Model | |
| Conveying Path Setup Type | [RFC8408] |
| in PCE Communication | |
| Protocol (PCEP) Messages | |
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| Traffic Engineering Common | [I-D.ietf-teas-yang-te-types] |
| YANG Types | |
| A YANG Data Model for | [I-D.ietf-teas-yang-te] |
| Traffic Engineering | |
| Tunnels and Interfaces | |
| YANG Groupings for TLS | [I-D.ietf-netconf-tls-client-server] |
| Clients and TLS Servers | |
| PCEP Extensions for | [I-D.ietf-pce-segment-routing] |
| Segment Routing | |
| PCEP Extensions for | [I-D.ietf-pce-association-group] |
| Establishing Relationships | |
| Between Sets of LSPs | |
| YANG Data Model for OSPF | [I-D.ietf-ospf-yang] |
| Protocol | |
| YANG Data Model for IS-IS | [I-D.ietf-isis-yang-isis-cfg] |
| Protocol | |
| PCEP extensions for GMPLS | [I-D.ietf-pce-gmpls-pcep-extensions] |
+----------------------------+--------------------------------------+
Table 2: Refrences in the YANG modules
4. Objectives
This section describes some of the design objectives for the model:
o In case of existing implementations, it needs to map the data
model defined in this document to their proprietary native data
model. To facilitate such mappings, the data model should be
simple.
o The data model should be suitable for new implementations to use
as is.
o Mapping to the PCEP MIB Module should be clear.
o The data model should allow for static configurations of peers.
o The data model should include read-only counters in order to
gather statistics for sent and received PCEP messages, received
messages with errors, and messages that could not be sent due to
errors. This could be in a separate model which augments the base
data model.
o It should be fairly straightforward to augment the base data model
for advanced PCE features.
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5. The Design of PCEP Data Model
5.1. The Overview of PCEP Data Model
The PCEP YANG module defined in this document has all the common
building blocks for the PCEP protocol.
module: ietf-pcep
+--rw pcep!
+--rw entity
+--rw addr inet:ip-address
+--rw enabled? boolean
+--rw role pcep-role
+--rw description? string
+--rw speaker-entity-id? string
| {stateful-sync-opt}?
+--rw admin-status? pcep-admin-status
+--ro index? uint32
+--ro oper-status? pcep-oper-status
+--rw domain
| +--rw domain* [domain-type domain]
| ...
+--rw capability
| ...
+--rw pce-info
| +--rw scope
| | ...
| +--rw neigh-domains
| | ...
| +--rw path-key {path-key}?
| ...
+--ro lsp-db {stateful}?
| +--ro db-ver? uint64
| | {stateful-sync-opt}?
| +--ro association-list*
| | [id source global-source extended-id]
| | ...
| +--ro lsp* [plsp-id pcc-id]
| ...
+--ro path-keys {path-key}?
| +--ro path-keys* [path-key]
| ...
+--rw peers
+--rw peer* [addr]
+--ro sessions
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+--ro session* [initiator]
...
rpcs:
+---x trigger-resync {stateful,stateful-sync-opt}?
+---w input
+---w pcc? -> /pcep/entity/peers/peer/addr
notifications:
+---n pcep-session-up
| ...
+---n pcep-session-down
| ...
+---n pcep-session-local-overload
| ...
+---n pcep-session-local-overload-clear
| ...
+---n pcep-session-peer-overload
| ...
+---n pcep-session-peer-overload-clear
...
5.2. The Entity
The PCEP yang module may contain status information for the local
PCEP entity.
The entity has an IP address (using ietf-inet-types [RFC6991]) and a
"role" leaf (the local entity PCEP role) as mandatory.
Note that, the PCEP MIB module [RFC7420] uses an entity list and a
system generated entity index as a primary index to the read only
entity table. If the device implements the PCEP MIB, the "index"
leaf MUST contain the value of the corresponding pcePcepEntityIndex
and only one entity is assumed.
5.3. The Peer Lists
The peer list contains peer(s) that the local PCEP entity knows
about. A PCEP speaker is identified by its IP address. If there is
a PCEP speaker in the network that uses multiple IP addresses then it
looks like multiple distinct peers to the other PCEP speakers in the
network.
Since PCEP sessions can be ephemeral, the peer list tracks a peer
even when no PCEP session currently exists to that peer. The
statistics contained are an aggregate of the statistics for all
successive sessions to that peer.
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To limit the quantity of information that is stored, an
implementation MAY choose to discard this information if and only if
no PCEP session exists to the corresponding peer.
The data model for PCEP peer presented in this document uses a flat
list of peers. Each peer in the list is identified by its IP address
(addr-type, addr).
There is a list for static peer configuration and operational state
of all peers (i.e.static as well as discovered)("/pcep/entity/
peers"). The list is used to enable remote PCE configuration at PCC
(or PCE) and has the operational state of these peers as well as the
remote PCE peer which were discovered and PCC peers that have
initiated session.
5.4. The Session Lists
The session list contains PCEP session that the PCEP entity (PCE or
PCC) is currently participating in. The statistics in session are
semantically different from those in peer since the former applies to
the current session only, whereas the latter is the aggregate for all
sessions that have existed to that peer.
Although [RFC5440] forbids more than one active PCEP session between
a given pair of PCEP entities at any given time, there is a window
during session establishment where two sessions may exist for a given
pair, one representing a session initiated by the local PCEP entity
and the other representing a session initiated by the peer. If
either of these sessions reaches active state first, then the other
is discarded.
The data model for PCEP session presented in this document uses a
flat list of sessions. Each session in the list is identified by its
initiator. This index allows two sessions to exist transiently for a
given peer, as discussed above.
5.5. Notifications
This YANG model defines a list of notifications to inform client of
important events detected during the protocol operation. The
notifications defined cover the PCEP MIB notifications.
5.6. RPC
This YANG model defines a RPC to trigger state resynchronization to a
particular PCEP peer.
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5.7. The Full PCEP Data Model
The module, "ietf-pcep", defines the basic components of a PCE
speaker. The tree depth in the tree is set to 10.
module: ietf-pcep
+--rw pcep!
+--rw entity
+--rw addr inet:ip-address
+--rw enabled? boolean
+--rw role pcep-role
+--rw description? string
+--rw speaker-entity-id? string {sync-opt}?
+--rw admin-status? boolean
+--ro index? uint32
+--ro oper-status? pcep-oper-status
+--rw domain
| +--rw domain* [domain-type domain]
| +--rw domain-type domain-type
| +--rw domain domain
+--rw capability
| +--rw capability? bits
| +--rw pce-initiated? boolean {pce-initiated}?
| +--rw include-db-ver? boolean
| | {stateful,sync-opt}?
| +--rw trigger-resync? boolean
| | {stateful,sync-opt}?
| +--rw trigger-initial-sync? boolean
| | {stateful,sync-opt}?
| +--rw incremental-sync? boolean
| | {stateful,sync-opt}?
| +--rw sr {sr}?
| +--rw enabled? boolean
| +--rw msd-limit? boolean
| +--rw nai? boolean
+--rw msd? uint8 {sr}?
+--rw pce-info
| +--rw scope
| | +--rw path-scope? bits
| | +--rw intra-area-pref? uint8
| | +--rw inter-area-pref? uint8
| | +--rw inter-as-pref? uint8
| | +--rw inter-layer-pref? uint8
| +--rw neigh-domains
| | +--rw domain* [domain-type domain]
| | +--rw domain-type domain-type
| | +--rw domain domain
| +--rw path-key {path-key}?
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| +--rw enabled? boolean
| +--rw discard-timer? uint32
| +--rw reuse-time? uint32
| +--rw pce-id? inet:ip-address
+--rw connect-timer? uint16
+--rw connect-max-retry? uint32
+--rw init-backoff-timer? uint16
+--rw max-backoff-timer? uint32
+--rw open-wait-timer? uint16
+--rw keep-wait-timer? uint16
+--rw keep-alive-timer? uint8
+--rw dead-timer? uint8
+--rw allow-negotiation? boolean
+--rw max-keep-alive-timer? uint8
+--rw max-dead-timer? uint8
+--rw min-keep-alive-timer? uint8
+--rw min-dead-timer? uint8
+--rw sync-timer? uint16 {svec}?
+--rw request-timer? uint16
+--rw max-sessions? uint32
+--rw max-unknown-reqs? uint32
+--rw max-unknown-msgs? uint32
+--rw pcep-notification-max-rate uint32
+--rw stateful-parameter {stateful}?
| +--rw state-timeout? uint32
| +--rw redelegation-timeout? uint32
| +--rw rpt-non-pcep-lsp? boolean
+--rw of-list {objective-function}?
| +--rw objective-function* [of]
| +--rw of identityref
+--ro lsp-db {stateful}?
| +--ro db-ver? uint64 {sync-opt}?
| +--ro association-list*
| | [type id source global-source extended-id]
| | {association}?
| | +--ro type identityref
| | +--ro id uint16
| | +--ro source inet:ip-address
| | +--ro global-source uint32
| | +--ro extended-id string
| | +--ro lsp* [plsp-id pcc-id]
| | +--ro plsp-id -> /pcep/entity/lsp-db/lsp/plsp-id
| | +--ro pcc-id -> /pcep/entity/lsp-db/lsp/pcc-id
| +--ro lsp* [plsp-id pcc-id]
| +--ro plsp-id uint32
| +--ro pcc-id inet:ip-address
| +--ro lsp-ref
| | +--ro source?
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| | | -> /te:te/lsps-state/lsp/source
| | +--ro destination?
| | | -> /te:te/lsps-state/lsp/destination
| | +--ro tunnel-id?
| | | -> /te:te/lsps-state/lsp/tunnel-id
| | +--ro lsp-id?
| | | -> /te:te/lsps-state/lsp/lsp-id
| | +--ro extended-tunnel-id? leafref
| +--ro admin-state? boolean
| +--ro operational-state? operational-state
| +--ro delegated
| | +--ro enabled? boolean
| | +--ro peer? -> /pcep/entity/peers/peer/addr
| | +--ro srp-id? uint32
| +--ro initiation {pce-initiated}?
| | +--ro enabled? boolean
| | +--ro peer? -> /pcep/entity/peers/peer/addr
| +--ro symbolic-path-name? string
| +--ro last-error? identityref
| +--ro pst? identityref
| +--ro association-list*
| [type id source global-source extended-id]
| {association}?
| +--ro type leafref
| +--ro id
| | -> /pcep/entity/lsp-db/association-list/id
| +--ro source leafref
| +--ro global-source leafref
| +--ro extended-id leafref
+--ro path-keys {path-key}?
| +--ro path-keys* [path-key]
| +--ro path-key uint16
| +--ro cps
| | +--ro explicit-route-objects* [index]
| | +--ro index uint32
| | +--ro (type)?
| | +--:(numbered-node-hop)
| | | +--ro numbered-node-hop
| | | +--ro node-id te-node-id
| | | +--ro hop-type? te-hop-type
| | +--:(numbered-link-hop)
| | | +--ro numbered-link-hop
| | | +--ro link-tp-id te-tp-id
| | | +--ro hop-type? te-hop-type
| | | +--ro direction? te-link-direction
| | +--:(unnumbered-link-hop)
| | | +--ro unnumbered-link-hop
| | | +--ro link-tp-id te-tp-id
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| | | +--ro node-id te-node-id
| | | +--ro hop-type? te-hop-type
| | | +--ro direction? te-link-direction
| | +--:(as-number)
| | | +--ro as-number-hop
| | | +--ro as-number inet:as-number
| | | +--ro hop-type? te-hop-type
| | +--:(label)
| | +--ro label-hop
| | +--ro te-label
| | ...
| +--ro pcc-original? -> /pcep/entity/peers/peer/addr
| +--ro req-id? uint32
| +--ro retrieved? boolean
| +--ro pcc-retrieved? -> /pcep/entity/peers/peer/addr
| +--ro creation-time? yang:timestamp
| +--ro discard-time? uint32
| +--ro reuse-time? uint32
+--rw peers
+--rw peer* [addr]
+--rw addr inet:ip-address
+--rw role pcep-role
+--rw description? string
+--rw domain
| +--rw domain* [domain-type domain]
| +--rw domain-type domain-type
| +--rw domain domain
+--rw capability
| +--rw capability? bits
| +--rw pce-initiated? boolean
| | {pce-initiated}?
| +--rw include-db-ver? boolean
| | {stateful,sync-opt}?
| +--rw trigger-resync? boolean
| | {stateful,sync-opt}?
| +--rw trigger-initial-sync? boolean
| | {stateful,sync-opt}?
| +--rw incremental-sync? boolean
| | {stateful,sync-opt}?
| +--rw sr {sr}?
| +--rw enabled? boolean
| +--rw msd-limit? boolean
| +--rw nai? boolean
+--rw msd? uint8 {sr}?
+--rw pce-info
| +--rw scope
| | +--rw path-scope? bits
| | +--rw intra-area-pref? uint8
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| | +--rw inter-area-pref? uint8
| | +--rw inter-as-pref? uint8
| | +--rw inter-layer-pref? uint8
| +--rw neigh-domains
| +--rw domain* [domain-type domain]
| +--rw domain-type domain-type
| +--rw domain domain
+--rw delegation-pref? uint8 {stateful}?
+--rw auth
| +--rw (auth-type-selection)?
| +--:(auth-key-chain)
| | +--rw key-chain? kc:key-chain-ref
| +--:(auth-key)
| | +--rw crypto-algorithm identityref
| | +--rw (key-string-style)?
| | +--:(keystring)
| | | +--rw keystring? string
| | +--:(hexadecimal) {kc:hex-key-string}?
| | +--rw hexadecimal-string?
| | yang:hex-string
| +--:(auth-tls) {tls}?
| +--rw (role)?
| +--:(server)
| | +--rw tls-server
| | ...
| +--:(client)
| +--rw tls-client
| ...
+--ro discontinuity-time? yang:timestamp
+--ro initiate-session? boolean
+--ro session-exists? boolean
+--ro session-up-time? yang:timestamp
+--ro session-fail-time? yang:timestamp
+--ro session-fail-up-time? yang:timestamp
+--ro sessions
+--ro session* [initiator]
+--ro initiator pcep-initiator
+--ro role? -> /pcep/entity/role
+--ro state-last-change? yang:timestamp
+--ro state? pcep-sess-state
+--ro session-creation? yang:timestamp
+--ro connect-retry? yang:counter32
+--ro local-id? uint8
+--ro remote-id? uint8
+--ro keepalive-timer? uint8
+--ro peer-keepalive-timer? uint8
+--ro dead-timer? uint8
+--ro peer-dead-timer? uint8
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+--ro ka-hold-time-rem? uint8
+--ro overloaded? boolean
+--ro overload-time? uint32
+--ro peer-overloaded? boolean
+--ro peer-overload-time? uint32
+--ro lspdb-sync? sync-state
| {stateful}?
+--ro recv-db-ver? uint64
| {stateful,sync-opt}?
+--ro of-list {objective-function}?
| +--ro objective-function* [of]
| +--ro of identityref
+--ro pst-list
| +--ro path-setup-type* [pst]
| +--ro pst identityref
+--ro assoc-type-list {association}?
| +--ro assoc-type* [at]
| +--ro at identityref
+--ro speaker-entity-id? string
| {sync-opt}?
+--ro discontinuity-time? yang:timestamp
rpcs:
+---x trigger-resync {stateful,sync-opt}?
+---w input
+---w pcc? -> /pcep/entity/peers/peer/addr
notifications:
+---n pcep-session-up
| +--ro peer-addr? -> /pcep/entity/peers/peer/addr
| +--ro session-initiator?
| | -> /pcep/entity/peers/peer/sessions/session/initiator
| +--ro state-last-change? yang:timestamp
| +--ro state? pcep-sess-state
+---n pcep-session-down
| +--ro peer-addr? -> /pcep/entity/peers/peer/addr
| +--ro session-initiator? pcep-initiator
| +--ro state-last-change? yang:timestamp
| +--ro state? pcep-sess-state
+---n pcep-session-local-overload
| +--ro peer-addr? -> /pcep/entity/peers/peer/addr
| +--ro session-initiator?
| | -> /pcep/entity/peers/peer/sessions/session/initiator
| +--ro overloaded? boolean
| +--ro overload-time? uint32
+---n pcep-session-local-overload-clear
| +--ro peer-addr? -> /pcep/entity/peers/peer/addr
| +--ro overloaded? boolean
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+---n pcep-session-peer-overload
| +--ro peer-addr? -> /pcep/entity/peers/peer/addr
| +--ro session-initiator?
| | -> /pcep/entity/peers/peer/sessions/session/initiator
| +--ro peer-overloaded? boolean
| +--ro peer-overload-time? uint32
+---n pcep-session-peer-overload-clear
+--ro peer-addr? -> /pcep/entity/peers/peer/addr
+--ro peer-overloaded? boolean
6. The Design of PCEP Statistics Data Model
The module, "ietf-pcep-stats", augments the ietf-pcep module to
include statistics at the PCEP peer and session level.
module: ietf-pcep-stats
augment /p:pcep/p:entity/p:peers/p:peer:
+--ro num-sess-setup-ok? yang:counter32
+--ro num-sess-setup-fail? yang:counter32
+--ro pcep-stats
+--ro avg-rsp-time? uint32
+--ro lwm-rsp-time? uint32
+--ro hwm-rsp-time? uint32
+--ro num-pcreq-sent? yang:counter32
+--ro num-pcreq-rcvd? yang:counter32
+--ro num-pcrep-sent? yang:counter32
+--ro num-pcrep-rcvd? yang:counter32
+--ro num-pcerr-sent? yang:counter32
+--ro num-pcerr-rcvd? yang:counter32
+--ro num-pcntf-sent? yang:counter32
+--ro num-pcntf-rcvd? yang:counter32
+--ro num-keepalive-sent? yang:counter32
+--ro num-keepalive-rcvd? yang:counter32
+--ro num-unknown-rcvd? yang:counter32
+--ro num-corrupt-rcvd? yang:counter32
+--ro num-req-sent? yang:counter32
+--ro num-req-sent-pend-rep? yang:counter32
+--ro num-req-sent-ero-rcvd? yang:counter32
+--ro num-req-sent-nopath-rcvd? yang:counter32
+--ro num-req-sent-cancel-rcvd? yang:counter32
+--ro num-req-sent-error-rcvd? yang:counter32
+--ro num-req-sent-timeout? yang:counter32
+--ro num-req-sent-cancel-sent? yang:counter32
+--ro num-req-rcvd? yang:counter32
+--ro num-req-rcvd-pend-rep? yang:counter32
+--ro num-req-rcvd-ero-sent? yang:counter32
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+--ro num-req-rcvd-nopath-sent? yang:counter32
+--ro num-req-rcvd-cancel-sent? yang:counter32
+--ro num-req-rcvd-error-sent? yang:counter32
+--ro num-req-rcvd-cancel-rcvd? yang:counter32
+--ro num-rep-rcvd-unknown? yang:counter32
+--ro num-req-rcvd-unknown? yang:counter32
+--ro svec {p:svec}?
| +--ro num-svec-sent? yang:counter32
| +--ro num-svec-req-sent? yang:counter32
| +--ro num-svec-rcvd? yang:counter32
| +--ro num-svec-req-rcvd? yang:counter32
+--ro stateful {p:stateful}?
| +--ro num-pcrpt-sent? yang:counter32
| +--ro num-pcrpt-rcvd? yang:counter32
| +--ro num-pcupd-sent? yang:counter32
| +--ro num-pcupd-rcvd? yang:counter32
| +--ro num-rpt-sent? yang:counter32
| +--ro num-rpt-rcvd? yang:counter32
| +--ro num-rpt-rcvd-error-sent? yang:counter32
| +--ro num-upd-sent? yang:counter32
| +--ro num-upd-rcvd? yang:counter32
| +--ro num-upd-rcvd-unknown? yang:counter32
| +--ro num-upd-rcvd-undelegated? yang:counter32
| +--ro num-upd-rcvd-error-sent? yang:counter32
| +--ro initiation {p:pce-initiated}?
| +--ro num-pcinitiate-sent? yang:counter32
| +--ro num-pcinitiate-rcvd? yang:counter32
| +--ro num-initiate-sent? yang:counter32
| +--ro num-initiate-rcvd? yang:counter32
| +--ro num-initiate-rcvd-error-sent? yang:counter32
+--ro path-key {p:path-key}?
| +--ro num-unknown-path-key? yang:counter32
| +--ro num-exp-path-key? yang:counter32
| +--ro num-dup-path-key? yang:counter32
| +--ro num-path-key-no-attempt? yang:counter32
+--ro num-req-sent-closed? yang:counter32
+--ro num-req-rcvd-closed? yang:counter32
augment /p:pcep/p:entity/p:peers/p:peer/p:sessions/p:session:
+--ro pcep-stats
+--ro avg-rsp-time? uint32
+--ro lwm-rsp-time? uint32
+--ro hwm-rsp-time? uint32
+--ro num-pcreq-sent? yang:counter32
+--ro num-pcreq-rcvd? yang:counter32