Drafts

Draft 01

Efficient XML Interchange Capability for NETCONF draft-varga-netconf-exi-capability-02

The Network Configuration Protocol (NETCONF) provides mechanisms to install, manipulate, and delete the configuration of network devices via exchange of XML messages in textual representation. Efficient XML Interchange (EXI) is a W3C-recommended binary representation of XML Information Set, which is more efficient from both CPU and bandwidth utilization perspective. This document defines a capability-based extension to the NETCONF protocol that allows peers to agree to exchange protocol messages using EXI encoding.

Draft 02

PCEP Extensions for Stateful PCE draft-ietf-pce-stateful-pce-11

The Path Computation Element Communication Protocol (PCEP) provides mechanisms for Path Computation Elements (PCEs) to perform path computations in response to Path Computation Clients (PCCs) requests.
Although PCEP explicitly makes no assumptions regarding the information available to the PCE, it also makes no provisions for PCE control of timing and sequence of path computations within and across PCEP sessions. This document describes a set of extensions to PCEP to enable stateful control of MPLS-TE and GMPLS LSPs via PCEP.

Draft 03

PCEP Extensions for PCE-initiated LSP Setup in a Stateful PCE Model draft-ietf-pce-pce-initiated-lsp-04

The Path Computation Element Communication Protocol (PCEP) provides mechanisms for Path Computation Elements (PCEs) to perform path computations in response to Path Computation Clients (PCCs) requests.
The extensions for stateful PCE provide stateful control of Multiprotocol Label Switching (MPLS) Traffic Engineering Label Switched Paths (TE LSP) via PCEP, for a model where the PCC delegates control over one or more locally configured LSPs to the PCE. This document describes the creation and deletion of PCE-initiated LSPs under the stateful PCE model.

Draft 04

Conveying path setup type in PCEP messages draft-ietf-pce-lsp-setup-type-03

A Path Computation Element can compute traffic engineering paths (TE paths) through a network that are subject to various constraints. Currently, TE paths are label switched paths (LSPs) which are set up using the RSVP-TE signaling protocol. However, other TE path setup methods are possible within the PCE architecture. This document proposes an extension to PCEP to allow support for different path setup methods over a given PCEP session.

Draft 05

A Data Model for Network Topologies draft-ietf-i2rs-yang-network-topo-01

This document defines an abstract (generic) YANG data model for network/service topologies and inventories. The model serves as a base model which is augmented with technology-specific details in other, more specific topology and inventory models.

Draft 06

A YANG Data Model for Layer 3 Topologies draft-ietf-i2rs-yang-l3-topology-00

This document defines a YANG data model for layer 3 network topologies.

Draft 07

Optimizations of Label Switched Path State Synchronization Procedures for a Stateful PCE draft-ietf-pce-stateful-sync-optimizations-02

A stateful Path Computation Element (PCE) has access to not only the information disseminated by the network’s Interior Gateway Protocol (IGP), but also the set of active paths and their reserved resources for its computation. The additional Label Switched Path (LSP) state information allows the PCE to compute constrained paths while considering individual LSPs and their interactions. This requires a reliable state synchronization mechanism between the PCE and the network, PCE and path computation clients (PCCs), and between cooperating PCEs. The basic mechanism for state synchronization is part of the stateful PCE specification. This draft presents motivations for optimizations to the base state synchronization procedure and specifies the required Path Computation Element Communication Protocol (PCEP) extensions.

Draft 08

North-Bound Distribution of Link-State and TE Information using BGP draft-ietf-idr-ls-distribution-11

In a number of environments, a component external to a network is called upon to perform computations based on the network topology and current state of the connections within the network, including traffic engineering information. This is information typically distributed by IGP routing protocols within the network.

This document describes a mechanism by which links state and traffic engineering information can be collected from networks and shared with external components using the BGP routing protocol. This is achieved using a new BGP Network Layer Reachability Information (NLRI) encoding format. The mechanism is applicable to physical and virtual IGP links. The mechanism described is subject to policy control.

Applications of this technique include Application Layer Traffic Optimization (ALTO) servers, and Path Computation Elements (PCEs).

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