Path Computation Element (pce)
WG | Name | Path Computation Element | |
---|---|---|---|
Acronym | pce | ||
Area | Routing Area (rtg) | ||
State | Active | ||
Charter | charter-ietf-pce-08 Approved | ||
Status update | Show Changed 2021-07-22 | ||
Document dependencies | |||
Additional resources |
GitHub Wiki, Zulip stream |
||
Personnel | Chairs | Dhruv Dhody, Julien Meuric | |
Area Director | John Scudder | ||
Secretary | Andrew Stone | ||
Delegates | Andrew Stone, John Scudder | ||
Liaison Contacts | Andrew Stone, Dhruv Dhody, Julien Meuric | ||
Liaison CC Contact | John Scudder | ||
Mailing list | Address | pce@ietf.org | |
To subscribe | https://www.ietf.org/mailman/listinfo/pce | ||
Archive | https://mailarchive.ietf.org/arch/browse/pce/ | ||
Chat | Room address | https://zulip.ietf.org/#narrow/stream/pce |
Charter for Working Group
The PCE Working Group is chartered to specify the required protocols
to enable a Path Computation Element (PCE)-based architecture for the
computation of paths for MPLS and GMPLS Point to Point and Point to
Multi-point traffic-engineered LSPs, as well as new path setup types
of Segment Routing (SR), BIER, and Detnet.
In this architecture path computation does not necessarily occur on
the head-end (ingress) node, but on some other path computation
entity that may not be physically located on each head-end node. The
TEAS Working Group is responsible for defining and extending
architectures for Traffic Engineering (TE) and it is expected that the
PCE and TEAS WGs will work closely together on elements of TE
architectures that utilize PCE.
The PCE WG works on the application of this model within a single
domain or within a group of domains (where a domain is a layer, IGP
area, or Autonomous System with limited visibility from the head-end
LSR). At this time, applying this model to large groups of domains
such as the Internet is not thought to be possible, and the PCE WG
will not spend energy on that topic.
The WG specifies the PCE communication Protocol (PCEP) and needed
extensions for communication between Path Computation Clients (PCCs)
and PCEs, and between cooperating PCEs. Security mechanisms such as
authentication and confidentiality are included.
The WG works on the mechanisms for inter-domain as well as multi-layer
path computation and PCEP extensions for communication between several
domains or network layers.
The WG defines the required PCEP extensions for Wavelength Switched
Optical Networks (WSON) and Flexible Grid while keeping consistency
with the GMPLS protocols specified in the CCAMP and TEAS WGs.
Work Items:
-
PCEP extensions to support MPLS and GMPLS Traffic Engineered LSP
path computation models involving PCEs. This includes the case of
computing the paths of intra- and inter-domain TE LSPs. Such path
computation includes the generation of primary, protection, and
recovery paths, as well as computations for (local/global)
reoptimization and load balancing. Both intra- and inter-domain
applications are covered. -
In cooperation with the TEAS Working Group, development of PCE-
based architectures for Traffic Engineering including PCE as a
Central Controller (PCECC) and Centralized Control Dynamic Routing
(CCDR). The PCEP extensions are developed in the PCE Working Group. -
In cooperation with protocol-specific Working Groups (e.g., MPLS,
CCAMP), development of LSP signaling (RSVP-TE) extensions required
to support PCE-based path computation models. -
Specification of PCEP extensions for expressing path computation
requests and responses in the various GMPLS-controlled networks,
including WSON and Flexible Grid. -
Specification of PCEP extensions for path computation in multi-layer
and inter-domain networks. -
Specification of the PCEP extensions used by a stateful PCE for
recommending a new path for an existing or new LSP to the PCC/PCE.
Further protocol extensions must cover the case where the receiving
PCC/PCE chooses not to follow the recommendation. The PCEP
extensions for state synchronization are also in scope. -
Specification of the PCEP extensions for SR-MPLS and SRv6 paths as
per the SR Policy architecture in cooperation with SPRING Working
Group. -
Specification of the PCEP extensions for new path setup types (such
as BIER and DETNET) in cooperation with the respective Working
Groups.
Milestones
Date | Milestone | Associated documents |
---|---|---|
Mar 2025 | Evaluate WG progress, recharter or close | |
Dec 2024 | Submit Enhancements to Stateful PCE | |
Mar 2024 | Submit PCEP extensions for Multipath as Proposed Standard |
draft-ietf-pce-multipath
|
Mar 2024 | Submit PCEP extensions for SR Policy as Proposed Standard |
draft-ietf-pce-segment-routing-policy-cp
|
Jan 2024 | Submit PCEP YANG Model as a Proposed Standard |
draft-ietf-pce-pcep-yang
|
Done milestones
Date | Milestone | Associated documents |
---|---|---|
Done | Submit PCEP Native-IP extensions as a Proposed Standard |
draft-ietf-pce-pcep-extension-native-ip
|