[Teas] Proposed charter update

Vishnu Pavan Beeram <vishnupavan@gmail.com> Mon, 08 October 2018 06:49 UTC

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From: Vishnu Pavan Beeram <vishnupavan@gmail.com>
Date: Mon, 8 Oct 2018 02:49:37 -0400
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To: TEAS WG <teas@ietf.org>, TEAS WG Chairs <teas-chairs@ietf.org>
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Subject: [Teas] Proposed charter update
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Over the past few months we've noted that our charter could use a bit of
an update to match the current state of TEAS and other working groups.
We've taken a pass at this and have a proposed revision.  Once the WG
agrees on changes, we'll pass those changes along to our AD who is the
actual owner of our charter.  The text is enclosed below as well as
available with changes tracked at:


Please discuss any proposed changes on the list, i.e., changes to the
charter that are suggested in the google-doc but not agreed to here will be

We'd like to have the changes agreed to by the end of this month so the
IESG may have time to review/act before  IETF103.

Thank you,
Pavan and Lou

Draft Update to TEAS WG Charter (Version 1)

The Traffic Engineering Architecture and Signaling (TEAS) Working Group
is responsible for defining IP, MPLS and GMPLS traffic engineering
architecture and identifying required related control-protocol
functions, i.e., routing and path computation element functions. The
TEAS group is also responsible for standardizing generalized, i.e.,
non-technology specific, RSVP-TE signaling protocol mechanisms,

Traffic Engineering (TE) is the term used to refer to techniques that
enable operators to control how specific traffic flows are treated
within their networks. TE is applied to packet networks via MPLS TE
tunnels and LSPs, but may also be provided by other mechanisms such as
forwarding rules similar to policy-based routing. The MPLS-TE control
plane was generalized to additionally support non-packet technologies
via GMPLS.  RSVP-TE is the signaling protocol used for both MPLS-TE and
GMPLS. Centralized and logically centralized control models are also
supported, e.g., via Abstraction and Control of Traffic Engineered
Networks (ACTN) and stateful-PCE.

 The TEAS WG is responsible for:

   a) Traffic-engineering architectures for generic applicability
across packet and non-packet networks. This includes, for example, both
networks that include the use of PCE and those that conform with ACTN
principles but don't make use of PCE. The PCE architecture itself is out
of the WG scope.

   b) Definition of protocol-independent metrics and parameters
(measurement and/or service attributes) for describing links and
tunnels/paths required for traffic engineering (and related routing,
signaling and path computation). These will be developed in conjunction
with requests and requirements from other WGs to ensure overall usefulness.

   c) Functional specification of extensions for routing (OSPF, ISIS)
and for path computation (PCE), including those that provide general
enablers of traffic-engineering systems that also use RSVP-TE. Protocol
formats and procedures that embody these extensions will be done in
coordination with the WGs supervising those protocols.

   d) Functional specification of generic (i.e., not data plane
technology-specific) extensions for RSVP-TE, and the associated protocol
formats and procedures that embody these extensions.

   e) Definition of control plane mechanisms and extensions to allow
the setup and maintenance of TE paths and TE tunnels that span multiple
domains and/or switching technologies, where a domain may be an IGP
area, an Autonomous System, or any other region of topological visibility.

   f) Definition and extension of management and security techniques
for RSVP-TE signaling. This includes configuring and monitoring RSVP-TE
as well as mechanisms used to configure, control, and report OAM within
TE networks. YANG and MIB modules may be considered.

  The TEAS working group is chartered to deliver the following:

   1. Definition of additional abstract service, link, and path
properties such as jitter, delay, and diversity. Extensions to IGPs to
advertise these properties, and extensions to RSVP-TE to request and to
accumulate these properties. Work with PCE WG to include these
properties in computation requests.

   2. Specification of terminology, architecture, and protocol
requirements for abstraction and distribution of TE information between
interconnected TE domains/layers.

   3. Specification and protocol extensions for a GMPLS External
Network-to-Network Interface (E-NNI), i.e., multi-domain GMPLS support.

   4. Protocol mechanisms to signal associated LSPs in particular with
different source nodes.

   5. Requirements and protocol extensions for additional protection
mechanisms including end-point protection, protection of P2MP LSPs, and
inter-domain protection.

   6. YANG models in support of Traffic Engineering, in coordination
with working groups working on YANG models for network topology and for
technology-specific network attributes.

  Requirements may be documented in stand-alone RFCs, may be folded
into architecture or solutions RFCs, may be recorded on a wiki, or may
be documented in an Internet-Draft that is not progressed to RFC.

  The TEAS WG will coordinate with the following working groups:

   - With the MPLS WG to maintain and extend MPLS-TE protocol
mechanisms and to determine whether they should be generalized.

   - With the CCAMP WG to maintain and extend non-packet, data plane
technology-specific TE protocol mechanisms and to determine whether they
should be generalized.

   - With the LSR (OSPF and ISIS) WG to maintain or extend TE routing

   - With the PCE WG on uses of a PCE in the traffic-engineering
architecture, on PCE extensions per the above, and on RSVP-TE extensions
to support PCE WG identified requirements.

   - With the IDR WG on the use of BGP-LS in TE environments.

   - With the DetNet WG on mechanisms (YANG models and protocols) to
support DetNet use cases.

   - With the SPRING WG on TE architecture and, where appropriate,
TE-related protocol extensions.

In doing this work, the WG will cooperate with external SDOs (such as
the ITU-T and the IEEE 802.1) as necessary.