Current Meeting Report
Jabber Logs

2.7.3 IP over Optical (ipo)

NOTE: This charter is a snapshot of the 55th IETF Meeting in Altanta, Georgia USA. It may now be out-of-date.

Last Modifield: 08/12/2002

James Luciani <>
Daniel Awduche <>
Sub-IP Area Director(s):
Scott Bradner <>
Bert Wijnen <>
Sub-IP Area Advisor:
Scott Bradner <>
Technical Advisor(s):
Thomas Narten <>
Mailing Lists:
General Discussion:
To Subscribe:
Description of Working Group:
The advent of switched multi-channel (e.g., WDM, DWDM, OTDM) optical networks using OXCs (Optical Cross-connects) and other optical switching elements presents many new opportunities for improving the performance of IP networks and supporting faster and more flexible provisioning of IP services. However, much needs to be specified before interoperable products based on these technologies can be deployed in service provider networks. The work needed in this area includes:

- Document the use of existing framing methods for IP over optical dataplane and control channels, and as necessary specify additional framing methods.

- Identify and document the characteristics of the optical transport network that are important for selecting paths for optical channels, setting-up optical channels, and tearing-down optical channels.

- Document the applications of the common control and measurement protocols to the technology-dependent aspects of optical path setup, teardown, and maintenance of optical channels across networks with optical components.

- Document the requirements for control of optical networks by elements outside the optical network itself.

- Document the applicability of IP-based protocols for the controlled dissemination of optical network topology, metric, and constraint information. Such information can be used for inventory management, path selection, and other purposes. The information to be exchanged should accommodate both all-optical and optical-electrical-optical switching technologies.

- If a need is identified to develop new protocols or make incompatible modifications to existing protocols (e.g., routing and signaling protocols) to accomplish the above goals, then a recharter must first be approved before undertaking such work.

The IP over Optical WG will coordinate with relevant working groups within the IETF to leverage existing work. The WG may also generate requirements for other IETF WGs as needed. Additionally, the WG may collaborate with other standards bodies and interoperability forums engaged in IP over optical activities (e.g., including ITU-T) to share information, minimize duplication of effort, and coordinate activities in order to promote interoperability and serve the best interest of the industry.

Goals and Milestones:
Done  Produce Framework document with adequate motivation and detailed description of the context and solution space for IP/optical.
Done  Submit I-D on 'carrier optical services' requirements for IP/Optical networks.
Done  Submit I-D on the unique features of optical networks that are relevant for path computation and signaling in IP/Optical contexts.
APR 02  Submit I-D on the Traffic Engineering issues that are specific to IP/Optical networks, which take into account the peculiar characteristics of the operating environment, including aspects of protection/restoration unique to IP/optical.
APR 02  Submit I-D on the requirements for distribution of optical topology state information using the common control and measurement protocols.
APR 02  Submit I-D on the requirements for signaling in IP/Optical networks using IP signaling protocols.
DEC 02  Submit applicability statements describing the use of IP based protocols for signaling and dissemination of network topology state information in IP/Optical networks.
DEC 02  Document existing encapsulation schemes for IP/optical data plane and control plane channels.
DEC 02  Submit Framework draft to IESG as a informational RFC.
  • - draft-ietf-ipo-impairments-02.txt
  • - draft-ietf-ipo-framework-02.txt
  • - draft-ietf-ipo-carrier-requirements-03.txt
  • - draft-ietf-ipo-ason-02.txt
  • - draft-ietf-ipo-optical-inter-domain-01.txt
  • No Request For Comments

    Current Meeting Report

    IP over Optical WG (ipo) Meeting Minutes
    Thursday, November 21 at 0900-1130
    CHAIRS: James Luciani 
            Daniel Awduche <>
    1) Working Group Status, Luciani, 5 mins
    Presentation of the status of the working group efforts
    2) Carrier Optical Services Requirements, 
    draft-ietf-ipo-carrier-requirements-04.txt, Ananth Nagarayan, 15min
    - describe the carrier service requirement from an itu-t/ason 
    - brief history of the document
    - fixing minor nits from version -03.txt 
    - issues: not a lot of revision from the list thus expecting more input 
    from the mailing list before moving forward
    3) GMPLS Signaling applicability, 
    -signaling-applicability-00.txt, Awduche, 20 mins
    - describe applicability statement for gmpls signalling which is 
    included in the ipo charter
    - two classes of applicability statements: 1) signalling and 2) routing 
    - focus is on rsvp-te and its gmpls capabilities.
      Benefits include
      1) rapid provisioning 
      2) interoperability between different optical sub-networks and between 
    optical and IP domains
      3) flexibility (re-confiugration/modification of the parameter of the 
    connection), and 
      4) network survivability. 
    - current draft is intented to become a wg document
    - Dan Awduche: anybody see problems to progress this to a working group 
    document ? 
    - Dimitri Papadimitriou: could the next version give more detail about the 
    label set capability usage for optical (meaning photonic) 
    - Dan Awduche: the next version will cover more on label set 
    capabilities and other label-related parameters that apply to the IPO 
    - Dan Awduche: who has read this document ? (show hands)
    - note: only few people have read this document 
    - Bert Wijnen: not too many people here have read the draft, first 10 to 20 
    people (with respect to the meeting attendance) should have to read it 
    first before progressing this i-d as a working group document 
    - Dan Awduche: ask for feedback (through the IPO mailing list) in order to 
    progres this draft.  Lot's of good feedback have been received privatel 
    - Bert Wijnen: the working group must look for positive statement and take 
    them into account, we (as IETF) seek for participation of the working 
    group (among other through the mailing list) and not for private 
    - Dan Awduche: agrees with the statement of Bert
    - Bert Wijnen: I restate, people must read the document and have to post 
    their feedback on the mailing list and this is the only way to progress 
      Bert also mentions that seeing not a lot of people have read the 
    document it is rather difficult to progress with it for the time being as a 
    working group document
    - Jim Luciani: suggest reaction on the mailing list to make progress with 
    this document
    - Dan Awduche: encourages people to write the document for the routing 
    applicablity statements (since the corresponding ccamp wg effort is 
    nearly completed)


    GMPLS Signaling Applicability Statement
    Carrier Optical Services Requirements