2.7.4 IP over Resilient Packet Rings (iporpr)

NOTE: This charter is a snapshot of the 51st IETF Meeting in London, England. It may now be out-of-date. Last Modified: 31-Jul-01


Frank Kastenholz <fkastenholz@unispherenetworks.com>
Albert Herrera <aherrera@lanterncom.com>

Sub-IP Area Director(s):

Scott Bradner <sob@harvard.edu>
Bert Wijnen <bwijnen@lucent.com>

Sub-IP Area Advisor:

Bert Wijnen <bwijnen@lucent.com>

Technical Advisor(s):

Thomas Narten <narten@raleigh.ibm.com>

Mailing Lists:

General Discussion:iporpr@external.cisco.com
To Subscribe: iporpr-request@cisco.com
In Body: subscribe iporpr
Archive: ftp://ftp.ietf.org/ietf-mail-archive/iporpr/

Description of Working Group:

Resilient Packet Rings, under development within the IEEE's 802.17 RPRWG, will provide substantial enhancements in both efficiency and flexibility over current bi-directional ring topologies. Benefits of resilient packet rings (RPRs) will include spatial re-use (full utilization of both counter- rotating rings) while maintaining APS-like protection switching during media faults. The 802.17 RPRWG may develop mechanisms for topology discovery, congestion control, and protection switching. Reference the IEEE 802.17 RPRWG at http://www.ieee802.org/rprsg/index.html for further information.

In particular, the IPoRPR Working Group would produce a requirements and framework document which will be used as input to the IEEE RPRSG to help it formulate its requirements. Areas which are of particular interest to the IPoRPR Working Group will involve the layer 2 to layer 3 interaction in areas such as:

- alarm notification

- fast restoration

- fast convergence

- traffic engineering (e.g. resource availability/usage information)

- quality of service issues

This work is specifically being done in parallel with the IEEE effort so that cross fertilization between the IEEE and IETF groups takes place while the IEEE standard is being developed.

The requirements and framework document will:

- Clearly state requirements for L2-L3 interaction within these rings

- Highlight the motivation and associated benefits

- Define key components, Layer abstractions and partitioning

- Document assumptions, any observations and issues

- Formulate the mechanisms required to accomplish IP-awareness within these Resilient Packet Rings

The IPoRPR 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.

The WG will not address issues that are clearly within the MAC Layer and will not develop any protocols at this time. No formal liaison with the IEEE is anticipated. It is expected that individuals will participate directly in both groups.

Goals and Milestones:

Mar 01


Initial Requirements & Framework Document submitted as an Internet-Draft

Aug 01


Submit Requirements and Framework Document to IESG as informational

Aug 01


Recharter or shut down

No Request For Comments

Current Meeting Report

IPORPR Minutes

The IPORPR working group met 7 August 2001 at the London IETF Meeting.

The meeting was chaired by Albert Herrera and Frank Kastenholz.

The minutes were taken by Frank Kastenholz.

On the agenda were
- IEEE 802.17 update by Kahled Amer
- Update on the status and changes to the Framework document by Albert Herrera
- Working group planning, jointly by Albert Herrera and Frank Kastenholz
- A discussion of mailing list issues (added to the agenda during the time-honored agenda-bashing)
- Wrap up

Kahled Amer presented the status of the work in IEEE 802.17.

His presentation included
- An overview of the IEEE process
- A bit of history and high-level requirements for 802.17
- A technology overview
- A timeline for the 802.17 project
- A list of meetings coming up
- A set of contact infortmation (URLs and email addresses) for the 802.17 work

Details can be found in the slides

There were no questions or comments from the working group.

Albert Herrera presented an overview of the framework document (the item on the working group's charter).

The primary changes were to orient the document more towards providing input to IEEE 802 (which is a working group goal).

There were no questions or comments from the working group.

Frank Kastenholz noted that the working group's mailing list was having some administrative problems (people not being able to get subscribed in a timely manner). The chairs will change the mailing list to be run by the IETF secretariat.

When the details are worked out, they will be announced to the current mailing list.

Albert Herrera presented a plan for the future of the working group.

The primary points are
- The current framework will stay an internet draft, allowing the working group to change it quickly, as needed.
- Until IEEE 802.17 produces sufficient specifications, the working group will go dormant.
- When IEEE 802.17 produces their standard, the working group will recharter itself to deal with the low-level protocol details for encapsulating IP over the 802.17 output. It makes no sense to do this work until IEEE produce their specifications.
- The individual working group participants are encouraged to provide input to IEEE 802.17 as they see fit.
- The mailing list will remain in existance.

One comment was received from the meeting that this was "a good plan".

No other comments on the working group future were received.

One other comment was made; that IEEE 802.17 was working on some restoration/protection issues and that this might be of interest to the IETF's Traffic Engineering working group.

(Shortly after the working group meeting there was a SUB-IP area meeting, attended by the area directors and chairs; the issue was raised at the meeting and the TEWG is considered to be informed)


A HREF="slides/iporpr-0/index.html" TARGET="BLANK">Agenda
A HREF="slides/iporpr-1/index.html" TARGET="BLANK">IEEE 802.17 Resilient Packet Ring WG