802.5 Enhanced Source Routing PAR and 5 Criteria
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Proposed PAR:
IEEE Standards Board
Project Authorization Request (PAR) Form
1. Sponsor Date
2. Assigned Project
3. PAR Approval
of Request
Number
Date
[1998 Feb 6]
[P802.5?]
_____________
[...] PAR Signature
Page received
{IEEE Staff to
check box}
4. Project Title, Recorder and Working Group/Sponsor for this Project
Document type and title: {Place an X in only one option below}
[X] Standard for{document stressing the verb "shall"}
[..] Recommended Practice for{document stressing the verb "should"}
[..] Guide for {document stressing the verb "may"}
Title: [Supplement to – Information technology Telecommunications
and information exchange between systems – Local and metropolitan
area networks — Media access control (MAC) bridges
AMENDMENT ?: Enhanced Source Routing]
{Copyright release must be submitted with appropriate signatures by postal mail or FAX (1-732-5621571)}
Name of Working Group:
[IEEE 802.5 Token Ring Working
Group]
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Name of Official Reporter (usually the W.G. Chair)
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[Robert D. Love]
Title in WG:
[Chair, IEEE 802.5 Working Group]
IEEE/Affiliate Member
#
[1609353]
Company:
[IBM]
Telephone:
[919 5432746]
Address:
[PO Box 12195 DGTA/664]
FAX:
[919 2545410]
City/State/Zip:
[Research Triangle Park/NC/27709]
Email:
[rdlove@us
.ibm.com]
[]
Name of Working Group Chair (if different):
IEEE/Affiliate Member #
[...]
Company:
[]
Telephone:
[]
Address:
[]
FAX:
[]
City/State/Zip:
[]
Email:
[]
Name of Sponsoring Society and
Committee:
[IEEE Computer Society / LAN MAN Standards
Committee]
Name of Committee Sponsor Chair:
[James Carlo]
Company:
[Texas Instruments Inc.]
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IEEE/Affiliate Member #
[05572953]
Telephone:
[972-480-2524]
802.5 Enhanced Source Routing PAR and 5 Criteria
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Address:
[9208 Heatherdale Drive]
FAX:
[972-480-2611]
City/State/Zip:
[Dallas/TX/75243]
Email:
[jcarlo@ti.com]
5. Describe This Project; Answer each of four questions below:
a.
Update an existing PAR [NO]
If YES, indicate PAR Number/Approval Date [P####-YEAR]
If YES, attach a cover letter indicating changes/rationale for changes.
If YES, is this project in ballot now? [yes/no]
b.
Choose one from the following:
[NO] New Standard
[NO] Revision of existing Standard {number and year} [NO]
[YES] Supplement to an existing standard {number and year) [802.1d/1998]
c.
Choose one from the following:
[X] Full Use (5-year life cycle)
[...] Trial Use (2-year life cycle)
d.
Fill in Target Completion Date to IEEE RevCom : [07/00]
6. Scope of Proposed Project:
[ The source route bridging method [802.1d] will be enhanced to provide additional
resilience and may be enhanced to provide additional load sharing capabilities.]
7. Purpose of Proposed Project:
[ To address the limitations in recovery after link failure in source routed 802 LANs
today.
To investigate further enhancement of the existing load sharing capabilities in source
routed 802 networks.]
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8. Intellectual Property {Answer each of the questions below}
a.
Are you aware of any patents relevant to this project?
[YES] {Yes, with detailed explanation below / No}
[Patents which apply to the present source routing technology still apply. Patent
letters covering these patents are on file with IEEE. If other technology to be
incorporated into the standard requires the use of other patents, the appropriate
letters of permission will be sought.] {Explanation}
b.
Are you aware of any copyrights relevant to this project?
[NO] {Yes, with detailed explanation below / No}
[...] {Explanation}
c.
Are you aware of any trademarks relevant to this project?
[NO] {Yes, with detailed explanation below / No}
[...] {Explanation}
9. Are you aware of any other standards or projects with a similar
scope?
[NO] {Yes, with detailed explanation below / No}
[] {Explanation}
10. International Harmonization
Is this standard planned for adoption by another international organization?
[YES] {Yes/No/?? if you don't know at this time}
If Yes: Which International Organization [ISO/IEC JTC/1 SC/6]
If Yes: Include coordination in question 13 below
If No: Explanation [...]
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11. Is this project intended to focus on health, safety or environmental
issues?
[NO] {Yes/No/?? if you don't know at this time}
If Yes: Explanation [...]
12. Proposed Coordination/Recommended Method of Coordination
a.
Mandatory Coordination
SCC 10 (IEEE Dictionary)
by DR
IEEE Staff Editorial Review by
by DR
SCC 14 (Quantities, Units and Letter symbols)
by DR
{Circulation of DRafts}
b.
Coordination requested by
Sponsor:
[US TAG for JTC1/SC6 WG
3]
by [DR (via US
TAG)]
{circulation of DRafts/LIaison memb/COmmon
memb}
[ US TAG for SC25/WG4]
by [DR]
{circulation of DRafts/LIaison memb/COmmon
memb}
[]
by […]
{circulation of DRafts/LIaison memb/COmmon
memb}
[........................]
by [...]
{circulation of DRafts/LIaison memb/COmmon
memb}
c.
Coordination Requested by
Others:
[...] {added by staff}
Additional Explanation Notes: {Item Number and Explanation}
[...]{If necessary, these can be continued on additional pages}
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The PAR Copyright Release and Signature Page must be submitted by FAX or physical
delivery before this PAR will be sent on for NesCom and Standards Board approval.
-----------End of Proposed PAR
-----------Proposed 5 Criteria
5 CRITERIA:
1 Broad Market Potential
A standards project authorized by IEEE 802 shall have a broad market potential. Specifically, it shall have
the potential for:
a)
Broad sets of applicability.
b) Multiple vendors and numerous users.
c)
Balanced costs (LAN versus attached stations).
Broad sets of applicability
The Token Ring market today exceeds $2 billion/year. A significant portion of Token Ring networks employ
source routing. The increasing requirements for delay sensitive and variation sensitive data applications has
focused attention on increasing resilience in source routed networks.
Many networks today deploy source routing due to scalability and resilience provided through the support of
redundant paths. Even though source routing does provide some level of resilience, there is no scheme as to
how this is applied for source routed networks and source routed clients. This proposed standard specifies how
resilience can be obtained using enhanced source routing.
This proposed standard specifies rules for source routing behavior, which provide increased resilience to the
installed source routing base.
This proposed standard preserves the frame format and management compatibility’s of existing source routing
applications and will ensure that source routing networks can seamlessly migrate to enhanced source routed
networks.
Multiple vendors and numerous users
x participants from y companies have indicated their support for creating an interoperable standard.
Source routing is widely deployed in Token Ring networks today and is therefore applicable for a large
customer base.
Balanced costs (LAN versus attached stations)
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The cost of enhanced source routing is in line with the current 802.1d techniques. The different proposals have
different cost distributions but in each case these are similar to the current method.
2 Compatibility
IEEE 802 defines a family of standards. All standards shall be in conformance with the IEEE 802.1
Architecture, Management and Interworking documents as follows: 802. Overview and Architecture,
802.1D, 802.1Q and parts of 802.1f. If any variances in conformance emerge, they shall be thoroughly
disclosed and reviewed with 802.
Each standard in the IEEE 802 family of standards shall include a definition of managed objects which are
compatible with systems management standards.
The proposed standard will enhance 802.1d for source routed networks and will otherwise be compatible with
it. Any new managed objects will be compatible with existing system management standards.
3 Distinct Identity
Each IEEE 802 standard shall have a distinct identity. To achieve this, each authorized project shall be:
a)
Substantially different from other IEEE 802 standards.
b) One unique solution per problem (not two solutions to a problem).
c)
Easy for the document reader to select the relevant specification.
Substantially different from other IEEE 802 standards
This will extend 802.1d, which is a unique standard.
One unique solution per problem (not two solutions to a problem)
By extending 802.1d, one unique solution will apply. No other projects are addressing these needs of source
routed networks.
Easy for the document reader to select the relevant specification
The proposed standard will be a supplement to the existing 802.1d standard and will be formatted as a new
clause(s), making it easy for the reader to select the relevant specification.
4 Technical Feasibility
For a project to be authorized, it shall be able to show its technical feasibility. At a minimum, the proposed
project shall show:
a)
Demonstrated system feasibility.
b) Proven technology, reasonable testing.
c)
Confidence in reliability.
Demonstrated system feasibility
Source routing bridges are available today and have a proven track record.
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The envisaged techniques have either already been deployed or are based on technologies already deployed in
LANs today.
Proven technology, reasonable testing
The envisaged techniques are based on enhancing source routing methods using already proven technologies.
It is expected that the solution will require testing in line with testing required for standard source routing
devices.
Confidence in reliability
The reliability of existing source routing products provides adequate confirmation that devices conforming to
this proposed standard will be reliable.
The enhancements contained in this proposed standard will be based on technology that has been deployed in
other networking standards.
5 Economic Feasibility
For a project to be authorized, it shall be able to show economic feasibility (so far as can reasonably be
estimated), for its intended applications. At a minimum, the proposed project shall show:
a)
Known cost factors, reliable data.
b) Reasonable cost for performance.
c)
Consideration of installation costs.
Known cost factors, reliable data
Enhanced source routing is either a matter of software upgrades to existing equipment. As such, the cost factor
is well understood. Or a feature added to new equipment. The enhanced source routing feature does not add
significant cost as compared to other source routing equipment.
Reasonable cost for performance
This proposed standard will enhance the performance as compared to existing source routing bridges without
significantly increasing cost.
Consideration of installation costs
Some of the envisaged techniques apply to end stations and some to the core network, causing the cost
implication to be dependent on the technique chosen.
For the different classes of solutions envisaged, the installation costs are expected to be either
- small due to the use of software upgrades of end stations or core devices – or –
- in line with the cost of installing new core devices where these enhancements are provided through
deployment of the next generation infrastructure.
--------------End of Proposed 5 Criteria
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