Standardisation Activities
on Flexigrid
Adrian Farrel - Old Dog Consulting
adrian@olddog.co.uk
ECOC 2013 – London, September 2013
Old Dog Consulting
Standardisation Activities on Felxigrid – ECOC 2013 – London, September 2013
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Why standardise?
Standardisation makes things work better
• Interoperability
Standardisation means you know what you are buying
• The product fulfils the publically-available specification
Standardisation means you know what to make
• The
requirements and specification have been thought through and
published
Standardisation Activities on Felxigrid – ECOC 2013 – London, September 2013
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Why standardise?
Plug-and-play compatibility is largely a myth in optical networks
• Every vendor has optical secret source
• Some potential at the optical edge
Potential of common control plane across multiple vendors
Benefits to component manufacturers
• Hardware and software
› Comoditisation
› Streamlined development costs
› Pooled learning curve and debugging
Operational, training, and research advantages
• Common elements across platforms and networks
• Staff skills are portable
Standardisation Activities on Felxigrid – ECOC 2013 – London, September 2013
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Standardisation outcomes for FP7 Projects
Increasing demand for “standardisation” as an outcome of EC-funded
projects
Why does the Commission care?
• It is a measurable outcome
› How many standards?
• It provides external verification
› The commercial world has validated the project work
• It is a valuable shared product
› The standards disseminate the project work
› It shows thought-leadership from within Europe
Why should the participants care?
• It is a way of getting (free) input to the project
• …and all the above
Standardisation Activities on Felxigrid – ECOC 2013 – London, September 2013
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Standardisation Mechanisms and Paradigms
Standardisation is a cooperative process
• Don’t expect a rubber stamp on your private work
• Do expect critical review and modification
Standardisation is not a rapid process
• Everything is done in the right order and with the right amount of review
Don’t under-estimate the value of implementation
• “Running code”
Take your work to the right standards body
• Seek out the experts and get critical review
• Don’t fuel “turf wars”
Look for open standards processes
• Open for participation
• Open work practices
• Freely available output
Standardisation Activities on Felxigrid – ECOC 2013 – London, September 2013
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Standardisation in IDEALIST
IDEALIST aims at developing data and control plane solutions based
on elastic networks enabling adaptive network and service interworking
• Includes (is built on) use of flexigridstart
• Project proposal 2011
• Project November 2012
Standardisation from day one
• Often left to the end of the project
› Very little chance of successful completion
› Leads to rushed work and a demand for a “rubber stamp”
› Causes the project work to carry on, sometimes for years
• IDEALIST puts standardisation as a key and early outcome
› Stated in the project proposal
› An immediate focus
• Work actually started as soon as the proposal was put together
Standardisation Activities on Felxigrid – ECOC 2013 – London, September 2013
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Flexigrid Data Plane Standardisation
Data plane
• Main work already completed before project start
ITU-T Recommendation G.671
• "Transmission
characteristics of optical components and subsystems“
(2009)
ITU-T Recommendation G.694.1 (revision 2)
• "Spectral
grids for WDM applications: DWDM frequency grid" (February
2012)
ITU-T Recommendation G.694.2
• "Spectral grids for WDM applications: CWDM wavelength grid“ (December
2003)
Key formulae
• Frequency (THz) = 193.1 THz + n * frequency granularity (THz)
› Frequency granularity for the flexible grid is 0.00625 THz
• Slot Width (GHz) = 12.5 GHz * m
Standardisation Activities on Felxigrid – ECOC 2013 – London, September 2013
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Flexigrid Control Plane (1 of 3)
Active work is in the CCAMP working group of the IETF
Framework and Requirements for GMPLS based control of Flexi-grid
DWDM networks
• draft-ogrcetal-ccamp-flexi-grid-fwk
• Work from 13 companies and organisations
• Work started in July 2012
• Just being adopted by the working group as a formal work item
• General discussion of building-blocks
› Switching capabilities
› TE links
› Network layering
› Path computation
Standardisation Activities on Felxigrid – ECOC 2013 – London, September 2013
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Flexigrid Control Plane (2 of 3)
Generalized Labels for the Flexi-Grid in Lambda Switch Capable (LSC)
Label Switching Routers
• draft-farrkingel-ccamp-flexigrid-lambda-label
• Work started in October 2011
• Defines the core control plane concept of a label
› Building on RFC 6205 Generalized Labels for Lambda Switching
0
1
2
3
0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
|Grid | C.S. |
Identifier
|
n
|
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
|
m
|
Reserved
|
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
› Grid = 3 = ITU-T Flex (new value)
› Channel Spacing = 5 = 6.25 GHz (new value)
› Identifier = laser/port identifier per RFC 6205
› Frequency (THz) = 193.1 THz + n * frequency granularity (THz) per RFC 6205
› Slot Width (GHz) = 12.5 GHz * m
Standardisation Activities on Felxigrid – ECOC 2013 – London, September 2013
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Flexigrid Control Plane (3 of 3)
RSVP-TE Signaling Extensions in support of Flexible Grid
• draft-zhang-ccamp-flexible-grid-rsvp-te-ext
• Work started in October 2011
• Examining the RSVP-TE requirements and extensions for Flexigrid
› Remarkably little work needed
› Use label from draft-farrkingel-ccamp-flexigrid-lambda-label
› New traffic parameter format
› Sender-Tspec
› Flowspec
GMPLS OSPF-TE Extensions in for Flexible Grid DWDM Networks
• draft-zhang-ccamp-flexible-grid-ospf-ext
• Work started in October 2011
• OSPF requirements and extensions for Flexigrid
› Main issue is how to represent and advertise available slots on a link
›
›
›
Label range (inclusive/exclusive)
Label list (inclusive/exclusive)
Bitmap
Standardisation Activities on Felxigrid – ECOC 2013 – London, September 2013
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Questions
adrian@olddog.co.uk
Standardisation Activities on Felxigrid – ECOC 2013 – London, September 2013
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