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Lambda LabelsLambda Labels

draft-otani-ccamp-gmpls-lambda-labels-01

Tomohiro Otani (KDDI R&D Labs)

Hongxiang Guo (KDDI R&D Labs)

Keiji Miyazaki (Fujitsu Laboratories Ltd)

Diego Caviglia (Ericsson)

Zafar Ali (Cisco Systems)

70th IETF meeting, Dec. 2007

Summary of this draftSummary of this draft

• This draft – proposes to define a standard lambda label format to

achieve interoperability in wavelength switched all-optical networks.

• Multi-vendor environment• Multi-domain environment

– states the GMPLS signaling requirements considering wavelength continuity.

70th IETF meeting, Dec. 2007

Updates from 00 versionUpdates from 00 version

• Cleaned up texts.• Corrected and modified figures.

– Inter-connecting details in Fig. 2 are modified so as to fit to the overall architecture in Fig.1.

• Changed the label formats– Fitted to ITU-T specification– Channel spacing bits from 3 to 4– The frequency indication bits from 9 to 16

• are located at the end of the label considering a future extension.

• Requirements are limited only to signaling.

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Network Model (1)Network Model (1) | Domain A (or Vendor A) | Domain B (or Vendor B) | Node-1 Node-2 | Node-6 Node-7 +--------+ +--------+ | +-------+ +-+ +-+ +-------+ | ROADM | | ROADM +---|------+ PXC +-+D| |D+-+ PXC | | or WXC +========+ or WXC +---|------+ +-+W+=====+W+-+ | | (LSC) | | (LSC) +---|------+ (LSC) +-+D| |D+-+ (LSC) | +--------+ +--------+ | | +-|M| |M+-+ | || || | +++++++++ +-+ +-+ +++++++++ || Node-3 || | ||||||| ||||||| || +--------+ || | +++++++++ +++++++++ ||===| WXC +===|| | | DWDM | | DWDM | | (LSC) | | +--++---+ +--++---+ ||===+ +===|| | || || || +--------+ || | +--++---+ +--++---+ || || | | DWDM | | DWDM | +--------+ +--------+ | +++++++++ +++++++++ | ROADM | | ROADM | | ||||||| ||||||| | or WXC +========+ or WXC +=+ | +-+ +++++++++ +-+ +-+ +++++++++ | (LSC) | | (LSC) | | | |D|-| PXC +-+D| |D+-+ PXC | +--------+ +--------+ +=|==+W|-| +-+W+=====+W+-+ | Node-4 Node-5 | |D|-| (LSC) +-+D| |D+-+ (LSC) | | |M|-| +-+M| |M+-+ | | +-+ +-------+ +-+ +-+ +-------+ | Node-8 Node-9

70th IETF meeting, Dec. 2007

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Network Model (2)Network Model (2)+-------------------------------------------------------------+ | Domain A | Domain B | | | | | +---+ lambda 1 | +---+ | | | |---------------|---------| | | | WDM | N | lambda 2 | | N | WDM | | =====| O |---------------|---------| O |===== | | O | D | . | | D | O | | T WDM | E | . | | E | WDM T | | H =====| 2 | lambda n | | 7 |===== H | | E | |---------------|---------| | E | | R +---+ | +---+ R | | | | | N +---+ | +---+ N | | O | | | | | O | | D WDM | N | | | N | WDM D | | E =====| O | WDM | | O |===== E | | S | D |=========================| D | S | | WDM | E | | | E | WDM | | =====| 5 | | | 8 |===== | | | | | | | | | +---+ | +---+ | +-------------------------------------------------------------+

Inter-connecting details between two domains

70th IETF meeting, Dec. 2007

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RequirementsRequirements1. A wavelength label SHOULD be standardized in order to

allow interoperability between multiple domains2. The ITU-T frequency grid specified in [G.694.1] for DWDM

and wavelength information in [G.694.2] for CWDM SHOULD be used

3. Labels SHOULD be stable and not allow for rounding errors.

4. Existing labels should be still utilized appropriately.

Note: Requirements are limited only to signaling in this version.

70th IETF meeting, Dec. 2007

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Label format (DWDM)Label format (DWDM)

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 |S| Reserved | n |

+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+

• Grid is set to 1 for DWDM [G.694.1]• Frequency (THz) = 193.0 THz + n * channel spacing (THz)• Channel Spacing set to 12.5, 25, 50, and 100 GHz (In the case of

when wider channel spacing such as 0.2 THz, the combination of narrower channel spacing and the value n are utilized).

• S is the sign (+/-)• n allows the computation of the specific frequency

70th IETF meeting, Dec. 2007

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Label format (CWDM)Label format (CWDM)

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 | Reserved | Wavelength |

+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+

• Grid is set to 2 for CWDM [G.694.2]• Lambda: 16 bits for the value of the wavelength in nm

70th IETF meeting, Dec. 2007

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Next stepsNext steps• We propose to adopt this as a working group

document.– Authors believe that the 01 version is stable now.

70th IETF meeting, Dec. 2007