Lambda Labels draft-otani-ccamp-gmpls-lambda-labels-00

1
Lambda Labelsdraft-otani-ccamp-gmpls-lambda-label
s-00

• Tomohiro Otani (KDDI RD Labs)
• Hongxiang Guo (KDDI RD Labs)
• Keiji Miyazaki (Fujitsu Laboratories Ltd)
• Diego Caviglia (Ericsson)

2
Network Model

• 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 ------
  -WW-
• (LSC) (LSC) ------ (LSC)
  -D D- (LSC)
• ------- --------
  -M M-
• 
  - -
• Node-3
  
• --------
  
• WXC DWDM
  DWDM
• (LSC)
  ----- -----
• 
  
• --------
  ----- -----
• DWDM
  DWDM
• -------- --------
  
• ROADM ROADM
  

3
Problem statement

• Wavelength switched (all-)optical network
• Wavelength-based LSP establishment considering
  wavelength continuity
• Multi-vendor interoperability
• Multi-domain
• Not using a standardized label would add undue
  burden on the operator
• to enforce policy as each manufacturer may decide
  on a different representation and therefore each
  domain may have its own label formats.
• manual provisioning may lead to misconfiguration

4
Requirements

1. A wavelength label SHOULD be standardized in
   order to allow interoperability between multiple
   domains
2. 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.
5. An operator MAY want to advertise wavelength
   availability in the network.
6. Care SHOULD be taken if advertising the
   wavelength availability in order to reduce impact
   on the existing OSPF-TE.
7. To decrease the probability of operators' error
   or difficulties, it is RECOMMENDED that
   advertising using OSPF-TE/ISIS-TE be standardized
   to simplify management.

5
Label format
(1) 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 n
  Reserved
• -------------------------
  -------
• 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, 100, and 200
  GHz
• S is the sign (/-)
• n allows the computation of the specific frequency

(2) CWDM
-------------------------
------- Grid Lambda
Reserved
------------------------
-------- Grid is set to 2 for CWDM
G.694.2 Lambda 11 bits for the value of the
wavelength in nm
6
Status

• Restructured again from draft-rabbat
• Problem statements
• Requirement on label identification
• Lambda label format
• Authors believe this is in charter
• Two vendors and a carrier are authors
• Welcome a new author Keiji Miyazaki, Diego
  Caviglia
• Request for this to be a WG document to work on
  the topic
• Routing extension is after this work
• A draft on applicability of routing extension
  will be created.