In reply to Jaime Gomez.

Hi Jaime, the best resources on IP Optical convergence would be:
https://www.cisco.com/c/en/us/solutions/service-provider/ipodwdm/index.html
https://www.cisco.com/c/en/us/products/collateral/switches/catalyst-3750-series-switches/whitepaper_c11-718852.html
https://www.cisco.com/c/en/us/solutions/service-provider/100-gigabit-solution/index.html
https://www.cisco.com/c/en/us/solutions/service-provider/optical-network-solutions/index.html
Regards, Andrew.