IP over DWDM

This paper deals with the concept of transmitting raw IP packets over an optical layer, which employs DWDM for increasing its bandwidth demand. It also gives a brief introduction to DWDM systems. The requirements for creating an all optical networks and the issues pertaining such an evolution have been discussed here. The protocol architecture based on multiprotocol lambda switching has also been discussed. This paper shall serve as a guide to the optical transport networks.