Emergence of optical DWDM networks has resulted in very high- speed core. Currently, the protocol stack consists of IP over PPP over SONET over DWDM. Is there a need for SONET in IP/DWDM networks?

Economic pressures are calling for the elimination of the SONET layer. What changes are required in IP protocols and in DWDM to make this possible? This is the topic of this talk.

This talk builds upon the companion tutorial on DWDM networks. The tutorial can be skipped by those familiar with DWDM networks.

There will be opportunity for discussion/questions during the talk. This talks covers the following topics:

• Stack Debates
• SONET Functions
• Multi-Layer Stack: Why?
• Multi-layer Stack: Problems
• IP Directly over DWDM: Why?
• IP over DWDM Node
• IP over DWDM: Issues
• Virtual Topology Issue
• IP over ATM: Lessons
• Label Switching
• Label Stacks
• Label Stack Examples
• Advantages of MPLS
• IP over MPLS over DWDM
• MPLS Control Plane: Today
• MPLS Control Plane: Tomorrow
• Optical Node Architecture

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