Is Optical Multilayer Networking Feasible?
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1 Is Optical Multilayer Networking Feasible? George N. Rouskas Department of Computer Science North Carolina State University Is Optical Multilayer Networking Feasible? ONDM 2008 Panel, March 12, 2008 p.1
2 In the Beginning... IP PPP Ethernet FC SONET Is Optical Multilayer Networking Feasible? ONDM 2008 Panel, March 12, 2008 p.2
3 And The Users Were Not Happy... Is Optical Multilayer Networking Feasible? ONDM 2008 Panel, March 12, 2008 p.3
4 And The Users Were Not Happy... and went to the Net Engineers with many lamentations and demands: Is Optical Multilayer Networking Feasible? ONDM 2008 Panel, March 12, 2008 p.3
5 And The Users Were Not Happy... and went to the Net Engineers with many lamentations and demands: interoperability faster speeds QoS QoP Is Optical Multilayer Networking Feasible? ONDM 2008 Panel, March 12, 2008 p.3
6 And The Users Were Not Happy... and went to the Net Engineers with many lamentations and demands: interoperability faster speeds QoS QoP and the Net Engineers went to work, and toiled through the bubble Is Optical Multilayer Networking Feasible? ONDM 2008 Panel, March 12, 2008 p.3
7 How Far We ve Come... Sub rate services UNI UNI Network (Client) Layer (Layers 2,3) MSPP NGS Mesh Next Gen SONET/MSPP Layer (Layer 1.5) 1GE, 10GE 1/2 G FC DCS Optical DWDM Layer (Layer 1) DWDM Mesh Core DWDM Regional OXC ROADM DWDM Mesh Core OXC Is Optical Multilayer Networking Feasible? ONDM 2008 Panel, March 12, 2008 p.4
8 How Far We ve Come... Sub rate services UNI UNI Network (Client) Layer (Layers 2,3) MSPP NGS Mesh Next Gen SONET/MSPP Layer (Layer 1.5) 1GE, 10GE 1/2 G FC DCS Optical DWDM Layer (Layer 1) DWDM Mesh Core DWDM Regional OXC ROADM DWDM Mesh Core OXC Is Optical Multilayer Networking Feasible? ONDM 2008 Panel, March 12, 2008 p.4
9 How Far We ve Come... Sub rate services UNI UNI Network (Client) Layer (Layers 2,3) MSPP NGS Mesh Next Gen SONET/MSPP Layer (Layer 1.5) 1GE, 10GE 1/2 G FC DCS Optical DWDM Layer (Layer 1) DWDM Mesh Core DWDM Regional OXC ROADM DWDM Mesh Core OXC Is Optical Multilayer Networking Feasible? ONDM 2008 Panel, March 12, 2008 p.4
10 Cross-Layer Interactions: Network Resiliency Single-layer only bottom layer: too coarse, cannot handle higher layer failures top layer: too fine, may require lots of recovery actions Is Optical Multilayer Networking Feasible? ONDM 2008 Panel, March 12, 2008 p.5
11 Cross-Layer Interactions: Network Resiliency Single-layer only bottom layer: too coarse, cannot handle higher layer failures top layer: too fine, may require lots of recovery actions Multi-layer strategies: no coordination escalation strategy: bottom-up or top-down hold-off timer token passing Is Optical Multilayer Networking Feasible? ONDM 2008 Panel, March 12, 2008 p.5
12 Cross-Layer Interactions: Network Resiliency Single-layer only bottom layer: too coarse, cannot handle higher layer failures top layer: too fine, may require lots of recovery actions Multi-layer strategies: no coordination escalation strategy: bottom-up or top-down hold-off timer token passing Cross-layer approach: integrated design each layer must be aware of working/spare capacity of the other dynamic, coordinated logical topology modification Is Optical Multilayer Networking Feasible? ONDM 2008 Panel, March 12, 2008 p.5
13 So Where Do We Stand? Layering: separation of concerns too limiting today No good way for bi-directional information exchange between layers Cross-layer solutions difficult today engineered within constraints of layering only apply to specific context Is Optical Multilayer Networking Feasible? ONDM 2008 Panel, March 12, 2008 p.6
14 So Where Do We Stand? Layering: separation of concerns too limiting today No good way for bi-directional information exchange between layers Cross-layer solutions difficult today engineered within constraints of layering only apply to specific context We are back where we started!!! Is Optical Multilayer Networking Feasible? ONDM 2008 Panel, March 12, 2008 p.6
15 So Where Do We Stand? Layering: separation of concerns too limiting today No good way for bi-directional information exchange between layers Cross-layer solutions difficult today engineered within constraints of layering only apply to specific context We are back where we started!!! Attend my talk tomorrow :-) Is Optical Multilayer Networking Feasible? ONDM 2008 Panel, March 12, 2008 p.6
16 Will You Have (Fried) Packets with That? Issues even at the data plane: burst-mode transceivers Matisse Networks? buffers data vortex? µs switching Is Optical Multilayer Networking Feasible? ONDM 2008 Panel, March 12, 2008 p.7
17 Circuits And Packets (1) IP OPS DWDM Is Optical Multilayer Networking Feasible? ONDM 2008 Panel, March 12, 2008 p.8
18 Circuits And Packets (2) IP OPS DWDM Is Optical Multilayer Networking Feasible? ONDM 2008 Panel, March 12, 2008 p.9
19 Circuits And Packets (3) IP OPS/DWDM Is Optical Multilayer Networking Feasible? ONDM 2008 Panel, March 12, 2008 p.10
20 A Note on OBS Is Optical Multilayer Networking Feasible? ONDM 2008 Panel, March 12, 2008 p.11
21 A Note on OBS Is Optical Multilayer Networking Feasible? ONDM 2008 Panel, March 12, 2008 p.11
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