Packet Optical Transport (POT) Fred Ellefson, 2/3/2009

Packet Optical Transport (POT) Fred Ellefson, 2/3/2009

Trends and challenges Bandwidth growths and cost reduction Annual Internet traffic growth rates: ~ 50-60% US, world Source: University of Michigan, end of 2007 Example: Facebook 73 million active users 1+ million new users/week #1 photo site on Internet 20,000 application Bandwidth Video enabled OPEX/CAPEX reduction (multiple web services, millions of users) Cost per bit transport (optical): ~ 20% reduction per year Continuous scaling and cost reduction: 40G/100G, highly tolerant, ROADMs, Reach extension (single, multi-span), eliminate need for offices, Ease-of-use, 2

Network/Ethernet evolution Early adopters Mass market Total domination Best Effort Ethernet Carrier Ethernet Ethernet as Transport Ethernet over any media Ethernet as a service Ubiquity, OAM & SLAs key challenges EoSONET, EoTDM, EoDSL, etc Any media over Ethernet Fiber dominant in core, regional & campus Transport requirements added to Ethernet Frame relay, ATM, private line carried over Ethernet 3

Ethernet & transport evolution IP Layer Ethernet Layer SONET Layer Optical layer IP Layer Ethernet Layer Optical layer Transport requirement Operations, admin. & maintenance (OAM) Ethernet as service IP Ping, echo, traceroute Ethernet as Transport Protection switching LAG/STP 50msec (G.8031) full set including SLA monitoring (802.1ag, Y.1731, RFC-2544) Synchronization No Synchronous Ethernet (G.8261/2/4) Services supported IP/Ethernet IP/Ethernet + T1, T3, FR, ATM, etc (PWE3) Access topologies Point to point 1+1, tree, ring (G.8031 & G.8032) Traffic engineering Switched mesh Provisioned (PBB-TE, MPLS-TP) Control Plane None GMPLS for Ethernet Label Switching (GELs) Ethernet evolves to replace SONET 4

Packet Optical Transport (POT) ROADM WDM transport + = Layer 2 switch Packet Optical Transport (POT) Packet Optical Transport is the combination of wavelength and EVC (VLAN) level switching Provides high order and low order switching similar to SONET Optimizes fill within transport network Enables separating users/applications in either the optical or EVC (VLAN) domain Reduces O-E-O conversions to reduce capital and energy costs 5

Layered traffic management POT Legacy TDM (SONET/SDH) VT1.5 STS-1 Low order NGN transition High order Packet Optical Transport (POT) EVC/VLAN Wavelength L2 card ROADM Highly efficient Carrier Ethernet transport 6

More granularity Duct Cable Fiber Wavelength Pipe Subpipe 7

Pipe vs. sub-pipe aggregation (Full) pipe aggregation Sub-pipe aggregation 1 2 3 4 5 6 1 2 3 4 5 6 7 8 9 10 11 12 13 14 7 8 9 10 15 16 17 18 19 20 10 * GE port into 10G uplink 20 * GE port (partly filled) into 10GE uplink 1 2 3 4 5 6 7 8 9 10 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 only aggregation to be used with filled pipes aggregation + consolidation to be used with just partially filled pipes 8

EVC/VLAN switching L2 Card : 1 2 20 L2 Card 1 2 1 1 2 2 1 2 L2 Card 1 2 20 : 1 GbE 10GbE 10GbE 10GbE 10GbE 1 GbE GbE links 10GbE links EVC/VLAN cross-connection Wavelength and VLAN switching simplifies nodal design 9

Today R&E backbone eg Internet2 Aggregation layer eg Regional Optical Network (RON) GE pipes only Campus network End users eg RESNET, researchers, labs, classrooms etc 10

POT solution R&E backbone eg Internet2 VLAN/EVC Cross-Connect Aggregation layer eg Regional Optical Network (RON) VLAN/EVC Cross-Connect Campus network 10GE pipes VLAN/EVC Mux End users eg RESNET, researchers, labs, classrooms etc 11

End-to-end protected services S-VLAN 2 (protection) S-VLAN 1 CORE ITU-T G.8031 or LAG Reconfigurable optical core network CIR trails set up through network Protection managed by edge device Performance monitoring & OAM functions provided by edge device 12

Business case (Why) EVC/VLAN based networking / aggregation & transport is more efficient than full pipe / circuit based transport Less overhead, less unused capacity even overbooking possible Lower cost than SONET/SDH More flexible than pipe or wavelength based connectivity 13

OADM ring plus Ethernet switching Eth Aggr. 1 L2 switch L2 switch Cost analysis components: L2 switch Cost analysis components: 10 Gbit/s IF module, transceiver DSLAM L2 switch L2 switch Cost analysis components: 10 Gbit/s transponder Eth Aggr. 2 Logical connection 14

OADM ring with integrated L2 card (POT) Cost analysis components: L2 card L2 card 1... 20 Cost analysis components: 10 Gbit/s XFP FRN Eth Aggr. 2 Logical connection 15

External L2 switch vs. L2 card 100,00% 90,00% 80,00% 70,00% 60,00% 50,00% 40,00% Transponder Transceiver 10G IF module L2 switch 30,00% 20,00% 10,00% 0,00% external L2 switch integrated L2 card (POT) 16

CAPEX / OPEX analysis WDM with integrated Ethernet aggregation saves Network elements (= number of boxes) Interfaces Power consumption Space consumption and reduces NMS effort OPEX and increases MTBF Network availability/reliability 17

POT deployment drivers Source: Infonetics, 2008 % 18

POT market forecast $M Source: Heavy Reading, Packet-Enabled Optical Networking Quarterly Market Tracker, June 2008 19

Summary Marriage of optics and Ethernet (VLANs) is synergistic provides layered management POT offers savings in OPEX and CAPEX while increasing reliability POT will be a key technology for future R&E network designs 20

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