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Broadband – IP Transport

Broadband – IP Transport. 2012 ACE/RUS School and Symposium May 6-9, 2012 Fort Worth, TX Brian LeCuyer, PE RVW, Inc. (402)564-2876 blecuyer@rvwinc.com. Agenda. Transport Service Requirements Transport Technologies Ethernet over SONET Native Ethernet Connection Oriented Ethernet

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Broadband – IP Transport

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  1. Broadband – IP Transport 2012 ACE/RUS School and Symposium May 6-9, 2012 Fort Worth, TX Brian LeCuyer, PE RVW, Inc. (402)564-2876 blecuyer@rvwinc.com

  2. Agenda • Transport Service Requirements • Transport Technologies • Ethernet over SONET • Native Ethernet • Connection Oriented Ethernet • Optical Transport Network (OTN) • Wave Division Multiplexing

  3. Transport Service Requirements • At the Demark • Port Types / Quantities (Current and Future) • Redundancy • Path Diversity • Hardware Protection • Uplink: STP / LAG / G.8032 (ERPS) • Power / Mounting / Environment • Certifications (NEBS, Approved Vendor Lists) • Bandwidth • Committed Information Rate (Guaranteed) • Excess Information Rate (Burst)

  4. Transport Service Requirements • Performance & Reliability • Frame Delay (Latency) / Delay Variation (Jitter) • Error Rate • Fail Over / Availability • Time to Repair • Circuit Testing & Acceptance • RFC 2544 (Bandwidth / Frame Sizes) • Y.1731 (Latency / Jitter) • Monitoring / Reporting • Real-Time / Logged • Alerting

  5. Transport Technologies • Ethernet over SONET • Native Ethernet • Connection Oriented Ethernet • Optical Transport Network (OTN) • Wave Division Multiplexing

  6. Transport Technologies • Ethernet over SONET • First Generation of “Carrier Class” Ethernet • Leverages SONET Protection Scheme • Unified TDM and Packet Transport • May be a Quick, Low-Cost Option • Limited Capacity • High Cost to Scale

  7. Transport Technologies • Native Ethernet • Optical Ethernet Directly Over Fiber • 100 Mbps to 100 Gbps • VLAN Tagging/Prioritization (802.1Q/p) • VLAN Tags Separate Services • VLAN Trunks Carry Multiple Services • “P-Bits” Prioritize Traffic

  8. Transport Technologies

  9. Transport Technologies • Native Ethernet • 802.1Q Issues • Carrier Must Dictate Customer VLAN Assignments (No Overlap Allowed) • VLAN Exhaust (No Re-Use Allowed) • MAC Limitations • Some Older Switches Can Tag but Not Trunk • 1522 Byte Frame may be Dropped • Provisioning / Administration Complexity for Larger Networks and Multipoint Customers

  10. Transport Technologies • Native Ethernet • Provider Bridges (802.1ad) • AKA: Q-in-Q / VLAN Stacking / Double Tagging • Carrier Uses “Service” VLAN (S-Tag / Outer Tag) to Carry Customer VLANs (C-Tag / Inner Tag) • Allows Customer Control of their VLAN IDs • Alleviates VLAN Exhaust • Reduces Administrative Complexity for Carrier • Does NOT Alleviate MAC Limitations

  11. Transport Technologies

  12. Transport Technologies • Native Ethernet • 802.1ad Issues • Carrier Edge Equipment Capabilities • Jumbo Frame Support Required (Edge & Transit) • MAC Limitations Still an Issue • Provisioning / Administration Complexity for Larger Networks and Multipoint Customers

  13. Transport Technologies • Native Ethernet • Redundancy / Protection • Link Aggregation (LAG) • Primarily for Customer Uplinks • Can be Used on Transport Links • Load Balancing / Incremental Bandwidth Growth • Inter-Switch or Cross-Card LAG for Redundant Hardware • Spanning Tree Protocols (STP / RSTP / MSTP) • Prevents Layer-2 Loops (Link Blocking) • Uplink or Transport Protection • Supports “Meshy” Networks (Pun Intended) • VLAN Trunks Require MSTP (802.1s) • Can be Slow on Switching and Restoration (Tunable)

  14. Transport Technologies • Native Ethernet • Redundancy / Protection • Ethernet Ring Protection Switching (G.8032) • Prevents Layer-2 Loops • Primarily Transport, Can be Used on Uplinks • Ring / Inter-Connected Ring Architectures (Not “Meshy”) • Fast - Provides sub-50ms protection and recovery • Version 2 Adds • Interconnected Rings • Manual Protection Switching (Force, Manual, Clear) • Multiple Ring Instances • Revertive / Non-Revertive Switching

  15. Transport Technologies • Connection Oriented Ethernet • Technologies that Provide Static, “Circuit-Like” Behavior for Ethernet • Provider Backbone Bridges (802.1ah) • Leverages Ethernet Standards • Like Q-in-Q Except Uses “MAC-in-MAC” • Solves MAC scaling issues

  16. Transport Technologies

  17. Transport Technologies • Connection Oriented Ethernet • PBB-TE (802.1Qay) • TE = Traffic Engineering • Enhances PBB to be More Transport “Friendly” • Eliminates Broadcast/Multicast Flooding • Does Not Use Dynamic (Learned) Forwarding Tables • No Mechanism for Loop Avoidance (Manual Prevention) • Working / Protect Paths Manually Configured • More Predictable Traffic Engineering • Requires Up-Front Planning and Provisioning

  18. Transport Technologies • Connection Oriented Ethernet • MPLS-TP • TP = Transport Profile • Simplified Subset of MPLS Protocol • Removes Complexity of Dynamic Nature of MPLS • Predetermined / Predictable / Bi-Directional Paths • PBB-TE & MPLS-TP Not Necessarily Competing Technologies • PBB-TE good fit for Access and Aggregation • MPLS-TP good fit for Core Transport Portions

  19. Transport Technologies • Optical Transport Network (OTN / G.709) • “Digital Wrapper” that provides SONET-Like operations, administration, maintenance and provisioning • Allows multiplexing of different protocols into same payload • SONET • Ethernet • SAN (FiberChannel) • Provides FEC for signal reach enhancement • Powerful adjunct to WDM systems

  20. Transport Technologies • Wave Division Multiplexing • How Transport is Scaled as Customer Demand for Ethernet Services Grows • Technology Carries Multiple Systems “Stacked” on Same Fiber Using Different Wavelengths • Integrated Platforms Combine Ethernet Transport Technologies, OTN and WDM • Carrier Ethernet Capabilities • Multiprotocol Transport • Simple and Cost-Effective Growth

  21. Transport Technologies • Wave Division Multiplexing • Key Concepts • CWDM (Coarse Wave Division Multiplexing) • Typically 4 to 16 Wave Systems • Shorter Reach • DWDM (Dense Wave Division Multiplexing) • Typically 40 to 80 Wave (100 or 50 GHz Spacing) • Long Reach (Amplification / Dispersion Compensation) • ROADM (Reconfigurable Optical Add/Drop Mux) • Optical Circuit Mapping for DWDM Systems • Automatic Power Balancing • Degrees = Directions of Transport

  22. Transport Technologies - WDM

  23. Transport Technologies – WDM

  24. Thank You! Brian LeCuyer, PE (402) 564-2876 blecuyer@rvwinc.com

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