Ethernet Network Planning A Multi-Layer Approach

Transcription

1 Ethernet Network Planning A Multi-Layer Approach Sukant K. Mohapatra April 17, 2008 VPIsystems Proprietary

2 Outline Introduction Ethernet Network An Overview in Context of Next-generation Network Ethernet Technology Options & Evolution Carrier Ethernet Network Planning Challenges A Multi-layer Approach in Ethernet Network Planning Conclusion 2

3 Ethernet Network In Next-generation Network QuadPlay Services BRAS Internet ATM / FR IP/MPLS PE GRS Ethernet Gateway HGW xdsl, FTTx HFC Wireless EoCopper (EoS, EoW, EoM,..) VoIP PSTN Home Access Aggregation Core Ethernet Network Optical Ethernet (MEN/WAN) Support over various Layer 1 & Technologies 3

4 Carrier Ethernet 4

5 GbE.. Data Center/ POP Interconnect IP-DSLAM STP/RSTP/MSTP/PVST MAC Flooding/Learning.. Internet Access Native Ethernet Spanning Tree Based STP A Link Management Protocol to Prevent undesirable Loop in the Network Spanning Tree Protocols (STP/RSPT) IEEE 802.1D Standard Per VLAN Spanning Tree Protocol (PVST) Maintain STP per VLAN Multiple Spanning Tree Protocol (MSTP) Issues Convergence Scalability 5

6 Ethernet over MPLS 3MB VLANS 5MB VLANS LSP Label Label VLAN ID VLAN ID VLAN ID VLAN ID Ethernet over MPLS (EoM) uses Tunnel Mechanism to Carry Layer 2 Ethernet Traffic EoM Encapsulate MAC Frame in MPLS Packet and Forward across MPLS Network For Resiliency use MPLS Protection T-MPLS 6

7 Ethernet PBT/PBB-TE PBB2 PBB1 Provider Backbone Bridge Network PBB3 PBB4 PB1 Provider Bridge Device Network PB2 Customer Sites Ethernet PBT = Deterministic Ethernet Distribute Bridging Tables using Control Plane No Spanning Tree PBT Trunk can Carry Many Type of Services Protection Path 7

8 Ethernet Services E-Line Service E-Line Service (Pt-to-Pt) Private Line Services Point-to-Point VPNs CE UNI MEN Point-to-Point EVC UNI CE E-LAN Service (Any-to-Any) Multipoint VPNs CE E-LAN Service UNI MEN UNI CE CE UNI UNI Multipoint-to-Multipoint EVC CE E-TREE Service (Pt-to-Multipoint) Rooted Multicast CE E-TREE Service UNI MEN CE UNI CE UNI Point-to-Multipoint EVC 8

9 Network Planning Process Field Active build Designs Network Operation Inventory Network Infrastructure Network Capacity Sales & Marketing Traffic Trend Forecasts, New Services, etc. Traffic Forecasts Network Network Resource Resource Planning Planning System System Network Design Plan, Design, & Build Process Suppliers Roadmap Lead times New Equipment Equipment Forecasts Suppliers 9

10 Ethernet Network Planning Challenges Converged service demand (with pt-pt, multi-point, and ptmultipoint services) Multiple technology deployed and its complexity Native Ethernet (Ethernet over SONET/SDH), Ethernet over MPLS, PBT/PBB-TE Protocols: STP/RSTP, MSTP, PVST.. Equipment functionality and complexity Issues: Accuracy in capturing service demand Complexity in configuration set-up and protocol sub-optimal use of network Logical configuration changes impact on balanced augmentation Lack of analysis of network in failure scenario worst case behavior of network capacity/utilization Evolving technologies Getting the right cost measure Consequence: Sub-optimal network build and augmentation 10

11 Ethernet Services and Layers Ethernet Services Enabled Service over Ethernet Ethernet Network Ethernet Routing & Connectivity Routing Transport Network Service Delivery Transport 11

12 Planning Native Ethernet Network Spanning Tree Based Ethernet Services Topology & Config. A B C D Input Service Demand (E-Line, E-LAN with Traffic Profile) F E Ethernet Network Topology & Logical Spanning Tree B C Configuration Routing and Design Augmentation A F E D Traffic Routing (STP/RSTP/PVST/MSTP) Design & Augmentation B C L2 Capacity Demand Transport Layer A D ( SONET/SDH/..) Planning VCG F E 12

13 Planning Ethernet over MPLS Ethernet Services Topology & Config. A B C D Input Service Demand (E-Line, E-LAN with Traffic Profile) F E Ethernet Network Topology & Label Switch Paths B C Configuration Routing and Design Augmentation A F E D Label Switch Path Protection Design & Augmentation B C L2 Capacity Demand Transport Layer A D ( SONET/SDH/..) Planning F E 13

14 Planning Ethernet PBB-TE Ethernet Services Topology & Config. A B C D Input Service Demand (E-Line, E-LAN with Traffic Profile) F E Ethernet Network Topology & PBT Trunk B C Configuration Routing and Design Augmentation A F E D Centralized Path connection (PBT Trunk) Protection Design & Augmentation B C L2 Capacity Demand Transport Layer A D ( SONET/SDH/..) Planning F E 14

15 Multi-layer Analysis Traffic Demand Service Impact Routed Traffic L2 Routing Failure Capacity Demand Diversity Analysis Transport Failure (Fiber Cut) 15

16 Ethernet Network Planning System Solving the Challenge Market Driven Network Build-out Based on service forecast and existing infrastructure Capacity/Bottleneck Analysis & Augmentation Strategy Equipment Model and Configuration Analyze Potential Capacity Bottleneck and provide Augmentation Strategy LoM (List of Materials) & BoM (Bill of Materials) Equipment forecast Multi-layer Failure and Impact analysis Analyze Network Behavior prior to Operation Layer Model Supporting Multiple Technologies Technology & Routing Complexity 16

17 What we Discussed Conclusion Carrier Ethernet Technology Options Ethernet Network Planning Challenges A Layer Approach for Ethernet Network Planning Handle Multiple Technology Options Multi-layer Failure and Diversity Analysis Q & A 17

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