1.13 Metro IP Solutions for Service Providers 1.13 Metro IP Solutions for Service Providers Jack Zambito

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1 1.13 Metro IP Solutions for Providers Metro IP Solutions for Providers Jack Zambito jzambito@cisco.com 2 Agenda Introduction Understanding Transport Considerations -based s The Enterprise Experience 3 1

2 SP So Many Terms, So Much Confusion The Provider World MPLS VPN VPLS DPT/RPR CWDM/ DWDM 802.1Q L2 Interworking SONET/ SDH EoMPLS Tag Stacking Choose the right technologies and features Understand what the provider will want to sell Understand what the enterprise will want to buy 4 Metro Technology Framework -Access s IP / MPLS Control Resilient Packet Ring SONET / SDH CWDM / DWDM Fiber Switched 5 Rules for Thinking About Metro Metro is/can 1. Provide interface to the service provider s customer 2. Complimentary to SONET and SDH 3. Inclusive of Cisco s routing platforms (Cisco 2600 to 12000) and optical platforms (ONS ) 4. Capable of allowing a provider to offer enhanced services (voice, video) 5. Can create a service offering a provider can make money from Metro is NOT 6. Necessarily about end-to-end 7. Synonymous with Transparent LAN s 8. About only switching 9. About a cheap service 10. About bandwidth-ondemand (although that s a component) 6 2

3 Metro End Customer Value Data Optimized Interface End Customer Owned Router / Layer 2 Switch / Host Fast User- Interface (UNI) Metro Router Port Costs 10 $ (Thousands) Familiar Gear, Familiar Protocol Lower Cost of Ownership 0 OC3 ATM Port Fast Port 7 Fiber Availability and Access In what room do you want me to put it? 8 Agenda Introduction Understanding Transport Considerations -based s The Enterprise Experience 9 3

4 Transport Options Incumbent vs. Dark Fiber Relay Relay Cisco Cisco End-to-End Dark Fiber (point-to-point) Relay Transparent LAN-optimized Effective for a small number of customers Redundancy has to be carefully planned due to Spanning Tree 3550 SONET ONS STM-16/ STM-64 service over an existing structured fiber plan Incumbent architecture Larger implementations Cisco 7600 Cisco ONS Build-in resiliency scheme (UPSR, BLSR) can eliminate Spanning Tree 10 Here s What a Provider Wants to Do Provider wants to offer access to customers Considering point to point fiber to each customer using switching as the backhaul and aggregation However 11 And Here s What a Provider is Stuck With fiber plant doesn t run in straight lines. More fiber required to follow streets, highways, ducts, etc. And how does that scale to offer service to more customers? 12 4

5 Fiber Plant Ring-based Installation To scale access to the customer base, providers will use fiber rings. To scale capacity, providers will run many cores in the duct To scale bandwidth, providers will use DWDM or CWDM To scale efficiency, providers will use SONET/SDH 13 Metro Hierarchy Inter Office Metro/Regional 200km, OC- 192/10GE/STM- 64, Multi CO/POP Access Collector km, 2.5 Gb & 10 Gb mix SONET/SDH is existing transport Discussion w/ SP must include best utilization of existing infrastructure CPE Access Rings km Aggregation 14 Transport Architecture, DPT, SONET/SDH and DWDM DWDM scale fiber infrastructure SONET/SDH maintaining investment protection Storage TDM PL GigE PL Wavelength DPT/RPR IP/MPLS optimized ring L2/L3 VPN topology VoIP Internet Access L2/L3 VPN VoIP Internet Access Resedential V/V/D low cost hub-and-spoke or rings 15 5

6 Economics Industry Wide vs. Legacy SONET/SDH Port Pricing $/Gigabit Bandwidth $35,000 $/Gigabit of Bandwidth $30,000 $25,000 $20,000 $15,000 $10,000 $5,000 $- OC -192/STM -64 OC -48/STM -16 OC -12/STM -4 OC -3/STM GigE GigE FastE Assumptions: Average Metro Access and Metro Core per port pricing. Source: Strategy Partners and Metro Forum, Different Rings Solve Different Problems SONET/SDH Switched using Spanning Tree Protocol DWDM and SDH Backbone OC-N STM1/4/16/64 Business STM1/4/16/64 Metropolitan STM-N STM-N Metro POP DPT/RPR DWDM/CWDM 17 over DWDM 10x100BT ONS GigE l 1 ONS NxGigE 10x100BT GigE ONS l 2 DWDM via ONS or ONS provides 16 and 32 lambdas, respectively delivery for service providers with limited fiber availability or budget for fiber Convergence at 50 ms 18 6

7 CWDM GBICs Multiple l Passive CWDM MUX (Head end) 2/1 0/2 0/1 Single l Passive CWDM MUX 2/2 East Facing GBIC West Facing GBIC 20nm Coarse WDM Grid, Non-Amplifiable CWDM GBICs plug into Switches and Routers Up to 8 lambdas Etherchannel and Layer 3 equal cost routing can be used for protection Supported Platforms: Cisco 7600, 6500, 4000, 3550, ONS 154XX, 153XX 19 over SONET/SDH Transparent, Line-Rate GE ONS L3 IP Trunk EoMPLS to MPLS P 802.1Q Trunk OC192/STM-64 SONET/SDH RING Logical hub-and-spoke network over a physical ringbased network Use interfaces in SONET/SDH platforms SONET/SDH transparent to Layer 2/3 overlay 20 Dynamic Packet Transport (DPT) Eliminates SONET/SDH equipment for IP transport while retaining resilience benefits Intelligent Protection Switching (IPS) provide fast ring restoration (< 50ms) Minimize provisioning configuration and maintenance requirements Based on SRP (Spatial Reuse Protocol) DPT Ring Dual Working 21 7

8 Cisco Metropolitan IP Systems Extend Internet WAN into the Regional Metro Cable Internet s Cisco Series Regional Metro IP Regional Metro Local CO SONET/SDH ATM/Frame Internet s Dial/DSL Internet s Metro Access Customer Premise Expand Internet footprint Bypass traditional TDM infrastructure Achieve greater operational efficiencies 22 Cisco Metropolitan IP Systems Extend Internet WAN into the Metro Access Cisco Series Regional Metro IP Metro IP Access Multi- Tenant Unit Cisco Series Regional Metro Local CO Multi- Dwelling Unit Metro Access Direct 10/100/1Gbps Access Customer Premise Expand Internet footprint to the edge Preserve Internet dimensioning, functionality and management planes 23 Topology Considerations Ring or Hub and Spoke? Metro POP Significant performance and failover characteristics Tune 802.1d wherever possible 24 8

9 Comparison of Ring Technologies SONET/SDH Installed base in service providers Evolutionary approach for the service providers vs. revolutionary Best choice for large scale deployments Best use of fiber infrastructure Hierarchical bandwidth Best fiber utilization for dual homing Next-gen SONET, with VCAT, LCAS, GFP, will help optimize SONET for data 50 ms convergence DPT/RPR Shared packet ring scales bandwidth up to 5 Gbps SONET framing provides insertion point for many providers Spatial reuse provides good bandwidth utilization Optimized for Layer 3 (currently) Large number of nodes (128) per ring 50 ms convergence Switched using Spanning Tree Low cost solution over dark fiber Perceived simplicity of switching Fairness, bandwidth, delay/jitter dependant on location on the ring node limit LAN switch as edge device (no MPLS, Traffic shaping, BGP, etc) 1-50 seconds convergence (standard 802.1d or 802.1w) CWDM Guaranteed bandwidth per lambda up to 8 nodes Logical star over a physical ring EtherChannel or Layer 3 load balancing for redundancy 200 millisecond failover More consistent delay/jitter and better access onto the ring Still a low-cost switch at edge 25 Agenda Introduction Understanding Transport Considerations -based s The Enterprise Experience 26 Portfolio Layer 2 s High Bandwidth Point-to-Point Point-to-Point VLAN-based TLS (similar to FR/ATM - ERS) Point-to-Point Port-based TLS (similar to Leased Line - EWS) Multipoint-to-Multipoint QinQ Multipoint with L2 Backbone Multipoint VLAN-based with MPLS Backbone (VPLS) Multipoint Port-based with MPLS Backbone (VPLS) Layer 3 s MPLS VPN Interconnection 27 9

10 Summary of -based s -Based s Layer 1 Layer 2 Layer 3 Point-to-Point Multipoint Private Line Relay Wire Multipoint MPLS VPN Transparent LAN Similar to ERS only w/ VLAN transparency Analogous to Frame Relay Analogous to Private Line 28 Terminology CE PE-CLE PE-POPPOP PE CE Core Distributed PE Virtual Circuit (EVC) UNI CE Customer Equipment UNI PE Provider Edge PE-CLE Provider Edge Customer Located Equipment PE-POPPOP Provider Edge Point of Presence UNI User Interface CE-VLAN VLAN (tag) between CE and UNI PE-VLAN VLAN (tag) within Provide 29 Basic Terms Types of Virtual Circuit Connectivity Point-to-Point Multipoint -to-multipoint LEAF Point-to-Multipoint ROOT LEAF 30 10

11 L2 VPN Basics Virtual Connection (EVC) Point-to-Point Exactly two UNIs are associated. An ingress frame at one UNI can only be an egress frame at the other UNI. Defined by IETF as Virtual Private Wire VPWS Virtual Private Wire Multipoint Two or more UNIs are associated. An ingress frame at one of the UNIs can be an egress frame at one or more of the other UNIs. Defined by IETF as Virtual Private LAN VPLS Virtual Private LAN 31 L2 VPN Point-to-Point Virtual Connection (EVC) Point-to-Point Multipoint Private Line Equivalent Frame Relay Equivalent Port-based (Non-Multiplexed UNI) SP C VLAN-based Multiplexed UNI SP C A A B B Physical Port to Physical Port Good Fit for Switches and Routers Logical Port to Logical Port Good Fit for Routers Dangerous for Switches (no L2 PDU transport) 32 L2 VPN Multipoint Virtual Connection (EVC) Point-to-Point Multipoint Could support Multiplexed and Non-Multiplexed UNIs SP cloud must perform: MAC address learning/aging Forwarding and packet replication Good Fit for CE Switches and Routers Transparent or Non-Multiplexed SP UNI Non-Transparent or Multiplexed 33 11

12 L2 VPN Multipoint Virtual Connection (EVC) Point-to-Point Multipoint Does it really meet customer demand? most enterprise WAN networks are P2P using routers as CPEs Some TLS facts from US SP customers: Majority of their customers are P2P Majority of their customers have only two MAC addresses facing the SP (i.e. CPE are routers) MP2MP customers have an average of 5 sites? 34 Multiple Names one meaning Tying It Together EVCS Virtual Circuit VPLS Virtual Private LAN TLS Transparent LAN VPWS Virtual Private Wire EVPL Virtual Private Line DVS Directed VLAN H-VPLS Hierarchical Virtual Private LAN EPLn Private LAN ERS Relay PW Pseudo Wire EWS Wire 35 What is VPLS? A Virtual Private LAN s (VPLS) is a multipoint Layer 2 VPN that connects two or more customer devices using bridging techniques VPLS is an ARCHITECTURE defined within IETF Draft-lasserre-vkompella-ppvpn-vpls-02.txt A VPLS emulates an Switch 36 12

13 VPLS Often referred to as a Transparent LAN (TLS) Provider cloud appears to be a switch, with UNI supporting VLAN transparency The service provider cloud will switch based on (the enterprise s) MAC addresses 37 VPLS System An Example CE1 Attachment VC Single-PE architecture shown Distributed-PE architecture (H-VPLS) MAC Learning VSI PE VSI CE2 Pseudo Wires Cisco Ans.: limit MAC learning per VLAN/VSI Packet Replication Key Components: PE VSI VSI - Virtual Switch Instance PE Auto Discovery Auto Configuration CE3 38 Virtual Private Wire (VPWS) Pseudo Wire (PW) PW End (PWES) IP or MPLS Backbone Customer Edge (CE) PE PSN Tunnel L2 Provide Edge (PE) L2 CPE Router Virtual Private Wire = VPWS L2transport over IP = L2TPv3/UTI L2transport over MPLS = AToM CPE Router 39 13

14 The Relay (ERS) Non-Multiplexed Interface Multiplexed Interface 20 Mbps T1 Remote Office 1 T3 20 Mbps T1 Remote Office 2 multiplexing allows single port to provide service to multiple end-points (referred to as point-to-multipoint) EVC identified by the VLAN CE-VLAN must be the same as SP-VLAN analogous to Frame Relay, functionally, it is the same encourages a router as CE edge device, not a switch (except for remote site) ERS allows interworking with FR/ATM (future) 10 Mbps T1 Access Remote Office 3 40 Interworking between and ATM/FR to Frame/ATM Interworking: Seamless transition and in-service migration from present services Remote Office Mbps Provider Metro 256 Kb Frame Relay- Connected Branches Remote Office 2 Regional Headquarters Inter-working capability 256 Kb 10 Mbps Remote Office 3 - Connected Branch 41 Point-to-Point VLAN-based TLS (ERS) Frame Relay / ATM Equivalent Router Router SP Router 42 14

15 Point-to-Point VLAN-based TLS (ERS) Frame Relay / ATM Equivalent Router CE VLAN 3 CE VLAN 4.1Q Trunk Edge... Distribution Distribution... PE VLAN 3 VC8 VC4 Carries VLAN 3 PE VLAN 3 PE VLAN 4 MPLS LSPs / L2TPv3 PE VLAN 2.1Q.1Q VC6 Trunk Trunk SP MPLS / IP SP VC2 Ca rries VLAN 4 MPLS LSP s / L2TPv3 Car ri es VLAN 2 Distribution VC9 PE VLAN 2 Edge... CE VLAN 3 CE VLAN 2.1Q Trunk Router Edge... CE VLAN 2 Edge: 3550, 4500, 6500 Distribution: 7600, 10720, VC7 PE VLAN 4.1Q Trunk CE VLAN 4.1Q Trunk Router 43 Life of a Packet ERS example SP MPLS PE-CLE... PE-POP... CORE PE-POP PE-CLE... CE1 CE2 CE VLAN 1703 PE VLAN Q Trunk.1Q Trunk VC 1718 VC LSP Tunnel LSPs VC 1518 PE VLAN Q Trunk CE VLAN Q Trunk 1 6 Destination MAC B4 Type 8100 Source MAC B1 P 0 Vlan 6A7 Type 0800 (IP) 1 6 Destination MAC B4 Source MAC B1 Type P Vlan Type 8100 A 6A (IP) 1 6 SP Destination MAC FD 1E C9 00 SP Source MAC D9 BA 0A Type Out Label Ex AFE In Label Exp DMAC 005EE B DMAC SMAC B SMAC B1 Type SP Destination MAC DF 7F 8A SP Source MAC FD 1E C9 80 Type In Label Exp EE BFD Destination MAC B4 Type 0800 Source MAC B1 1 6 Destination MAC B4 Type 8100 Source MAC B1 P A Vlan 5DF Type 0800 (IP) 1 6 Destination MAC B4 Source MAC B1 Type P Vlan Type DF 0800 (IP) CE - FCS 4 Bytes CE - FCS 4 Bytes SP - FCS 4 Bytes SP - FCS 4 Bytes CE - FCS 4 Bytes CE - FCS 4 Bytes Length = 1200 Bytes (w/o FCS) Length = 1200 Bytes (w/o FCS) Length = 1218 Bytes (w/o FCS) Length = 1214 Bytes (w/o FCS) Length = 1200 Bytes (w/o FCS) Length = 1200 Bytes (w/o FCS) 44 The Wire (EWS) int faste 0/1 int faste 4/0 T3 Analogous to a private line in that all data transverses, unaltered across the EVC Port-to-Port mapping, no service multiplexing allowed. Therefore all services must exist on one port (All-to-One Bundling) Switches or routers can be deployed as CE edge devices VLANs Remote Office 2 VLANs

16 Point-to-Point Port-based TLS (EWS) Leased Line Equivalent Switch Switch SP 46 Point-to-Point Port-based TLS (EWS) Leased Line Equivalent Edge Distribution SP MPLS / IP Distribution Edge Switch CE VLAN 1 PE CE VLAN 4 VLAN 2 CE VLAN 3 QinQ Access VC65 Carries VC LSPs CE VLANs MPLS LSPs / L2TPv3 VC51 PE VLAN 7 CE VLAN 1 CE VLAN 4 CE VLAN 3 QinQ Access Switch SP Edge: 3550, 4500, 6500 Distribution: 7600, 10720, Life of a Packet EWS example SP MPLS MAC: B2 CE1 PE-CLE... PE-POP... CORE PE-POP PE-CLE... MAC: B6 CE2 CE VLAN 100 PE CE VLAN 101 VLAN 1710 CE VLAN 102 QinQ Access PE VLAN Q Trunk VC 1725 VC LSP Tunnel LSPs VC 1525 PE VLAN Q Trunk PE CE VLAN 100 VLAN CE VLAN CE VLAN 102 QinQ Access 1 6 Destination MAC B6 Source MAC B2 Type P Vlan Type (IP) CE - FCS 4 Bytes Length = 1200 Bytes (w/o FCS) 1 6 Destination MAC B6 Source MAC B2 Type P Vlan Type AE 8100 P Vlan Type (IP) FCS 2 Bytes FCS 2 Bytes Length = 1204 Bytes (w/o FCS) 1 6 SP Destination MAC FD 1E C9 00 SP Source MAC D9 BA 0A Type Out Label In Label Exp 005F5 502 DMAC B6 P 0 SMAC B2 Vlan Type Ex 4FE DMAC SMAC Type 8100 FCS 2 Bytes FCS 2 Bytes Length = 1222 Bytes (w/o FCS) 1 6 SP Destination MAC DF 7F 8A SP Source MAC FD 1E C9 80 Type In Label Exp F5 5FD Destination MAC B6 Source MAC B2 Type P Vlan Type SP - FCS 4 Bytes Length = 1218 Bytes (w/o FCS) 1 6 Destination MAC B6 Type 8100 P Vlan Source MAC B2 P Vlan 4 5E6 Type 0800 (IP) Type 8100 FCS 2 Bytes FCS 2 Bytes Length = 1204 Bytes (w/o FCS) 1 6 Destination MAC B6 Source MAC B2 Type P Vlan Type (IP) CE - FCS 4 Bytes Length = 1200 Bytes (w/o FCS) 48 16

17 Access into an MPLS VPN 1 Option 1 Routed connection with MPLS to the edge Remote Office 2 Option 2 VLAN to VRF Mapping VPN -A VPN -A Remote Office 2 VPN -B VPN -B ERS MPLS VPN ERS Remote Office 2 49 Access into an MPLS VPN 2 Option 3 VLAN to VRF Mapping (Layer 3 Forwarding instance) VPN -A VPN -A Remote Office 2 VPN -B VPN -B ERS W/ L3 Intelligence MPLS VPN ERS W/ L3 Intelligence Remote Office 2 Separate routing instance per customer No MPLS required at the network edge 50 Point-to-Point L3 and MPLS/VPN Access Distribution Edge... CE VLAN 3 VRFs (Availble for EoMPLS s) VRF PE VLAN 3 Red RD for VRF Red RD for VRF Green MPLS PE Router Intranet Router CE VLAN 4.1Q Trunk.1Q Trunk VRF PE VLAN 4 Green (Internet) MPLS LSPs RD for VRF Green MPLS LSPs SP Phys SP MPLS MPLS PE Router Internet Edge: 3550, 4500, 6500 Distribution: 7600, 10720,

18 s to Product Mapping -Based s Layer 1 Layer 2 Layer 3 Point-to-Point Multipoint Private Line Relay Wire Multipoint MPLS VPN ONS ONS CWDM Cisco Cisco Cisco 7600 Cisco Routers 52 Customer Examples 53 Metro Landscape Diversity Cisco Delivers Solutions for Broad Customer Requirements Cisco 2002, Draft_ Cisco Systems, CONFIDENTIAL Inc. All rights reserved

19 Cisco Metro Solutions: Telstra Hundreds of large Enterprise customers on the network MPLS Core DPT Cisco Series TLS CWDM GE 6500 Series IP VPN GE Bandwidth-on- Demand from 4Mbps to 1Gbps L3 s 3550/ Cisco Metro Solutions: FastWeb Over 100,000+ signed subscribers and 900,000 homes passed SS7 PSTN V Video SVR Video Content Voice Internet Access Video Mbps Residential Internet Access w/ Voice and VoD SMB bundles 2950/ / Cisco Metro Solutions: Sprint International 200 Mbps Transit Internet Access Deliver Carrier-grade SLA with sub-50ms network restoration Cisco Access 10M to 100M 57 19

20 Cisco Metro Solutions: Dubai Internet City One network for Voice, Video, Data and Security s Cisco Voice Internet Access Security Video Cisco Metro Solutions: AT&T Connects 68 US cities carrying live traffic! ONS ONS Private Line Internet Voice Data Video Next Generation Intelligent Optical Automatic Provisioning and Restoration Multi-service over SONET ONS Cisco Metro Solutions: Cox Communications Interconnection of Cable hubs and Data Centers. 750,000 subs ONS UBR7200 ONS High Speed Internet VPN s Web Hosting s Content Delivery 60 20

21 Cisco Metro Solutions: Hong Kong Broadband Over 145,000 signed subscribers 1,000,000 homes passed Cisco Internet Core GE GE GE GE 6500 LMDS (OC3) 10 Mbps Residential Internet Access Local Telephony Expanding services to Businesses Merci N oubliez pas de remplir votre formulaire d évaluation