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Carrier Days Carrier Ethernet: The Next Generation Network and Service Delivery Technology Ralph Santitoro Director of Carrier Ethernet Solutions [email protected] © Copyright 2008 Turin Networks, Inc. All Rights Reserved 24 April 2008 1 About Turin Networks A leading global provider of Carrier Ethernet solutions For wireline and wireless network operators Turin’s iConnect solutions address the real-world challenges of network operators To increase network efficiency and capacity To facilitate migration to Carrier Ethernet networks Solutions deployed by more than 600 customers worldwide including: Top five wireless network operators in U.S. 11 of the top 17 broadband Internet providers Headquartered in Petaluma, California R&D facilities in Boulder, Dallas, Boston, and Shanghai Sales offices throughout the world. www.TurinNetworks.com © Copyright 2008 Turin Networks, Inc. All Rights Reserved 2 Contents Network Segmentation Fundamental Ethernet service components Ethernet services and Ethernet access to IP services Comparison between Ethernet L2 VPNs and IP VPNs Why Ethernet L2 VPNs, EPL and EP-LAN services? Ethernet/IP service delivery over PDH access networks © Copyright 2008 Turin Networks, Inc. All Rights Reserved 3 Network Segmentation Metro Edge / Aggregation Network Access Networks • • • • • • Active Fiber PON HFC (Cable) PDH (E1/E3) DSL RAN (Wireless) IP Service Networks Internet ? Transport/Transmission Organization Voice IPTV IP VPN VoD Services Organization Access Networks All Layer 1 technologies. Technologies well defined and deployed IP Service Networks “Application/Service-aware” part of the network. Technologies well defined and deployed. All IP/MPLS Metro/Aggregation Network What networking technology should be used? Carrier Ethernet Networking Technologies have been defined to solve specific issues © Copyright 2008 Turin Networks, Inc. All Rights Reserved 4 Fundamental Ethernet Service Components UNI Access/Aggregation E-NNI Metro Transport / I-NNI Access/Aggregation UNI E-NNI Network Network Core Network EVC UNI (User-to-Network Interface) Physical interface/demarcation between service provider and subscriber Service start/end point NNI (Network-to-Network Interface) Demarcation/peering point Between service providers (E-NNI) Between service provider internal networks (I-NNI) Ethernet Virtual Connection (EVC) Logical representation of an Ethernet service Defined by association of 2 or more UNIs Ethernet service components are independent of the Access or Transport Network technology used to delivery the service © Copyright 2008 Turin Networks, Inc. All Rights Reserved 5 Example of Ethernet Service Delivery over Different Access/Transport Technologies Ethernet Service Provider UNI1 PDH (E1/T1) E-NNIAccess E-NNI Network Provider MPLS Transport Network I-NNI Fiber Access Network UNI2 10Mbps EVC PDH Access Network • EoPDH: 5 bonded E1s MPLS Transport Network • Ethernet over MPLS Fiber Access Network • Ethernet over Fiber (EoF) PDH Access/Aggregation Network UNI1: PDH access network bonds 5 E1s for 10Mbps EoPDH E-NNI: 1Gbps Ethernet over Fiber (802.1ad / QinQ) MPLS Transport Network 802.1ad frames mapped to MPLS transport network I-NNI: 1Gbps Ethernet over Fiber (802.1ad / QinQ) Fiber Access Network UNI2: 10Mbps Ethernet over Fiber (EoF) Subscriber is unaware of the various access and transport network technologies used to deliver this 10Mbps Ethernet Service © Copyright 2008 Turin Networks, Inc. All Rights Reserved 6 Comparison of Ethernet Connectivity Services and Ethernet Access to IP Services Ethernet Connectivity Services Multi-site E-LAN Ethernet Private LAN Transparent LAN Service (L2 VPN) VPLS (L2 VPN) Site-to-Site E-Line Ethernet Private Line Ethernet Virtual Private Line (L2 VPN) E-LAN E-Line Ethernet Access to IP Services Provide Layer 2 connectivity to IP Service Networks Ethernet access to Internet Ethernet access to Managed VoIP service Internet E-Line VoIP Ethernet Connectivity Service: Layer 2 Service End-to-End Ethernet Access to IP Service: Layer 2 access to IP Service © Copyright 2008 Turin Networks, Inc. All Rights Reserved 7 Technical Comparison of Ethernet L2 VPN and IP VPN Services in Access Network Ethernet L2 VPN Service • UNI • EVC (service) identified via VLAN ID • CoS identified via PCP • Forwarding on MAC or VLAN ID Service Attribute Customer Handoff Service Identification CoS Identification Packet/Frame Routing/Forwarding Fault Management Performance Management Service Provider IP VPN Service • Port • Service identified via IP address • CoS identified via DSCP • Forwarding on IP Address Ethernet Service Ethernet UNI VLAN ID / EVC PCP (or DSCP/ToS mapped to PCP) MAC Address (E-LAN) VLAN ID (E-Line) Link Trace, Continuity Check (L2 Ping), Loopbacks Frame Delay, Frame Delay Variation, Frame Loss Ratio, Service Availability IP Service Ethernet port (or PDH circuit) IP Address DSCP/ToS IP Address Traceroute, ICMP Ping Packet Delay, Packet Delay Variation, Packet Loss Fundamental difference between Ethernet and IP Services is the information used to identify, forward and process service frames © Copyright 2008 Turin Networks, Inc. All Rights Reserved 8 Why Ethernet L2 VPNs, EPL and EP-LAN services? - Improved Security Enterprises don’t want Carriers to know or route their IP addresses for site-to-site interconnections (VPNs) Ethernet enables Carrier’s network to transport and switch Enterprise IP traffic without interacting with it EPL and EP-LAN services over NG-SDH provides enhanced information security SDH’s circuit channelization coupled with LCAS diverse routes provide a data isolation and data ‘scrambling’ effect Ideally suited for Financial verticals such as stock exchanges, banks and government market sectors Mitigating Carrier Ethernet Security Risks: http://www.turinnetworks.com/html/TechBrief_Ethernet-Security.pdf © Copyright 2008 Turin Networks, Inc. All Rights Reserved 9 Why Carrier Ethernet for Metro/Aggregation Networks ? Metro/Aggregation Network’s Functionality Aggregate, switch and transport traffic from access network to IP service edge networks This capability is ideally suited for Carrier Ethernet Carrier Ethernet provides simpler and lower cost OAM than IP/MPLS Only need to manage 1 layer versus 3 Layers with IP/MPLS All performance and fault management accomplished via a single technology (Ethernet) Fault Management Performance Management IP MPLS 1 Layer to manage Ethernet Ethernet OpEx OpEx © Copyright 2008 Turin Networks, Inc. All Rights Reserved 3 Layers to Manage 10 Converged Ethernet/IP Service Delivery over PDH Access Networks © Copyright 2008 Turin Networks, Inc. All Rights Reserved 11 Delivering Ubiquitous Ethernet Services - The Access Network Challenge Ethernet over Fiber (EoF) access networks The optimal technology for delivery of Ethernet services Unfortunately, not all Enterprise sites have fiber access However, they all have access to copper PDH circuits Fiber Fiber (Off net) Fiber (On net) Ethernet Service Provider (Off net) Fiber (On net) How does a service provider deliver Ethernet services to all Enterprise locations? © Copyright 2008 Turin Networks, Inc. All Rights Reserved 12 What is Ethernet over PDH (EoPDH)? Technology that enables delivery of Ethernet services over PDH (E1/DS1, E3/DS3) access networks Service Bandwidth Granularity N x 2Mbps (N bonded E1s), N x 1.5Mbps (N bonded DS1s) N x 32Mbps (N bonded E3s), N x 45Mbps (N bonded DS3s) Example: 5 bonded E1s provide a 10Mbps Ethernet service 3 bonded E3s provides ~100Mbps Ethernet service Supports same service attributes as EoF services Ethernet UNI to subscriber Granular bandwidth and QoS per service Fault Management and Performance Management for SLAs EoPDH enables a common Ethernet service offering and SLA over both copper and fiber access networks PDH (Plesiochronous Digital Hierarchy): Term to collectively refer to E1/E3 and DS1/DS3 copper access network circuits © Copyright 2008 Turin Networks, Inc. All Rights Reserved 13 How does EoPDH work? Ethernet Frame at UNI Enterprise Subscriber Bonded E1s/E3s Copper PDH Access Network EoPDH CLE IP ETH IP ETH GFP S-VLAN Tagged Ethernet Frame (EVC) Channelized STM-n Ethernet Transport or IP Service Network EoPDH Aggregator IP ETH GFP IP ETH Ethernet Frames enter EoPDH CLE and encapsulated into GFP Each C-VLAN ID can be used to identify a different service (EVC) Access network multiplexes E1s/E3s into STM-n circuits E1s/E3s in STM-n circuits terminated on EoPDH Aggregator GFP terminated, Ethernet frames reconstructed EoPDH Aggregator adds S-VLAN tag (QinQ) and passes Ethernet Service Frames to Ethernet Transport Network or IP Service Network Preserves enterprise subscriber’s C-VLAN ID © Copyright 2008 Turin Networks, Inc. All Rights Reserved 14 Ethernet L2 Services and Ethernet Access to IP Services over E1s PDH circuits: PMO Customer Premise CE PDH/SDH Access Network EoPDH CLE SDH ADM Ethernet over E1s or E1s in STM-n Ethernet over E1s SDH Ethernet handoff to customer Local Switching Office (POP) TDM IP Service Edge PE Router L2 switch Ethernet PDH Aggregation Router Ethernet DCS SDH ADM Ethernet over E1s or E1s in STM-n TDM PDH circuits from Customer Premise to IP Service Edge © Copyright 2008 Turin Networks, Inc. All Rights Reserved 15 FMO Step 1 in Transport Network Evolution to Carrier Ethernet TDM Customer Premise CE PDH/SDH Access Network EoPDH CLE EoPDH Aggregator SDH ADM Ethernet over E1s or E1s in STMn IP Service Edge IP Service Edge PE Router Ethernet SDH Ethernet over E1s L2 switch Ethernet PDH Aggregation Router Ethernet PE Router DCS Ethernet over E1s or E1s in STM-n L2 switch SDH ADM Ethernet over SDH Carrier Ethernet Ethernet handoff to customer Local Switching Office (POP) Ethernet EoPDH aggregator terminates PDH/SDH circuits and provides Ethernet to backhaul network resulting in improved bandwidth utilization DCS and PDH Aggregation Router eliminated at IP Service Edge since PDH circuits terminated at LSO © Copyright 2008 Turin Networks, Inc. All Rights Reserved 16 FMO Step 2 in Transport Network Evolution to Carrier Ethernet TDM SDH ADM Ethernet handoff to customer Ethernet over E1s Converged Services • Ethernet L2 VPNs • EVPL and E-LAN • Ethernet access to Internet • Ethernet access to VoIP Ethernet over E1s or E1s in STMn Ethernet IP Service Edge PE Router L2 switch SDH ADM Local Switching Office (POP) Ethernet over SDH Carrier Ethernet EoPDH Aggregator SDH CE PDH/SDH Access Network Managed EoPDH CLE CLE Ethernet Customer Premise Ethernet SDH ADMs / Transport replaced by Ethernet Transport Shortest possible Ethernet over E1 (PDH) loops CLE at customer premise enables converged Ethernet and IP services Local switching of locally attached subscribers reduces backhaul bandwidth © Copyright 2008 Turin Networks, Inc. All Rights Reserved 17 Ethernet over PDH Benefits Simplifies Enterprise subscriber’s WAN connectivity Provides “IT friendly” Ethernet (UNI) instead of E1 TDM circuit Simplifies Provider’s Access/Aggregation Network Reduces backhaul bandwidth requirements By terminating TDM PDH circuits as close to subscriber as possible Through statistical multiplexing and local switching EoPDH enables ubiquitous, global Ethernet services for off-net subscribers © Copyright 2008 Turin Networks, Inc. All Rights Reserved 18 Summary Ethernet Services can be: Private Line Replacement (EPL) Private LAN (EP-LAN) Layer 2 Connectivity Service (E-Line or E-LAN L2 VPN) Layer 2 access connection to an IP Service (Internet, VoIP, etc.) Carrier Ethernet is the best technology to use in the metro/aggregation network Because this part of the network need not be “IP aware” Because it is simpler and lower cost than using IP/MPLS Carrier Ethernet and IP/MPLS can both have their place in the network Each plays a different role in the different parts of the network Carrier Ethernet enables the delivery of the broadest range of services while providing the lowest cost metro aggregation network infrastructure © Copyright 2008 Turin Networks, Inc. All Rights Reserved 19 Recommended Reading Metro Ethernet Services – A Technical Overview http://www.metroethernetforum.org/PDF_Documents/metro-ethernetservices.pdf Delivering Global Ethernet Services http://www.turinnetworks.com/html/TechBrief_Global-Ethernet.pdf Mitigating Carrier Ethernet Security Risks http://www.turinnetworks.com/html/TechBrief_Ethernet-Security.pdf Leveraging GMPLS to deliver end-to-end Ethernet services http://www.turinnetworks.com/html/TechBrief_Leveraging_GMPLS.pdf “Carrier Ethernet Deployment Faces Challenges, Opportunities” http://lw.pennnet.com/display_article/308790/13/ARTCL/none/none/Carri er-Ethernet-deployment-faces-challenges,-opportunities/ © Copyright 2008 Turin Networks, Inc. All Rights Reserved 20