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Layer 2 Solutions in Access Provider Networks Tuukka Järvi Layer 2 Solutions in Access Provider Networks Helsinki Metropolia University of Applied Sciences Master’s Degree Information Technology Master’s Thesis Date 05-05-2020 Abstract Author(s) Tuukka Järvi Title Layer 2 Solutions in Access Provider Networks Number of Pages 48 pages + 2 appendices Date 5 May 2020 Degree Master of Engineering Degree Programme Information Technology Specialization option Instructor(s) Janne Salonen, Principal Lecturer The thesis concentrates on Metro Ethernet and Carrier Ethernet solutions in Service Pro- vider and Access Provider networks. Ethernet has been in use in local area networks for more than 30 years. The success of Ethernet is based on its simplicity, ease of deployment, versatility, and low cost. Until the end of the 1900s Ethernet technologies were mainly re- stricted to LANs, but there were efforts to move from the mainstream LAN technology to metropolitan area network solutions. The next step in the evolution was to use Ethernet techniques in metropolitan area networks in the beginning of the 2000s. The Metropolitan Ethernet (Metro Ethernet) networks based on previous Ethernet standards are deployed in a metropolitan area. The successor of the Metropolitan Ethernet is Carrier Ethernet. It uses high-bandwidth Ethernet technology to create Internet access and communication between local area networks. Metro Ethernet and Carrier Ethernet can also be used to connect physically multiple locations to a network via an Ethernet Private Line. The driving force in the evolution is a vast increase of sites requir- ing fast and flexible services. Advantages of these implementations are lower cost of equip- ment and compatibility with customers’ equipment, that are based on Ethernet techniques. In this project the underlying telecommunications background, including protocols and con- ventions, is described shortly. Metro Ethernet and Carrier Ethernet technologies are repre- sented in detail, and two real-world cases are introduced, the emphasis being in Access Providers networks. The solutions are compared with legacy implementations, and benefits and limitations are discussed. Keywords Metro Ethernet, Carrier Ethernet, L2VPN, VPLS, MPLS Contents Abstract Abbreviations 1 Introduction 1 1.1 Background 1 1.2 Technology Problem 1 1.3 Object and Outcome 1 1.4 Project Methodology 2 1.5 Scope and Structure 2 2 Theoretical and Technical Framework 4 2.1 OSI and TCP Models 4 2.2 Ethernet 5 2.2.1 VLANs 7 2.3 Internet Protocol 8 2.3.1 Internet Protocol version 4 9 2.3.2 Internet Protocol version 6 11 2.4 TCP and UDP Protocols 13 2.5 MPLS 14 2.6 Metro Ethernet 16 2.7 Carrier Ethernet 18 3 Carrier Ethernet Networking Architectures 21 3.1 Carrier Ethernet 1.0 23 3.2 Carrier Ethernet 2.0 26 3.3 Service Attributes 30 3.4 Quality of Service, Bandwidth profiles and Traffic management 31 3.5 Service parameters 33 3.6 Service OAM 33 3.7 Ethernet over MPLS 34 4 Carrier Ethernet Example Cases 35 4.1 Case 1. An Ethernet-Based Layer 2 Circuit Connection 35 4.1.1 Equipment and interfaces 37 4.1.2 Configuring the L2circuit 37 4.1.3 Verifying the configuration 39 4.1.4 L2circuit connection experience and benefits 39 4.2 Case 2. Point-to-Multipoint Layer 2 VPLS 40 4.2.1 Equipment and interfaces 42 4.2.2 Configuring the Layer 2 VPLS 42 4.2.3 Verifying the configuration 43 4.2.4 VPLS connection experience and benefits 43 5 Discussion and Conclusions 45 References Appendices Appendix 1. Ethernet-Based Layer 2 Circuit Configuration. Appendix 2. Point-to-Multipoint Layer 2 VPLS Configuration Acknowledgements I would first like to thank my thesis advisor Principal Lecturer, Head of Department Janne Salonen of the Information Technology Department at Metropolia University of Applied Sci- ences. I also express my warm thanks to Mr. Markus Säkäjärvi for his support and guidance at DNA. Finally, I must express my very profound gratitude to my parents and to my spouse for provid- ing me with unfailing support and continuous encouragement throughout my years of study and through the process of researching and writing this thesis. This accomplishment would not have been possible without them. Thank you. Abbreviations ATM Asynchronous Transfer Mode BGP Border Gateway Protocol BWP Bandwidth profile CBS Committed Burst Size CCC Circuit Cross-Connect CE Customer Edge equipment CE 1.0 Carrier Ethernet 1.0 CE 2.0 Carrier Ethernet 2.0 CEN Carrier Ethernet Network CIDR Classless Inter-Domain Routing CIR Committed Information Rate CoS Class of Service CPE Customer Premises Equipment CVLAN C-VLAN, customer VLAN C-Tag Customer tag DEI Drop Eligibility Indicator DWDM Dense Wavelength Division Multiplexing E-Access Ethernet Access service type E-LAN Ethernet LAN service type E-Line Ethernet Line service type EBS Excess Burst Size EIR Excess Information Rate ENNI External Network-to-Network Interface EoMPLS Ethernet over MPLS EPL Ethernet Private Line service EP-LAN Ethernet Private LAN service EP-Tree Ethernet Private Tree service Ethernet Most widely used local area network technology E-Tree Ethernet Tree service type EVC Ethernet Virtual Connection EVPL Ethernet Virtual Private Line EVP-LAN Ethernet Virtual Private LAN service EVP-Tree Ethernet Virtual Private Tree service FPC Flexible PIC Concentrator FTTB Fiber To The Building G.SHDSL Symmetric High-Bitrate Digital Subscriber Loop IANA Internet Assigned Numbers Authority IEEE Institute of Electrical and Electronics Engineers IEEE 802.1ad QinQ or Q-in-Q, amendment to IEEE 802.1Q IEEE 802.1p Quality of service standard IEEE 802.1Q VLAN networking standard IEEE 802.3 Standard specification for Ethernet IETF Internet Engineering Task Force IPSec IP Security Architecture IPv4 Internet Protocol version 4 IPv6 Internet Protocol version 6 ISO International Organization for Standardization ITU-T International Telecommunication Union Standardization sector Juniper Juniper Networks, Inc. Junos OS Juniper Network Operating System Kompella BGP-based VPLS standard L2circuit Layer 2 Circuit L2VPN Layer 2 VPN LAN Local Area Network LDP Label Distribution Protocol LER Label Edge Router LSP Label Switched Path LSR Label Switching Router MAC Media Access Control MAN Metropolitan Area Network Martini VPN standard, L2circuit in Junos OS ME Metro Ethernet MEF Metro Ethernet Forum MEN Metro Ethernet Network MPLS Multiprotocol Label Switching MTU Maximum Transfer Unit OAM Operations, Administration and Maintenance OSI Model Open Systems Interconnection reference model OSPF Open Shortest Path First OUI Organization Unique Identifier OVC Operator Virtual Connection PCP Priority Code Point PDH Plesiochronous Digital Hierarchy PDU Protocol data unit PE Provider Edge router PIC Physical Interface Card Prefix Network portion of the address QinQ IEEE 802.1ad standard QoS Quality of Service RFC Request for Comments RSVP Resource Reservation Protocol SDH Synchronous Digital Hierarchy SLA Service Level Agreement SLO Service Level Objective SONET Synchronous Optical Network SVLAN S-VLAN, service VLAN identifier S-TAG Service tag TCP Transmission Control Protocol UDP User Datagram Protocol UNI User-Network Interface VLAN Virtual LAN VPLS Virtual Private LAN Service WAN Wide Area Network WDM Wavelength-Division Multiplexing 1 1 Introduction The thesis concentrates on Metro Ethernet and Carrier Ethernet solutions in service provider and access provider networks. Metro Ethernet, Carrier Ethernet and in the background resid- ing communications protocols are introduced, Carrier Ethernet services are described and two cases are represented and analyzed. 1.1 Background Ethernet has been in use in local area networks (LAN) for more than 30 years. The success of Ethernet is based on its simplicity, ease of deployment, versatility, and low cost. Until the end of the 1900s Ethernet technologies were mainly restricted to LANs, but there were efforts to move from the mainstream LAN technology to metropolitan area network solutions (MENs). From the early 2000s, Metro Ethernet and later Carrier Ethernet began gaining more popularity as a WAN technology. Metro Ethernet Forum, non-profit international industry con- sortium, started developing technical specifications for Metro Ethernet in 2001 and Carrier Ethernet in 2005. Later both ITU-T and IEEE have been collaborating with the standardisation and capability enhancement for Ethernet. Carrier Ethernet provides Internet access and communication between local area networks. In the beginning Carrier Ethernet and Metro Ethernet were used as synonyms. Although the functions of Metro Ethernet and Carrier Ethernet are similar, there are several differences. Metro Ethernet is intended for deployment in a metropolitan area and connect multiple loca- tions to a network. Carrier Ethernet is more enhanced and is intended for all network opera- tors. Its main advantages are lower in cost and speed compared with legacy technologies. 1.2 Technology Problem The theory and protocols of Carrier Ethernet will be expressed to build a solid knowledge base. Practical solutions as well equipment and the configuration of devices will be presented in detail, to help to close the gap between theory and real-world. 1.3 Object and Outcome In this project Carrier Ethernet solutions and the technical background will be introduced and two real-world cases are presented. The purpose of the thesis project includes the following: 2 • Present basic data communications protocols. • Describe briefly the solutions and architectures used in current networking solutions • Present the Metro Ethernet and Carrier Ethernet
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