Nortel Metro Ethernet Services Unit portfolio

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the reach of Carrier Ethernet services further out from the core and closer to customer access locations. This has driven the need for a new class of highly-reliable, remotely manageable, service-oriented Ethernet access devices to cost-effectively aggregate Ethernet services into this robust metro core. The Nortel family of Metro Ethernet Services Units (MESUs) offers a wide range of options for Ethernet services aggregation to address this need. The Metro Ethernet Services Unit family enables providers to offer high-bandwidth IP/Ethernet services with granular service assurance and superior operational simplicity to minimize ongoing OPEX. MESU delivers wire-speed performance along with the rate enforcement, classification, QoS/ prioritization and statistics collection features that are critical for the delivery of profitable Ethernet services, while addressing the SLAs required by end customers for all manner of services. Multiple deployment options and access resilience The Nortel family of Metro Ethernet Services Unit (MESU) platforms can support a variety of deployment models to suit applications for various access topologies (see Figure 1). The four modes of operation are: Layer 2 Switching, VLAN (QinQ) encapsulation, MESU Resilient Ring and stand-alone. In Layer 2 switch mode, the MESU functions as a standards-based, high-bandwidth access switch that provides Layer 2 operational services such as Layer 2 VLANs, IGMP, Spanning Tree and MLT. In VLAN Encapsulation mode, the ESU offers standards-based IEEE 802.1ad (QinQ) VLAN stacking to provide secure access to the network using the outer Q-tag for identifying and separating customer traffic onto separate VLANs. Figure 1. Metro Ethernet Services Unit deployment options 2 Residential Backhaul Mobile Backhaul DSLAM/CMTS EoBx EoSFP EoVDSL Stand-alone or QinQ mode access Layer 2 switch mode Up to 20 MESUs/Ring 10/100/1000 Ethernet access Outside Cabinet Multi-Link Trunk access Metro Ethernet Routing Switch 8600 Carrier Ethernet Metro Core (PBB/PBT) Dual-homed access 1GE/10GE Resilient Rings The MESU Resilient Ring mode offers industry-leading reliability with high efficiency aggregation using an Ethernetover-fiber solution. It allows for up to 20 ESUs to be connected on a fiber ring supporting sub 50ms protection capability, when homed to a Metro Ethernet Routing Switch (MERS) 8600, or a pair of MERS 8600s in a dual-homed configuration. MESU rings are available in GE configurations today with support for 10GE planned in the near future. Another advantage of the resilient ring architecture is the ability to optimize unused bandwidth when aggregating traffic into the metro core. Enterprise customers are demanding flexible service rates, typically at intervals lower than the full rate of the interface (e.g., 25 Mbps on a 100-Mbps port). If the access infrastructure is constructed in a pointto-point fashion, there is a greater likelihood that the Ethernet uplink from the Enterprise Access Core networks Metro Ethernet Service Units 1800/1850/1860/1880
CLE device to the central office device will be severely under-utilized. The Ethernet access ring capability enabled by the MESU series and the MERS 8600 provides an Ethernet aggregation network that efficiently utilizes the access ports for optimized infrastructure investment. The MESU portfolio supports an enhanced bi-directional dual-homed ring capability that further improves access resiliency and reduces single points of failure. In a dual-homed configuration, MESUs can be configured on a Resilient Ring that begins on one MERS 8600 and terminates on another MERS 8600, which could even be located in another physical location. This adds another level of resilience by providing equipment protection at the ring ‘headend’. In addition, since traffic can flow in either direction around the ring, this also improves the scalability and operational ease of managing dual-homed rings. Dual-homed rings are being introduced in the latest software release for MESU 1800/1850/1860 platforms, and are planned for the MESU 1880 in a subsequent release. Options are also available for providers with sites that cannot be supported on a resilient ring topology but would still like to have access resilience. For example, dual-homed uplinks to a pair of MERS 8600s can be supported in a Layer 2 switched or VLAN (QinQ) encapsulation mode from the MESU 1860/1880 platforms. Multiple classes of service and QoS support Service providers today seek top-line growth and must maximize revenue generation. The ability to deliver multiple services to each customer while leveraging the same infrastructure helps do just that. The MESU family allows Table 1. Metro Ethernet Services Unit features and benefits Feature Benefits Ethernet Access Ring Resiliency IEEE 802.1Q/p and IETF DiffServ VPN Continuity Check Packet classification Granular rate enforcement Network management RMON IGMP v1/v2 service providers to deliver more than just Ethernet connectivity service, e.g., ELINE/ELAN over the Metro Ethernet infrastructure. It enables providers to offer value-added services that enterprise customers are demanding. End customers can maintain the VLAN schemes used in their own networks, yet still access different services offered by the service provider — all enabled by the same Ethernet interface of the Metro Ethernet Services Unit. Simply put, service providers are able to leverage a lower- Enables ring-based deployment of Metro Ethernet Services Unit, achieving 50ms recovery in an Ethernet-over-fiber implementation; supports up to 20 nodes per access ring for efficient access aggregration and optional dual-homing into a MERS 8600 core. Enables the service provider to offer multiple classes of services, e.g. gold, silver and best effort, etc. and tiered services with appropriate prioritization. Couples with MERS 8600 to provide tools for performance monitoring, service assurance, SLA measurement and troubleshooting. Flexible classification based on: port, port + VLAN, port + VLAN + 802.1p bit, port + DSCP, and port + 802.1p combinations. Also support filtering based on source/destination IP address, TCP/UDP source/destination port and destination MAC address. Supports rate enforcement of Customer Information Rates (CIRs) and burst window sizes, where packets can be policed in user configurable 1-Mbps increments from 1 Mbps to line rate. Policing parameters can be set on various combinations, including: per port, per port per VLAN, per port per VLAN per 802.1p bit, per port per DSCP, and per port per 802.1p basis. Command Line Interface, RADIUS authentication and accounting, SNMPv1/v2 and management applications including: Java Device Manager, Product Service Provisioning, Metro Ethernet Management (MEM) system provide ease of management and flexibility to adapt to multiple operational environments and provide comprehensive Ethernet service provisioning, fault management and performance monitoring capabilities, including IEEE 802.1ag support. Supports four groups of RMON including Statistics, History, Alarms, Events from remote monitoring and operational simplicity. IP multicast support by examining (snooping) all IGMP traffic in hardware at line rate and pruning unwanted data stream from affecting network or end-station performance cost, shared network infrastructure across multiple customers and offer consistent services and SLAs. The MESU family supports packet classification based on IEEE 802.1Q/p and DiffServ Code Points which allows service providers to offer tiered services with QoS to end customers profitably. For example, the ability to classify traffic as early as possible helps ensure that mission-critical applications, such as VoIP and video, are given the level of 3
Page 1: Product Brief Nortel Metro Ethernet
Page 5 and 6: MESU 1860B Metro Ethernet Services
Page 7 and 8: Table 3. Metro Ethernet Services Un

Nortel Metro Ethernet Services Unit portfolio

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