Maximizing Revenue Opportunities with Converged IP Services over Ethernet Transport

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1 Extreme Networks Carrier Ethernet Transport Solution Overview Maximizing Revenue Opportunities with Converged IP Services over Ethernet Transport Carriers all over the world are facing explosive demand for bandwidth, driven by residential triple-play, business Ethernet, mobile backhaul, and wholesale Ethernet services. In an effort to keep up with demand, they are deploying next generation networks that provide converged IP services over a common Ethernet transport infrastructure. Converging IP services over a common transport network, however, increases operational complexity. With potentially hundreds of thousands of subscribers with varying service requirements, the complexity of provisioning, troubleshooting, and maximizing network efficiency increases significantly. Meanwhile, both residential and business subscribers are constantly on the lookout for new services that offer them the best possible value. With intensified competition, carriers must differentiate themselves by rapidly deploying new, compelling services and creating the best possible subscriber experience. These challenges drive the carriers requirement for high-performance Ethernet Transport solutions that are more affordable, simpler to operate and flexible enough to meet the rapidly changing requirements of the industry. Extreme Networks offers a broad portfolio of high-performance Carrier Ethernet Transport solutions which provide the flexibility that service providers need to meet the growing demand for IP and Ethernet services within budget while offering room for growth without major reinvestments. Ethernet Transport s simplification of the network yields significant savings in both capital expenses (CapEx) and operational expenses (OpEx) by requiring less equipment to aggregate traffic from more services as well as simplifying the operational model. Extreme Networks Carrier Ethernet Transport solutions enable carriers to monetize their networks by shifting from reactive circuit monitoring to proactive service management. Key Benefits of Extreme Networks Carrier Ethernet Solutions Increase Network Longevity Powerful Ethernet Transport solutions designed for carriers delivering residential triple-play, business Ethernet, mobile backhaul, and wholesale Ethernet services over a common transport network Wide range of high-performance 10 GbE and 100 GbE-ready Ethernet Transport systems built to support the explosive video traffic demand Simplified service engineering that maximizes network efficiency Lower Operational Expenses with Easy-to-Operate Next-Generation Networks Point-and-click service provisioning that significantly reduces operator errors during service roll-outs Lower annual maintenance expenses due to reduced number of network elements, lower service contract cost, and lower power and space requirements Enhance Subscriber Experience with Proactive Service Management Industry-leading resilient Ethernet ring protocol for service continuity Service management software with visual service monitoring for simplified troubleshooting Industry standard Ethernet OA&M to accelerate resolution to service problems

2 Carrier Ethernet Services Extreme Networks Carrier Ethernet Transport Solution Overview Increase Cost Savings with Residential and Business Services over Ethernet Transport Aggregating residential triple play, Metro Ethernet Forum (MEF)-certified business Ethernet, Ethernet mobile backhaul and wholesale Ethernet services on a common Ethernet transport network allows carriers to get the most out of their investment in Ethernet infrastructure. Rather than deploying separate overlay networks to handle each service, the migration to Ethernet Transport allows network operators to deploy a common transport network to deliver an array of IP services today with the capacity to offer more services in the future. Simplified operations coupled with powerful service monitoring and control provide differentiated services and superior subscriber experience. CapEx savings can arise from better utilization of equipment, and when properly managed, a single converged Ethernet Transport network yields OpEx savings as well. Residential Triple-Play Services Residential triple-play services bundle video, voice over IP, and high-speed Internet access over a converged network, eliminating the expense of building multiple overlay networks to provide these services to the end user. Advanced services such as high-definition broadcasts, video-on-demand, and network-hosted digital video recording quickly drive bandwidth capacity requirements on access rings to 10 Gbps. Softswitch deployments that empower VoIP and IP Centrex solutions look to Ethernet interfaces for next-generation deployments. Business Ethernet Services Traditional T1/E1 TDM and SONET/SDH point-to-point services no longer provide the price and performance business customers expect as they upgrade their data centers and connect their enterprises. New business Ethernet services defined by the MEF have emerged that deliver more bandwidth at a lower cost. These new business Ethernet services were designed to capture the features that helped frame relay to become so popular (including fractional rate services and committed information rates) while allowing user-network-interface (UNI) speeds to advance up to 10 Gbps today and 100 Gbps in the future. The MEF defines two service types to address the business market: E-Line and E-LAN services. E-Line services are point-to-point Ethernet services which replace expensive TDM leased lines and point-to-point frame relay with a higher bandwidth, lower cost solution. E-Line services include Ethernet Private Line (EPL) services with dedicated point-to-point bandwidth commitments, and Ethernet Virtual Private Line (EVPL) services with shared point-to-point bandwidth. E-LAN services are multipoint Ethernet services which replace multipoint frame relay or Asynchronous Transfer Mode (ATM) services with a higher bandwidth, lower cost-per-bit solution. Ethernet Mobile Backhaul Services As data services grow increasingly prevalent on mobile devices, the demand for bandwidth is rapidly exceeding the capacity of T1/E1 TDM mobile backhaul services. Newer mobile technologies like LTE and WiMAX use Ethernet for mobile backhaul. Together these trends are driving forecasts of explosive growth in Ethernet mobile backhaul services. Ethernet mobile backhaul services drive stringent requirements for timing and synchronization that are enabled by hierarchical quality of service. Wholesale Ethernet Services Local carriers sell wholesale Ethernet access services to global service providers, allowing these global carriers to provide end-to-end services to their subscribers around the world. A good example is when a business subscriber whose branch offices are dispersed throughout many different regions would like to purchase a business E-LAN service from a global carrier. Since the E-LAN service must span across multiple regions, the global carrier must purchase Ethernet access lines from various local carriers in order to provide the end-to-end E-LAN service. A key feature is the Ethernet Network-to-Network Interface (E-NNI) which serves as the demarcation point between the different carriers Extreme Networks, Inc. All rights reserved. Carrier Ethernet Transport Solution Overview Page 2

3 Extreme Networks Carrier Ethernet Transport Solution Overview Carrier Ethernet Transport Reference Architecture Carriers delivering residential triple play, business Ethernet, mobile backhaul, and wholesale Ethernet services look to Ethernet Transport to reliably deliver subscriber traffic to and from the IP services core. Extreme Networks Carrier Ethernet Transport Reference Architecture provides a set of easily managed building blocks that allow a graceful transition to next-generation networks, and a clear path to scaling service delivery for future high-bandwidth services. The primary building block in the Carrier Ethernet Transport Reference Architecture is the 10 Gigabit Ethernet Access ring (see Figure 1). Next-generation Ethernet Transport networks reuse many elements from earlier SONET/SDH network architectures, including resilient fiber rings for access, and stacked rings for metro aggregation. Carrier Ethernet Transport networks are composed of switching equipment located at the Subscriber, Ethernet Access central office, and Access Aggregation central office. Figure 1. Carrier Ethernet Transport Reference Architecture Subscriber The choice of customer premises equipment (CPE) varies with the type of access and speed of service. For residential triple play there are typically two alternative approaches: active Ethernet and passive optical networking (PON). Active Ethernet provides high-bandwidth premium services to single-family and multi-tenant dwellings, relying on an Ethernet switch for CPE. Alternatively, when fiber assets are scarce and subscriber data rates are lower, PON access may be preferred. PON uses an optical network termination (ONT) device to deliver services to the subscriber. Extreme Networks provides active Ethernet solutions and works with global partners for PON solutions. For business Ethernet services, multi-tenant subscribers are served by an Ethernet Transport switch placed in a multi-tenant unit wiring closet to serve all the tenants in a building. Larger businesses are served directly from the Ethernet Transport switch in the Ethernet Access central office. In both cases, the business subscriber CPE is an Ethernet switch. It may be owned and managed by the carrier or provided by the subscriber. For Ethernet mobile backhaul services, Ethernet Transport switches are deployed at the mobile radio tower Extreme Networks, Inc. All rights reserved. Carrier Ethernet Transport Solution Overview Page 3

4 Extreme Networks Carrier Ethernet Transport Solution Overview Ethernet Access Ethernet Access provides the first level of aggregation in the Carrier Ethernet Transport Reference Architecture. 10 GbE Access Rings collect traffic from Ethernet Access central offices and aggregate the traffic at the Access Aggregation central office. In each Ethernet Access central office, an Ethernet Transport switch serves the subscriber Ethernet access link. In the case of PON for residential services, the PON optical line terminal (OLT) resides in the Ethernet Access central office and aggregates traffic over GbE and 10 GbE links to the Ethernet Transport switch. Multiple Ethernet Access central offices share one or more 10G Ethernet Access rings for connectivity back to the Access Aggregation central office. Ethernet Access networks are provisioned as resilient Ethernet rings to take advantage of existing investment in SONET/SDH fiber topologies and business processes. Since SONET/SDH fiber deployments are in rings, the resilient Ethernet access ring allows reuse of existing fiber routes. Ring topologies have long been understood to provide superior resiliency compared with mesh or hub-and-spoke architectures given the cost of deploying fiber relative to the cost of the switching equipment. Ethernet Aggregation Ethernet Aggregation provides the next level of scale in the Carrier Ethernet Transport Reference Architecture. Each Ethernet Aggregation central office serves up to 64 line-rate 10G Ethernet access rings. Access Aggregation central offices connect directly with or co-locate at the carrier data center, providing high-speed access to content and global connectivity. For larger deployments, multiple Access Aggregation central offices are linked via multiple 10G Ethernet Aggregation rings to the metro core central office (see Application 2). The Ethernet Transport switch at the metro core provides high-density 10 GbE connectivity between access aggregation central offices. Over time, the Ethernet Aggregation portion of the network is the most likely target for eventual upgrades to 100 GbE. Extreme Networks Ethernet Automatic Protection Switching protocol (EAPS, RFC 3619) is an industryleading resilient Ethernet ring protocol, deployed on thousands of rings in carrier networks around the world. Thanks to over seven years of experience in carrier networks, EAPS provides advanced support for resilient Ethernet rings not found in alternative approaches including subtended rings, dual-node interconnect, and spatial reuse. EAPS enables service continuity across alternate routes when a link in a ring fails Extreme Networks, Inc. All rights reserved. Carrier Ethernet Transport Solution Overview Page 4

5 Extreme Networks Carrier Ethernet Transport Solution Overview Extreme Networks Carrier Ethernet Transport Solutions Summit and BlackDiamond Ethernet Transport Switches Extreme Networks fixed-configuration Summit and modular BlackDiamond Ethernet Transport switches enable carriers to deploy next-generation networks that gracefully expand the number of high-bandwidth services offered to their subscribers while enhancing their subscribers experience with a network optimized for operational simplicity. The BlackDiamond series delivers superior system capacity with up to 64 line-rate 10 GbE ports in a single chassis that is 100 GbE ready. These high-performance switches deliver more services to more subscribers, resulting in a network with fewer elements that costs less to operate. The Summit family of switches are fixedconfiguration 1RU switches supporting 10/100/1000 Mbps to 10 GbE line-rates and are ideal for Ethernet access, Access Aggregation, or Customer Premises Equipment depending on the type of deployment. All Extreme Networks Ethernet Transport switches share the same software foundation, the ExtremeXOS operating system. A common operating system for the entire network greatly simplifies management and operations. The modular architecture of ExtremeXOS also provides outstanding service availability. Extreme Networks Ethernet Transport switches are MEF-certified and USDA RUS accepted as shown in Figure 2. Ridgeline Service Advisor Extreme Networks Ridgeline Service Advisor is service management software designed to accelerate revenue, enhance subscriber experience, and maximize network efficiency. Features include point-and-click provisioning that significantly reduces operator errors during service fulfillment; and detailed service and transport visualization and industry-standard OA&M capabilities that provide service assurance. Simplified service engineering via network discovery and a powerful visual interface allow carriers to maximize network efficiency. Table 1 provides a summary of Extreme Networks recommended Carrier Ethernet Transport products for rural and metro deployments. Table 1. Extreme Networks Recommended Product Mix Deployment Type Subscriber Ethernet Access Line Rate Subscriber CPE Rural Up to 1 Gig Summit X250e Ethernet Access CO Summit X450a or Summit X480 Rural Up to 10 Gig Summit X450a Summit X650 Metro/Regional Up to 1 Gig Summit X250e Summit X480 Metro/Regional Up to 10 Gig Summit X450a Summit X650 Access Aggregation CO Metro Core CO Summit X480 BlackDiamond BlackDiamond or Summit X480 BlackDiamond BlackDiamond BlackDiamond Services Management Ridgeline Service Advisor Ridgeline Service Advisor Ridgeline Service Advisor Ridgeline Service Advisor 2010 Extreme Networks, Inc. All rights reserved. Carrier Ethernet Transport Solution Overview Page 5

6 Extreme Networks Carrier Ethernet Transport Solution Overview Extreme Networks Carrier Ethernet Transport Solutions Extreme Networks Carrier Support Team Our Global Carrier TAC and Professional Services Team provide expertise in every phase of the network lifecycle including assistance in the assessment, design, implementation, operation, and optimization of the network. Tailored professional services solutions include: Carrier Ethernet Professional Services Figure 2. Extreme Networks Carrier Ethernet Transport Solutions Carrier Ethernet Knowledge Transfer (Training) Carrier TAC with Premier Services Program Foundation Additionally, Extreme Networks ExtremeWorks maintenance and support program offers carriers technical assistance around the clock, around the world. Operations are located in Raleigh, North Carolina and Santa Clara, California; Utrecht, the Netherlands; and Tokyo, Japan Extreme Networks, Inc. All rights reserved. Carrier Ethernet Transport Solution Overview Page 6

7 Extreme Networks Extreme Carrier Ethernet Networks Carrier Transport Ethernet Solution Overview Network Applications Extreme Networks Carrier Ethernet Transport solutions support a variety of applications. This section provides sample network configurations and recommended products for some of the many applications of Ethernet Transport. Application 1: Residential Triple Play in Suburban or Rural Areas Extreme Networks Summit X480 switch is used for Ethernet Access Aggregation, and is an excellent choice for suburban or rural residential triple play deployments (see Figure 3). In this application, the Summit X480 switch in the Access Aggregation central office serves multiple Gigabit Ethernet Access Rings. Each Ethernet Access Ring serves multiple Ethernet Access central offices. Each Ethernet Access central office in this example is also equipped with the Summit X480 for 10/100 Ethernet access. The Summit X480 supports up to 512K MAC addresses, providing outstanding subscriber and services scalability. In this example, the VoIP softswitch, video content, and Internet access is co-located at the access aggregation central office. Figure 3. Residential Triple Play Reference Architecture for Rural or Suburban Area Key Technology: IEEE 802.1ad Provider Bridges (PB) Provider Bridges (PB) gives carriers a simple way to scale networks beyond Ethernet s early limitation of 4,096 VLANs. This feature was pioneered by Extreme Networks, originally called Q-in-Q, and is now an IEEE standard known as 802.1ad Provider Bridges. With PB, a second 802.1Q VLAN tag is inserted into the Ethernet packet, called the provider tag. The carrier can then ignore the customer s VLAN tag and only switch traffic based upon the outer provider tag. PB has been widely deployed by carriers around the world, and is sometimes referred to as tag stacking, or VLAN stacking. PB has been available on Extreme Networks switches since Key Technology: RFC 3619 Ethernet Automatic Protection Switching Protocol (EAPS) In the past, carriers relied on the Spanning Tree Protocol (STP) to provide a certain level of redundancy in their aggregation networks. However, STP has been proven inadequate to provide the level of resiliency required for real-time applications such as voice and video services. Extreme Networks Ethernet Automatic Protection Switching protocol (EAPS, RFC 3619) is an industry-leading resilient Ethernet ring protocol, deployed on thousands of rings in carrier networks around the world. EAPS provides advanced support for resilient Ethernet rings not found in alternative approaches including subtended rings, dual-node interconnect, and spatial reuse among others. EAPS enables service continuity across alternate routes when links fail. Extreme Networks EAPS (RFC 3619) protocol is capable of 50ms recovery time from ring failures in most cases without impacting the quality of these real-time services, a dramatic improvement over the time it takes using the STP Extreme Networks, Inc. All rights reserved. Carrier Ethernet Transport Solution Overview Page 7

8 Extreme Networks Extreme Carrier Ethernet Networks Carrier Transport Ethernet Solution Overview Network Applications Application 2: Converged Residential, Business and Mobile Backhaul Service in Metro Areas In metro areas, regional and global carriers often deploy a stacked ring architecture that adds an Ethernet Aggregation tier to the Ethernet Access Ring Architecture previously described (see Figure 4). In this configuration, multiple Access Aggregation central offices are served by multiple 10G Ethernet Aggregation rings from a Metro Core central office. As before, the Ethernet Access central offices are equipped with either Summit X480 or Summit X650 Ethernet Transport switches, and the Ethernet Aggregation central office is equipped with BlackDiamond Ethernet Transport switches. To this we add the BlackDiamond to the Metro Core central office. The high-performance BlackDiamond series Ethernet Transport switches are an excellent choice for high-density deployments. These switches provide high-density 10 GbE with 120 Gbps per slot switching capacity today, with future hardware upgrade to 100 GbE access and an industry-leading 480 Gbps per slot capacity. The BlackDiamond series uses the same power supplies, I/O modules and management modules, lowering total cost of ownership by reducing the number of spares and increasing the reusability of components and business processes as networks grow over time. Figure 4. Metro Triple Play, Business Ethernet and Mobile Backhaul Services Reference Architecture Key Technology: Hierarchical Quality of Service (H-QoS) H-QoS allows the carrier to assign a committed rate and a peak rate per port, per subscriber and per application. There are two common ways that this is implemented, one for business services and one for residential services. For business services, H-QoS can be deployed with a Q-in-Q stacked VLAN per subscriber and a VLAN per application. For residential services the model is typically a VLAN per subscriber and applications defined by Class of Service (CoS) field in the VLAN tag or by DSCP in the IP header. These approaches allow a straightforward way to determine network load, easing the network planning burden while working to assure QoS for subscribers Extreme Networks, Inc. All rights reserved. Carrier Ethernet Transport Solution Overview Page 8

9 Extreme Networks Extreme Carrier Ethernet Networks Carrier Transport Ethernet Solution Overview Network Applications Application 3: Metro Business E-LAN Services with Provider Backbone Bridges (PBB) Extreme Networks Ethernet Transport PBB solution is optimal for offering native Ethernet E-LAN services. The multipoint-to-multipoint capability bridges subscriber packets across a provider backbone so the subscriber and provider networks are separate and isolated, improving scalability. In this configuration, PBB simplifies the scaling of Ethernet Aggregation networks. The technology provides a simple expansion path for carriers currently running Q-in-Q networks, and a short learning curve speeds ramp-up time of network staff. These deployments typically use a ring topology running EAPS for network resiliency. Figure 5. Business E-LAN Services with PBB Reference Architecture Key Technology: IEEE 802.1ah Provider Backbone Bridges PBB greatly improves the scalability of Ethernet networks. PBB bridges the subscriber packets across a provider backbone by adding a second MAC address to each packet header. The new MAC address is used by all of the switches in the core and hides the vast number of end-user MAC addresses, eliminating the need for large MAC tables which drive up equipment costs. In current metro Ethernet networks, the number of 802.1ad Provider Bridges (PB) is limited to 4,096 by the number of bits in the vman ID. When scaling to larger networks beyond the basic metro, more connections are often required to serve the larger subscriber base. PBB solves this problem by extending the service identifier field in the packet header, allowing for a possible 16 million service instances. PBB also works in conjunction with the 802.1ad Provider Bridges VLAN stacking standard to allow both techniques to be used simultaneously. This allows a simple expansion path for providers who have already implemented a PB architecture. Rather than altering their existing network design, they can transition to PBB technology, giving them significant improvements in scalability while maintaining the economic benefits of Ethernet Extreme Networks, Inc. All rights reserved. Carrier Ethernet Transport Solution Overview Page 9

10 Extreme Networks Extreme Carrier Ethernet Networks Carrier Transport Ethernet Solution Overview Network Applications Application 4: E-Line and E-LAN Services over VPLS A common approach to delivering business E-Line and E-LAN services is with Virtual Private LAN services (VPLS). Communications among subscribers will take place as if over a single local area network. Summit X250e is deployed at the customer premises and Summit X480 at the Ethernet Access central office, then connected to the VPLS-enabled BlackDiamond Ethernet Transport switch at the Access Aggregation central office. For carriers with business customers demanding logical separation for each department across the wide area network (WAN), E-LAN services allow them to do so using a single physical corporate network. The connections are separated using the 802.1Q VLAN tagging protocol, and traffic flows on each virtual network are kept confined to that network only. Figure 6. Business E-LAN Services with VPLS Reference Architecture Key Technology: Virtual Private LAN Service (VPLS) VPLS is a technology that connects disparate Ethernet LANs over the WAN so that they appear to subscribers as a single Ethernet LAN. Carriers can offer reliable business services to organizations with geographically dispersed offices without the high costs associated with providing such services using legacy SDH networks. Unlike legacy networks, VPLS provides both operational flexibility and cost advantages by making it possible to offer bandwidth increments on an as-needed basis to multiple subscribers. Bandwidth usage can be billed accordingly. VPLS also overcomes some of the same scaling issues around PB service instances that are also addressed with PBB Extreme Networks, Inc. All rights reserved. Carrier Ethernet Transport Solution Overview Page 10

11 Extreme Networks Service Carrier Ethernet Provider Solution Overview Carrier Ethernet Architecture Summary Extreme Networks high-performance Carrier Ethernet Transport solutions provide service providers the flexibility they need to meet the growing demand for IP and Ethernet services within budget while offering ample room for growth without major reinvestments. Ethernet Transport s simplification of the network yields significant savings in both capital expenses (CapEx) and operational expenses (OpEx) by requiring less equipment to aggregate traffic from more services and supporting a simplified operational model. Extreme Networks Carrier Ethernet Transport solutions enable carriers to monetize their network by shifting from reactive circuit monitoring to proactive service management, which accelerates revenue, enhances subscriber experience and maximizes network efficiency. Corporate and North America Extreme Networks, Inc Monroe Street Santa Clara, CA USA Phone Europe, Middle East, Africa and South America Phone Asia Pacific Phone Japan Phone Extreme Networks, Inc. All rights reserved. Extreme Networks, the Extreme Networks Logo, BlackDiamond, ExtremeWorks, ExtremeXOS, Ridgeline and Summit are either registered trademarks or trademarks of Extreme Networks, Inc. in the United States and/or other countries. Specifications are subject to change without notice. 1214_09 05/10

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