Optimizing Unified Communications on the Wide Area Network
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- Annice Parsons
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1 1 Issue The Benefits of Unified Performance Management Implementing Voice over IP on the WAN From the Gartner Files: Top 10 Tips to Prepare Your Network for Unified Communications and Collaboration Unified Communications Needs Unified Performance Management 12 About Exinda Optimizing Unified Communications on the Wide Area Network Unified Performance Management delivers the visibility, control and optimization capabilities you need to manage UC traffic and ensure a high quality user experience The Benefits of Unified Performance Management Network managers need WAN Optimization solutions that will allow them to keep pace with the introduction of new technologies and applications in the workplace and the increasing user demand for better network performance. Acceleration and packet shaping are no longer enough to ensure a high quality user experience. Kevin Suitor, Exinda s VP of Marketing, explains what is driving the need for more intelligent WAN Optimization solutions, and why a Unified Performance Management solution that incorporates visibility, control and optimization is an important element in a long term network strategy. Editor: What is behind the growing need for WAN optimization? Kevin Suitor (KS): There are three business applications that are driving the need for WAN Optimization: voice, video and complex data applications. At the same time, we are seeing an increasingly mobile workforce, coupled with an increase in the adoption of server and desktop virtualization. These factors have presented challenges in ensuring sufficient network performance to support business-critical applications and to deliver a high quality user experience. Editor: What specific concerns do CIOs have about network performance? KS: The first concern for CIOs is optimization of bulky business applications such as file sharing, web performance, FTP and activities of that nature. A second concern is bandwidth reduction. If you re running into challenges with the utilization of your wide area network, you re looking at how you can reclaim wide area bandwidth, examining means to avoid an upgrade of that bandwidth, and how to more effectively utilize small links such as a satellite backhaul to effectively increase their capacity. A third concern is site consolidation - consolidating file servers, servers, storage backup and infrastructure into fewer data centers or sites. Featuring research from
2 2 Disaster recovery is also critical for most businesses. Being able to significantly reduce the recovery time, ensuring that you have full remote site backup, server replication and online backups running, are all imperatives for IT executives. Editor: What is needed for enterprises to embrace cloud applications? KS: There is a common saying in the industry right now: The cloud is cloudy. I don t think that s true. In the 80 s, there was a concept in computing called shared services. In the 90s the shared services model evolved into the application service provider model.application service providers. What we are experiencing today is a resurgence of this well understood model, which is a centralized glasshouse type model that is a hosted offer, enabled by a high quality, high performance network fabric. The key to cloudbased applications, whether you re going to run them as a private or a public cloud service, is to have a really great network experience. Editor: How can WAN Optimization improve the performance of Unified Communications on the WAN? KS: WAN Optimization solutions offering visibility, control and optimization can significantly improve the performance of Unified Communications. You should be able to look at, measure and respond to network delays, since Unified Communications traffic is very sensitive to variations and problems with network performance. It is also very sensitive to latency and packet loss, which are often a result of network congestion. You should also be able to control the latency in the network and ensure that these applications have priority and aren t being impacted by big lumpy files. UC is also driving the need for more granular monitoring and reporting, since a single endpoint can support data, voice, video and messaging services. Network Managers need the ability to apply policies at both the device and application level to ensure that each of these services performs smoothly and offers the required high quality user experience. Editor: How will the cloud impact UC? KS: Cloud based deployments offer network managers more flexibility and potential cost savings for their UC implementations, since the cloud model allows the movement of UC applications to the same virtual structure as they are using for other applications. The ability to avoid installing a large number of servers and server connections is especially attractive to larger enterprises with multiple sites. With cloud-based UC, WAN Optimization remains an important enabler, ensuring network managers can identify and control the traffic on their WAN and provide priority to critical applications. Editor: In an environment with cheap bandwidth and QOS, would I still need to optimize? KS: There are locations where organizations are able to obtain a tremendous amount of bandwidth at a low cost. Interestingly, these organizations still have a challenge because the more bandwidth you provide to a user community, the more of that bandwidth is consumed by non-critical traffic. The on-going challenge is to match the available bandwidth to the applications critical to the enterprise. Even with unlimited bandwidth, organizations still need to measure the user experience since that s the ultimate measure of network performance. Users expect a consistent and predictable experience over time, and network and application delivery optimization enable that consistent user experience so that users are not picking up the phone and calling the help desk. If you think about today s challenge for Infrastructure and Operations executives, it s about how do I deliver an excellent user experience? How do I measure, monitor and control the application performance experience, and how do I measure, manage and control congestion?
3 3 At Exinda, we have focused on each of these issues with the ultimate objective of tying network performance to the business priorities. We have focused on isolating and pinpointing exactly where slowdowns and bottlenecks in the network are occurring, providing informative dashboards for the IT team to be able to identify and resolve issues quickly ensuring the user experience is where it needs to be. Editor : What advice would you give to CIOs and IT managers? KS: You really can t - and shouldn t - optimize what you can t see. The first criteria you need to look for in a WAN Optimization solution is a large number of application signatures. At Exinda we believe there are three pillars to a next generation WAN Optimization solution. The first pillar is visibility. Network Managers need the ability to identify, report, and act upon the applications, users and devices present on your network. An Exinda solution, for example, identifies over 2,000 application signatures. An application such as Skype has more than 30 signatures and a selected solution needs to know what each of those signatures looks like in order to properly respond. The second pillar is control. Network Managers need a very strong control engine that is dynamic, policy-based and offering fine grained quality of service control to allow the creation of walls and the traffic lanes that allow your real-time applications to be given fast lane priority, and other applications to be assigned to the collector or slow lanes. Precise controls are necessary to ensure the right traffic is included in the right lanes. The third pillar of UPM is optimization. An Exinda solution understands what lane the traffic is in, and intelligently accelerates only those applications. You need each of these pillars to work in a unified manner, with a single hardware and software platform with a single management system allowing the creation of an optimum user experience. Source: Exinda
4 4 Implementing Voice over IP on the WAN The benefits of migrating from circuit switched voice to Voice over Internet Protocol (VoIP) are well known. The cost savings and productivity impact are just two of many benefits. VoIP allows organizations to take better advantage of audio and video conferencing, directory access, automated attendants, remote call management, unified messaging and much more. In addition, VoIP networks are more easily scalable than traditional PBX systems, as it is much easier to address moves, adds and changes within the voice network. However, the migration to VoIP and the subsequent convergence of the voice and data network does present some technical challenges. Traditional circuit switched telephony networks are built on point to point circuits. Each call from one person in the world to another has a unique and dedicated path dynamically established between the participants. This assures bandwidth and delays are guaranteed, delivering clear voice calls. IP networks are quite different. They are by design a shared resource, with any number of different applications, putting packets on the network. An IP network normally does not recognize which packet belongs to which application, and instead forwards each packet received in the order in which it is received (First In First Out or FIFO queueing). The last packets in the queue often experience the longest delay, especially if there is congestion elsewhere in the network. VoIP packets are subject to the variable bandwidth and delay caused by the presence of packets from competing applications, and they are extremely sensitive to bandwidth and delay variances. In addition, routers will drop packets if their queues fill during periods of congestion. While data applications can tolerate packet loss, dropped packets in VoIP equate to missing parts of speech and these impairments are very evident to the listener, resulting in a poor user experience and lower Mean Opinion Scores (MOS). So how does a company move from a predictable circuit switched network to an unpredictable converged network? There are several obstacles to overcome, but the cost efficiencies and productivity resulting from a single unified network are worth the effort if the right steps are followed. Network Visibility The first obstacle is to overcome any lack of visibility in the current network. Without the ability to see which applications are traversing the WAN, an organization is not likely to have a smooth and successful deployment of VoIP. Qualifying the network requires a baseline of the current behavior by measuring and reporting on several key performance metrics: Applications and Protocols using the Network Application Response Times Average and Peak WAN utilization User Identification and Drill Down how is the network being used, what applications are running These metrics will provide an organization the information needed to determine if their network is ready for VoIP. IP Network Intelligence The next obstacle to overcome is layering intelligence onto the IP network to deliver predictability. As mentioned earlier, IP networks were not designed for predictability. Jitter, packet loss, delay, and poor call provisioning can have a severe impact on call quality. In order to understand how they can be handled effectively with traffic shaping and control, it is first necessary to understand their effects on voice. Jitter - Over a converged network, small voice packets will be interleaved with data packets of varying sizes. This results in orderly packetized voice traffic being transmitted at disorderly intervals. This packet behavior creates variability in packet arrival time, which if severe, will compromise voice quality. The result may be a call that is unintelligible. Packet Loss - When voice packets are dropped, the result is speech that, to the human ear, sounds clipped, with part of the word or conversation
5 5 missing. Packet loss occurs when there is congestion in the network. This causes router queues to fill and drop packets. Delay VoIP has a very tight delay budget. Delay over ms is perceptible to the human ear and can impact the interactivity of a voice call. When voice packets travel on an IP network, given the right conditions, even a single large data packet ordered before a VoIP packet could introduce enough delay to have an impact on call quality. Without adding predictability to the network through policy based traffic shaping and control voice will not be assured the predictable behavior required to achieve quality results. Voice traffic must be protected by controlling and shaping bursty data applications such as file transfers and web browsing and also be guaranteed delivery and provided priority during periods of congestion. Network visibility, traffic shaping, and control will enable a successful voice roll out by allowing an organization to: Understand the bandwidth required for VoIP Understand what other applications are competing for the bandwidth Guarantee bandwidth and priority for VoIP Show the mix of traffic flowing over the network to identify the traffic types impacting voice performance ensuring network managers can take steps to control them Once an organization has implemented visibility and control they should perform ongoing network reporting on key performance metrics in order to protect their investment in a VoIP solution. In addition, they can now also predict the impact other network changes might have on voice quality or any other mission critical application using the network. FIGURE 1 Sample Application Visibility Report Source: Exinda
6 6 Case Study: VOIP Unlimited uses WAN Optimization to improve call quality VoIP Unlimited was established in the UK in February 2006 to assist IT and telephony dealers in introducing business class Voice over IP (VoIP) services to their SME customers. VoIP Unlimited is a wholesale specialist Session Initiation Protocol (SIP) trunk provider and supplies SIP breakout to IT and VoIP PBX resellers. The company identified significant revenue opportunities for IT and telephony dealers to expand the range of IP services to their customer base. The expanded services would allow dealers to gain recurring revenue streams and vastly reduce customer churn. Overview In order to maximize revenue opportunities, the company needed to find a way to overcome one of the drawbacks of VoIP: the problem of voice delays. They looked at various solutions on the market and selected the Exinda WAN optimization solution. Each Exinda appliance includes the ability to provide detailed reporting of SIP voice calls including MOS reporting, ensuring a tight fit with all the requirements of VoIP Unlimited s customers. The Exinda solution solves the problem of voice delays which has been a downside of VoIP service until now. It provides excellent reporting tools on both voice and data streams, enabling us to see and control the traffic on the network, said Steve Bieniek, sales director, VoIP Unlimited. Exinda appliances provide full visibility and management of SIP calls and the associated bandwidth resources, ensuring that VoIP calls have guaranteed bandwidth levels with full priority over data streams, providing best quality voice calls and preventing interruption by data transmissions. By implementing an Exinda solution within the network, VoIP Unlimited has ensured that end users receive the highest quality service levels. Exinda can classify SIP VoIP calls and perform callbased classification based on IP phone extensions within a network. The Exinda system monitors SIP VoIP calls being made from or to the office location. VoIP calls within a corporate network are initiated by the SIP protocol followed by Real-time Transport Protocol to carry the voice data. Steve Bieniek continued, Many people use applications such as Skype or MSN Live, more consumer oriented VoIP services, which is great for home use. But there have been issues in implementing it within businesses. We can now offer Business Grade Internet telephony services by connecting the ADSL network through our own switch based at the UK Internet s core in London s Docklands, through to the standard telephony network. Now customers can make inexpensive calls across their Internet connections rather than on relatively expensive ISDN or multiple analogue lines. He added, Not only are the call charges in line with - or cheaper than - competitive CPS (Carrier Pre-Select) rates, but increasingly they are free. International calls are very competitive too. With Exinda, not only can we offer an inexpensive solution but one of very high quality. This means that as more and more people turn to VoIP for their telephony, paying for standard call charges may become a thing of the past. Source: Exinda
7 7 From the Gartner Files: Top 10 Tips to Prepare Your Network for Unified Communications and Collaboration This document details the steps required to ensure that appropriate infrastructure is in place to support unified communications and collaboration (UCC) rollouts. Lack of appropriate infrastructure will result in user dissatisfaction and, potentially, failure of the overall UCC initiative. Key Findings Most existing networks are ill-suited to support UCC, particularly ad hoc multipoint videoconferencing. UCC applications introduce new protocols and network traffic patterns with increased dependence on quality of service. Required upgrades involve a broad range of systems, from Multiprotocol Label Switching (MPLS) backbones to access routers, as well as the introduction of new components such as WAN optimization controllers and Session Initiation Protocol (SIP) firewalls. For more advanced security requirements, consider session border controllers. As acceptance of UCC grows, dependence on the underlying infrastructure will increase. Ongoing evaluation of the business impact of infrastructure failure must be done to ensure that an appropriate level of investment is maintained to support these systems. Investment in staff training and in new design and troubleshooting tools is required to ensure a successful design, deployment and operation of UCC systems. Recommendations Involve the network and security teams early in UCC planning, pilots and deployments. Set proper expectations that during periods of peak demand some services, particularly videobased services, may have to be limited due to network bandwidth constraints. UCC deployment can significantly increase capital and operational costs for networking and security, so include these additional costs in the overall return on investment (ROI) calculation for UCC. ANALYSIS Many organizations will begin initial deployments of enterprisewide UCC capabilities in While much attention will be paid to Internet Protocol (IP) telephony call managers, video, shared work spaces and presence, most organizations will not devote adequate planning and resources to the required network infrastructure upgrades. However, without these upgrades end-user productivity and satisfaction regarding the UCC tools will not meet expectations. Gartner believes that UCC deployment must be addressed in the broader context of overall network re-engineering. UCC applications change network traffic patterns from hub and spoke to mesh as branches communicate directly with one another. Traffic loads change from non-real-time to latency and bandwidth-sensitive real-time communications, including ad hoc multipoint videoconferencing. Additionally, new protocols and servers are introduced into the environment, complicating design and operations. The impact of ad hoc high bandwidth services (such as point to point and multipoint video) can negatively affect overall UCC services. Advanced scheduling combined with call admission control (denying new sessions when at capacity) can help. But it is critical to set expectations that not all services will be available under any conditions and then to train the users on how to fall back to voice-only calls. Over time, demand for rich collaboration with employees that are off the corporate network or with business partners will develop. This will drive an increase in Internet access bandwidth and will introduce an additional set of interoperability and security concerns that are beyond the scope of this note. As with any IT investment, the level of investment must match the impact of the system on the business. As UCC systems are an emerging technology, the impact on the business may change as end-user acceptance and dependency evolves. Ongoing risk assessment and involvement of business leaders is critical to ensure that the appropriate investments in infrastructure and staffing are maintained.
8 8 Assure UCC Performance UCC introduces new traffic patterns and protocols to the network. While the signaling traffic tends to be many to one (endpoints to limited number of SIP servers), the session traffic will often travel directly between endpoints. As a result, a full mesh quality of service (QoS) implementation is required. Because many applications use HTTP or HTTPS as their transport, the QoS mechanisms must include deep packet examination to ensure that critical traffic is protected. Keep in mind that video consumes approximately 10 times the bandwidth of a voice call. As UCC gains acceptance, its use will increase and use patterns will emerge. To avoid an ever escalating demand for more bandwidth, it will be necessary to monitor ongoing use, working with teams that have regularly scheduled meetings to alter the meeting times, or adjusting the available tools during especially busy times. 1. If you haven t already done so, install redundant WAN links between critical sites to ensure a network outage does not disrupt communications between these sites. Keep in mind that relatively small sites may be critical to important projects. For these sites the redundant links may be provided by Internet virtual private networks (VPNs), although the performance of these links may be less predictable. 2. Implement QoS enforcement in the edge routers to protect critical SIP, voice over IP (VoIP) and video traffic, as well as other mission-critical traffic. Many companies connect to small branch offices via Internet VPNs, which provide best-effort transport with unpredictable performance. This may be inadequate for UCC traffic. If so, these links will have to be upgraded to MPLS connections, which will further increase the operational expense for UCC. 3. Consider WAN optimization controllers (WOCs) that provide deep packet examination to inspect and mark the traffic. In some cases, asymmetrical examination and enforcement may be adequate. In other cases, symmetric implementations may be required. Keep in mind that if any of the traffic is encrypted by IPsec, the overall effectiveness of the network may not be able to be guaranteed. 4. If bandwidth is scarce and expensive consider a combination of the following: 1. Offload less critical traffic (Web surfing, file transfers, ) to an Internet VPN to preserve bandwidth on the QoS-enabled network for performance-critical UCC traffic. This approach can also provide some degree of resiliency should the primary link fail. 2. Use advanced platform application delivery controllers (AP ADCs) and WOCs to offload busy links where more bandwidth is not practical. AP ADCs can improve the performance of interactive applications by 50% and can improve the response time for Microsoft SharePoint by as much as 50% without requiring an appliance in the remote office. WOCs can reduce response times by 50% to 90% and can reduce peak bandwidth requirements for nonvideo/voice applications by as much as 90%, although average improvements are typically closer to 50%. In many cases, a hybrid approach will be the most cost-effective approach with some sites served by AP ADCs while others require a combination of AP ADCs and WOCs. If multipoint voice and video calls are expected to be common, bandwidth upgrades will probably be required. If edge QoS and offload prove inadequate you may have to upgrade your MPLS services to include QoS support, which can be expensive. This will also require additional traffic engineering work across the backbone. Be sure that the cost of this upgrade is considered, if not explicitly included, in the overall budget for the UCC implementation. Adequately Size and Secure Your Infrastructure UCC architectures are different from traditional productivity applications. Most activities depend on one set of servers to set up communications and others to provide shared tools, and both sets of devices represent potential performance bottlenecks and single points of failure. End-user satisfaction with UCC implementations is directly linked to the availability and performance of those systems. 5. Ensure that multiparty services such as shared whiteboard or multipoint voice and video bridging have adequate capacity for anticipated use. While raw server performance is a component of this requirement, network performance can also affect overall system
9 9 performance. Take care to ensure that servers have adequate network bandwidth and that servers are located to minimize latency between end users. This may require regional servers. In cases where collaborators are distributed globally, latency may be an ongoing issue. In these cases it is important to set proper expectations during initial system rollout. If at all possible, select UCC products that support the call admission control concept, so that, for example, if a site can only support 20 video calls then the UCC system will block the 21st. It will then be important to coordinate capacity management between the network management systems and the UCC platform. 6. Implement redundant servers (often as distributed redundant pairs) with load balancing for all critical functions. As users come to depend upon UCC systems to perform their everyday activities, unplanned (and even planned) outages can result in significant disruptions to the business, loss of productivity and user dissatisfaction. Of course, the investment in redundant systems must match the economic impact of the outage. Running UCC services as virtual machines can reduce the cost of redundancy by sharing replacement pools with other virtualized applications. 7. While attacks against unified communications systems have been few and far between, UCC systems can be easily attacked and rendered inoperable, particularly by insiders. The level of protection for a UCC system should match its level of criticality. The main risk to a UCC system is that it could be disabled by an attack (for example, denial of service) on one of the UCC servers. Most UCC systems are based on the SIP signaling protocol, and a number of free tools are available on the Internet to launch SIP-based attacks. Also, SIP vulnerabilities are being exposed at a faster rate than with other signaling protocols, due in large part to the fact that open source SIP implementations are widely available to researchers and attackers. To mitigate these risks, protect the UCC servers with internal firewalls that provide stateful inspection of SIP (or whichever signaling protocol is being used). Organizations that are more security conscious may choose to complement the firewalls with an intrusion prevention system that is capable of preventing signaling attacks or implementing a session border controller (SBC). Alternatively, SBCs can be used to reduce SIPbased denial of service (DoS) threats that originate from within and outside an organization, and provide interoperability with various versions of SIP being used by service providers and enterprises. The complementary functions of session management and session border control improve enterprise communications security, UCC application deployment, operational efficiency and reliability. Match Your Tools and Training to the New Environment UCC traffic will share the network with existing traffic, making monitoring and troubleshooting more difficult and rapid problem resolution more important. 8. Consider general purpose network performance monitoring tools, rather than point products that can only monitor UCC traffic. General purpose network monitoring tools are able to monitor UCC traffic, but will evaluate it relative to the rest of the business applications that are also using the network bandwidth. UCC should be managed in the context of the broader enterprise network, not treated as a separate stovepipe. Point products only look at UCC performance, whereas general purpose tools monitor the quality of service for all network traffic, not just UCC. Before adding UCC traffic to the data network, it s vital to get a baseline of current network service levels and business application transaction performance, in order to be able to report any change in service quality after the UCC deployment. 9. Employ network emulation, simulation and modeling tools to determine if network latency and bandwidth limitations will negatively impact the end user perception of UCC applications. A network assessment should be performed not only to determine whether UCC traffic can be carried with adequate service quality, but also to predict the impact of UCC traffic on business applications that already run on the network.
10 10 As part of the capacity planning process, these tools can be used to help ensure optimal network design to support UCC and current business applications, as well as to reliably predict future performance based on an understanding of business demands, including additional users and new applications. Follow the planning process with a limited scale pilot to ensure assumptions are valid and to familiarize the team with the new products and procedures. 10. Upgrade network engineering and operations staff tools and training. UCC is an implementation of multiple products from multiple vendors. If the engineering and operations staff is unable to adequately design, deploy, operate and support the UCC environment, the project will quickly be seen as a failure by end users and top management. The introduction of SIP and other new protocols and technologies into the network, as well as the introduction of new traffic patterns and loads, may require additional staff training. New design and troubleshooting tools may also be required, each with their own training requirements. Gartner RAS Core Research Note G , Joe Skorupa, Debra Curtis, Lawrence Orans, 6 July 2010
11 11 Unified Communications needs Unified Performance Management IT teams looking to roll out UC and Collaboration should be considering rolling out a WAN Optimization solution concurrently or as an enabling technology in place prior to the roll out. Once you have made the decision to add a WAN Optimization Appliance at a remote office, you should consider how many functions can be combined within a single platform in order to minimize the need for a congo line of devices at the network edge. This is where Exinda s Unified Performance Management (UPM) provides increased value and innovation in handling UC and Collaboration. An Exinda wan optimization appliance can provide you with complete layer 7 visibility + control + optimization + video and object caching and intelligent acceleration within a single 1U or 2U footprint. Exinda offers the Exinda Services Platform (ESP), enabling support of third party applications such as a Windows 2008 server for print or local domain services, as a guest within the ESP hypervisor on the appliance. In order to reduce overall traffic on the WAN, consider the use of WAN Optimization and Intelligent Acceleration between the remote office and the data center or headquarters offices. Exinda s customers experience typical improvements on the order of 50% and some deployments have seen data reduction of as much as 95% on total WAN bandwidth consumed. The net result for the user community is predictable response times and less time waiting in front of the screen. Ensure that as policies are built for each remote site you have reserved adequate bandwidth for collaborative multiparty applications such as shared whiteboard and multi-point voice and video traffic based upon the network audit data available from each appliance. impairments have occurred. Also ensure that each tool can work within your overall network management strategy. For example, if your WAN Optimization Appliances also support NetFlow v5 and v9 they are ideally situated at a key demarcation point whether issues are located within the WAN or the LAN. Exinda s x60 appliances are NetFlow v5 and v9 enabled and act as application aware network probe rather than a stovepipe solution. As always, Exinda suggests that you build a baseline of traffic and network performance for a period of time before implementing new applications in order to have a true benchmark of service quality and performance before and after your UC application deployment. If you are considering UC and Collaboration this may be an impetus for considering the deployment of hybrid WANs utilizing both private line data services and public internet services from each branch office to reduce costs and preserve bandwidth on the private line network for mission critical traffic. Once a hybrid WAN path is selected, the visibility and reporting tools available from Exinda become invaluable in tuning the use of the high and low cost network elements. A key benefit and consideration is that once you deploy a hybrid WAN, you will have created a degree of redundancy and resiliency within your network, especially if you utilize a separate Managed Service Provider from your primary carrier using different building entry points and network routes. A UC and Collaboration project has a number of elements from a wide variety of vendors - adding each element of Unified Performance Management to the project is a key to minimizing project risk. Source: Exinda Ensure that the network management resources are available to determine where and when
12 12 About Exinda Exinda s WAN Optimization solutions have enabled more than 2,000 organizations in over 80 countries to see, control, accelerate and optimize the traffic on their Wide Area Networks. By delivering solutions that enable network managers to address today s challenges, Exinda helps to maximize network resources, control operational costs, and improve user experience. Founded in 2002, Exinda is headquartered in Andover, MA with corporate facilities in Toronto, Canada, and an expanding research and development facility in Melbourne, Australia. The company has also expanded its sales reach into the United Kingdom, Caribbean and Latin America, Europe, Middle East, and Asia. Exinda Global Headquarters 300 Brickstone Square Suite 201 Andover, MA United States Exinda s Unified Performance Management (UPM) Exinda s Unified Performance Management (UPM) approach applies to each of its WAN optimization solutions. Each Exinda solution was built from the ground up on a platform that brings together all of the elements required to manage your network amidst the fast changing IT landscape. The growing number, complexity and bandwidth demands of applications today means that network managers need to make smarter decisions to manage their networks. It is no longer enough to simply accelerate all of the traffic in your network, or to monitor usage to justify bandwidth upgrades. With Exinda s UPM, you have the information you need to help you make strategic decisions, and the tools you need to implement them all in a single, easy to use appliance. Optimizing Unified Communications on the Wide Area Network is published by Exinda. Editorial supplied by Exinda is independent of Gartner analysis. All Gartner research is 2011 by Gartner, Inc. All rights reserved. All Gartner materials are used with Gartner s permission. The use or publication of Gartner research does not indicate Gartner s endorsement of Exinda s products and/or strategies. Reproduction or distribution of this publication in any form without prior written permission is forbidden. The information contained herein has been obtained from sources believed to be reliable. Gartner disclaims all warranties as to the accuracy, completeness or adequacy of such information. Gartner shall have no liability for errors, omissions or inadequacies in the information contained herein or for interpretations thereof. The opinions expressed herein are subject to change without notice. Although Gartner research may include a discussion of related legal issues, Gartner does not provide legal advice or services and its research should not be construed or used as such. Gartner is a public company, and its shareholders may include firms and funds that have financial interests in entities covered in Gartner research. Gartner s Board of Directors may include senior managers of these firms or funds. Gartner research is produced independently by its research organization without input or influence from these firms, funds or their managers. For further information on the independence and integrity of Gartner research, see Guiding Principles on Independence and Objectivity on its website,
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