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ARYAKA WHITEPAPER Hybrid WAN Architectures Mixing MPLS and Aryaka WAN services for maximum reliability, performance and cost effecveness
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Page 1: Hybrid WAN Architectures - PBworksromvchvlcomm.pbworks.com/.../Aryaka-Hybrid-WAN-Architectures-W… · Hybrid WAN Architectures Mixing MPLS and Aryaka WAN services for maximum reliability,

A R Y A K A W H I T E P A P E R

Hybrid WAN ArchitecturesMixing MPLS and Aryaka WAN services for maximum

reliability, performance and cost effectiveness

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Rethinking the WANHybrid WAN Architectures

1 691 S. Milpitas Boulevard Milpitas CA 95035 1-877-727-9252 www.aryaka.com

Executive SummaryIT managers facing WAN bandwidth or performance challenges are starting to look beyond their private MPLS networks for longer term solutions, especially as reliable, high performance access to SaaS and public Cloud-based services becomes more important.

Aryaka’s WAN Optimization-as-a-Service solution combines multi-tenant, purpose-built WAN Optimization technology with enterprise-grade connectivity via a dedicated, reliable core network based on globally distributed POPs, and centralized WAN and application layer visibility. It delivers LAN-like performance over the enterprise WAN without the high cost of MPLS or the cost and hassle of WAN Optimization appliance solutions, all in a single, no CapEx monthly service.

But some enterprises, especially those running VoIP over their WANs, aren’t yet ready to completely give up their MPLS networks. Often a hybrid architecture combining MPLS with Aryaka’s WAN Optimization as-a-Service can be the best approach in terms of cost, performance, bandwidth and reliability for real-time applications.

MPLS is expensive and low bandwidth, but using it within a region (e.g. Europe, the continental United States) can make sense, especially for supporting VoIP and/or videoconferencing applications between locations. One simple approach is to use MPLS exclusively within such regions, but use Aryaka’s WAN Optimization as-a-Service using Internet connections for across-oceans distant global locations, providing better data application performance and significantly more bandwidth at lower cost. Headquarters and/or data center locations would have both MPLS and Aryaka network connections to provide complete connectivity across locations using different WAN services.

A more refined approach to longer-term bandwidth and performance issues, as well as high performance access to Cloud-based services, is to use both MPLS and Aryaka service at each location, and balance traffic across the two different WANs based on application. Voice, videoconferencing and perhaps VDI traffic would use the lower bandwidth but lower jitter MPLS network, while bandwidth intensive applications like file access, email and backup, as well as access to Cloud-based applications, would use the Aryaka network. Policy-based routing in the Cisco and Juniper routers commonly used for MPLS WANs enables traffic to be sent on the appropriate WAN, with each WAN providing backup for the other in case of link or network failure. Spending on MPLS can be capped, with growth in bandwidth over time on the Aryaka network leveraging the superior economics of Internet connections.

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Rethinking the WANHybrid WAN Architectures

The Business ProblemMany Enterprise IT managers face WAN bandwidth or performance challenges, especially for their globally distributed workforces. As CEO and CIO interest in leveraging public Cloud computing services and SaaS increases, WAN managers need to be able to support these initiatives, while still maintaining the network security, visibility and control they and their management have come to expect.

While bandwidth demands are growing substantially each year, most IT budgets are flat or declining. Doubling the WAN bandwidth of expensive private WAN services like MPLS every 12 to 18 months is simply not an option for most enterprises. So looking beyond private MPLS networks for longer-term solutions, leveraging relatively inexpensive Internet connections, makes a lot of sense, as long as performance, reliability and predictability challenges can be addressed.

Doubling MPLS bandwidth every 12 to 18 months is simply not an option for most enterprises.

Aryaka’s groundbreaking WAN Optimization-as-a-Service solution addresses the limitations of today’s public Internet connectivity. It combines our multi-tenant, purpose-built WAN Optimization technology with enterprise-grade connectivity via a dedicated, reliable core network based on globally distributed Points of Presence (POPs), and centralized WAN and application layer visibility. It delivers LAN-like performance over the enterprise WAN, using Internet access connections, without the high cost of MPLS or the cost and hassle of WAN Optimization appliance solutions, all in a single, no CapEx monthly service.

Customers connect into the Aryaka network to one or more of the nearest POPs with an IPSec capable edge device (router or firewall) over their existing business-class Internet connections, and can be up and running in minutes, not weeks or months. Direct L2 connection to an Aryaka POP is available also, both for those who want guaranteed last mile performance and lowest possible latency, and for those interna tional geographies where business-class Internet connections cost substantially more than local L2 access.

Unlike MPLS, which is rate limited at edge routers to the provisioned amounts, Aryaka’s offering allows peaking or bursting of traffic beyond the provisioned amount. This is especially important for branches where high-speed local loop connectivity can be obtained inexpensively, but cannot be used fully because nationwide or intercontinental links are expensive at higher speeds. We offer elastic capacity enabling instant upgrades when customers do need to subscribe to additional guaranteed bandwidth.

But some customers, especially those running VoIP over their private WANs, aren’t yet ready to completely give up their MPLS networks. Often a hybrid architecture combining MPLS with Aryaka’s WAN Optimization as-a-Service can be the best approach in terms of cost, performance, bandwidth, reliability for real-time applications, and support for SaaS and Cloud-based services.

2 691 S. Milpitas Boulevard Milpitas CA 95035 1-877-727-9252 www.aryaka.com

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Rethinking the WANHybrid WAN Architectures

Figure 1: Traditional MPLS WAN

The Simple Approach: MPLS Regionally, WAN Optimization as-a-Service GloballyToday, most larger enterprises, and some midmarket and smaller ones, use private Multiprotocol Label Switching (MPLS) network services from telecom service providers like BT, Orange and AT&T to obtain their reliable WAN connectivity. Global enterprises sometimes find they need to buy separate MPLS networks in Asia Pacific than in Europe or North America, either for connectivity or cost reasons. And while relatively low bandwidth for most customers, MPLS does indeed deliver reliable and predictable performance, especially regionally, and in particular for real-time applications like Voice over IP (VoIP) or videoconferencing.

The major problem with MPLS is that it is very expensive. While business Internet access costs are often substantially higher internationally than in North America or Western Europe, in most countries either local direct L2 connections or Internet connectivity, or both, are available at costs far lower than those of MPLS.

MPLS costs are high enough that even those customers that can afford them at low bandwidth cannot afford to continue buying more each year. Deploying WAN Optimization appliances over those links has helped some customers, but that solution is expensive and difficult to manage and deploy. While the price of MPLS bandwidth is declining somewhat every year, it’s not declining nearly as fast as the price of Internet bandwidth, and it’s not declining fast enough to offset the increasing demands for WAN bandwidth from larger, rich media-infused file sizes and newer applications. Bursting above subscribed bandwidth is not an option offered. Even those who have been able to afford MPLS and have leveraged WAN Optimization as an excellent “one-shot” solution to the need for more WAN bandwidth now have to figure out how to handle still increasing demands on the network, in particular as the use of SaaS and public Cloud services increases going forward.

Historically, the alternative for locations where enterprises have not been able to cost justify the expense of MPLS for connections in certain international locations, where the cost is prohibitive and deployment sometimes takes months, has been to use IPSec VPN connectivity over public Internet connections. While firewalls and IPSec solve the network-level data security and connectivity issues, application performance predictability can be quite variable, given the relatively frequent occurrence of congestion-based packet loss and bouts of high latency on the public Internet.

3 691 S. Milpitas Boulevard Milpitas CA 95035 1-877-727-9252 www.aryaka.com

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Rethinking the WANHybrid WAN Architectures

Figure 2: Simple Hybrid WAN

A simple hybrid network approach is to use MPLS exclusively within regions like North America or Europe, especially when using VoIP between locations, and to use Aryaka’s WAN Optimization as-a-Service for across-oceans distant global locations, and for access to SaaS and public Cloud-based services.

For a European-based company, for example, continue using MPLS within Europe, but use Aryaka for connecting locations in China, India, Australia or the United States back to European headquarters or data centers. For those global locations, this will provide better data application performance, and significantly more bandwidth at lower cost than MPLS would. Aryaka’s solution, with the combination of application proxies for “chatty” protocols like CIFS and MAPI, compression, data deduplication and TCP Optimization technologies, together with its unique multi-segment architecture with POPs close to end user locations, delivers far better application performance than a do-it-yourself IPSec VPN does, especially across oceans.

Aryaka will provide better data application performance for global locations.

For those global locations with low bandwidth or high latency Internet links, a network appliance is also available to provide bandwidth scaling benefits and improved last mile optimization. The Aryaka Network Access Point (ANAP) is an optional first mile / last mile device offered along with the service at no additional cost. The flexible capacity device is provisioned and managed entirely by Aryaka.

Headquarters and/or data center locations would have both MPLS and Internet-based connectivity using Aryaka to provide complete connectivity across locations using different WAN services, in the same way that IPSec VPN or remote access SSL VPN users access the global enterprise network today.

4 691 S. Milpitas Boulevard Milpitas CA 95035 1-877-727-9252 www.aryaka.com

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Rethinking the WANHybrid WAN Architectures

The More Refined Approach: Using both MPLS and Aryaka per LocationA more refined approach to longer-term bandwidth and performance issues, as well as for accessing Cloud-based applications, is to use both MPLS and Aryaka service at each location, and balance traffic across the two different WANs based on application. For example, the VoIP, videoconferencing and perhaps any Virtual Desktop Infrastructure (VDI) traffic would use the lower bandwidth but lower jitter MPLS network, while bandwidth-intensive applications or those that can benefit from application proxies, such as file access, email and backup, as well as access to Cloud-based services, would use the optimized Aryaka network.

Policy-based routing in the Cisco and Juniper routers commonly used for MPLS WANs can be configured to send traffic over the appropriate WAN connection. In addition, each of the MPLS WAN and the Aryaka network can provide backup for the other in case of link or network failure. The optional, no cost Aryaka Network Access Point (ANAP) device offered along with the service is highly recommended when using this type of hybrid approach.

VoIP traffic would use the lower bandwidth, lower jitter MPLS network, while bandwidth-intensive applications would use the optimized Aryaka network.

Figure 3: Refined Hybrid WAN

Enterprise locations connect into the Aryaka network over existing Internet links (or using a direct L2 connection) to one or more of our POPs, and can be up and running in minutes, not weeks or months. Aryaka’s dedicated core network with built-in diversity and redundancy provides reliability and stable low latency connectivity across the

5 691 S. Milpitas Boulevard Milpitas CA 95035 1-877-727-9252 www.aryaka.com

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Rethinking the WANHybrid WAN Architectures

globe between customer locations, as well as for accessing Internet-based SaaS and cloud services, avoiding the “middle mile” congestion problems that Internet-based connectivity solutions face. Our patent-pending multi-segment solution minimizes the impact of packet loss on the first/last mile when it does occur, delivering optimized, predictable performance.

The service offers elastic capacity with instant upgrades, so customers can quickly and easily add bandwidth at any location. The ability to burst to above the bandwidth paid for provides even more capacity without extra cost.

With this type of hybrid approach, spending on MPLS can be capped, with growth in bandwidth over time using Internet connections and the Aryaka network, leveraging the superior economics of the Internet, especially given the likelihood than an ever-increasing proportion of WAN traffic will be targeted at SaaS and public cloud-based services.

ConclusionMPLS is expensive and consequently relatively low bandwidth, and doesn’t address the need for high performance, predictable access to SaaS and public cloud-based services, but some enterprises, especially those running VoIP over their WANs, aren’t yet ready to completely give up their MPLS networks. A hybrid architecture combining MPLS with Aryaka’s WAN Optimization as-a-Service can be the best approach in terms of application performance, bandwidth, overall cost and reliability for real-time applications, allowing network managers both the sleep-at-night benefit of keeping their MPLS network with the longer term performance, cost effectiveness and superior access to cloud services that Aryaka’s solution offers.

Revised: January 27, 2013

ABOUT ARYAKA:Aryaka delivers application and network performance for the globally distributed enterprise for better collaboration, communication and business productivity. Aryaka eliminates the need for costly WAN appliances or long-haul private links. Aryaka’s premier WAN Optimization as-a-Service accelerates any application to any location on one affordable, optimized network. Aryaka’s Network as-a-Service provides organizations an optimized network with QoS for instant and reliable business connectivity. Aryaka’s Application Delivery as-a-Service enables distributed business users to quickly access centralized enterprise applications and Cloud resources from anywhere in the world. All services provide end-to-end visibility with 24×7 world-class support. To learn more, visit www.aryaka.com. Follow us on Twitter, Facebook, YouTube and LinkedIn.

691 S. Milpitas Blvd. Milpitas, CA 95035Tel: 1-877-727-9252www.aryaka.com

Aryaka, WAN optimization as-a-Service, Network as-a-Service, Application Delivery as-a-Service and MyAryaka are trademarks of Aryaka Networks, Inc. All other brands, products or service names are or may be trademarks or service marks of their respective owners.


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