The big idea for SD-WAN is that multiple physical WAN links of any sort can be used to carry traffic without the network engineer having to do much engineering. Rather, the SD-WAN solution runs an overlay (tunneling) on top of the physical infrastructure, abstracting the actual links away.
SD-WAN forwarders (somewhat analogous to routers) monitor the performance of each physical link, and forward individual flows to remote SD-WAN forwarders across the link best able to handle that flow’s SLA requirements. Where did it get the SLA requirements? A network operator defined them in a central controller, which distributed that policy to all of the SD-WAN forwarders.
The practical upshot of all this? A company can reduce spending on private WAN links by adding cheaper broadband links to the WAN mix.
The Packet Pushers have heard from the following list of companies. Some of these vendors are Packet Pushers sponsors or podcast guests, meaning you can search our site to find more detailed information about their products and services.
The Packet Pushers haven’t had a chance to talk to BigLeaf in detail yet. Here’s a summary of their offering in their own words…
Bigleaf is an SD-WAN provider improving connectivity to the cloud. We don’t do site-to-site connectivity, which gives us an amazing security story since we don’t breach the security perimeter of the LAN, and our install is plug-n-play easy. Our Same-IP failover is a great BGP replacement, we intelligently load-balance all traffic in real-time based on ISP conditions, and our patent-pending Dynamic QoS system is core to our strength in optimizing real-time VoIP and other cloud traffic.
Intelligent WAN (IWAN) runs on Cisco routers with the appropriate licensing. IWAN is a collection of Cisco technologies that work together to make dynamic path forwarding decisions. For example, IWAN uses DMVPN as the overlay and PfRv3 to monitor path quality, managed by a hierarchical arrangement of policy distribution routers and NBAR/Netflow for limited application recognition. Network operators will manage the system via the soon-to-maybe-GA APIC-EM controller.
Observation: The general feedback is that IWAN lacks maturity & stability as at Oct 2015 and customers are advised to wait at least 12 months until the bugs are found by customer deployments (as is the Cisco way). Cisco has multiple SDN controllers for IWAN and its not clear which one will win the internal battle for survival.
NetScaler SD-WAN is an SD-WAN solution focused on optimizing traffic flows between a local office and cloud-hosted applications. Appliances are deployed at each remote location and the corporate data center. The appliance logically bonds multiple connections–including MPLS, broadband, mobile and satellite–into a single, virtual link. Connections between appliances can be encrypted using IPSec.
CloudBridge measures each packet to monitor link performance. If performance on one link degrages, the appliance can shift the flow to a different link. The appliance also includes WAN optimization features, including TCP termination, data decompression and deduplication, and caching for streaming video.
A controller manages the network, updates the software, and lets administrators set policies. Customers can prioritize applications based on business requirements; for example, VoIP calls can get the higest priority, while Web surfing gets best effort. Administrators can also prioritize link types; for example, 3G can be set only to use as a backup if other connections go down.
CloudGenix offers a full SD-WAN solution complete with forwarders, a policy controller, and a traffic analytics engine. It’s conceivable to replace traditional WAN routers with CloudGenix forwarders, which CloudGenix calls ION Elements, over time. CloudGenix prides itself on application and sub-application identification, an important capability when mapping application flows to specific WAN links for transport.
Whitepaper: CloudGenix SD-WAN Whitepaper By Packet Pushers
Historically, Ecessa made appliances that could aggregate multiple DSL circuits to act as a single, logical WAN circuit. Over time, they added functions like special treatment for SIP & voice traffic as well as enhanced security features. These days, Ecessa can still do all of these things, but in an SD-WAN model that caters to smaller companies with 10-50 sites, although sites smaller than 10 or as large as 200+ are Ecessa customers.
Key architectural features of Ecessa include automatic failover, load balancing, traffic routing and seamless connectivity — table stakes for SD-WAN products these days. An Ecessa purchase comes with Ecessa engineering – a turnkey service where Ecessa helps the customer bring the appliances online, maps traffic patterns, and stands up site-to-site tunnels in a hub-and-spoke, partial mesh, or full mesh topology after determining the best fit.
Historically in the Internet link load-balancing space, Elfiq has expanded their offering with SD-WAN capabilities. An engagement with Elfiq will likely involve their engineering services to get the system up and running initially, as endpoints need to be programmed to talk to one another. Once built, the endpoints maintain configuration synchronization with one another so that when new endpoints are added, all endpoints in the system are aware of the new destination.
Elfiq offers the core SD-WAN value proposition of secure transport over the Internet. Elfiq also offers an array of closely related products such as hybrid WAN and deep packet inspection that work together for a more complete WAN offering.
FatPipe® has multiple patents in software-defined wide area networking since the late 1990’s. It’s been shipping since 2001 and delivering products for more than a decade. Its MPVPN product description seems most to align with what I’d expect from an SD-WAN forwarding appliance. Coupled with its Symphony orchestration platform, I believe we might see what I think of as a typical SD-WAN architecture.
Glue launched their GluWare 2.x orchestration system in early 2016. GluWare’s initial use-case was orchestration of Cisco’s IWAN, but the system has grown to be a toolset for broader networking engineering configuration needs.
The system is based around the idea of models used to push complex changes to a variety of devices. The system is not “dumb,” in that it doesn’t blindly push code out to devices. Rather, GluWare knows the current state of a device as well as the intended state, and pushes only the required changes as well as removing extraneous, out-of-standard code. Therefore, the system is intelligent, with logic checks that occur before, during, and after deployment task execution.
The system is impressively powerful and readily intuitive to network engineers used to writing code stanzas at the CLI to configure Cisco devices, Juniper devices, etc.
We were briefed on Mushroom Networks by Cahit “call him Jay” Lad, CEO. Like Talari, mentioned below, Mushroom has been around for a while. It got its start making broadband bonding appliances, maximizing traffic throughput by making multiple physical links, of whatever type, behave as one single link. Some of you might think of MLPPP; Mushroom offered a more comprehensive solution than that.
With that heritage, Mushroom has moved into the SD-WAN space. Mushroom can still tie all links together, and push a single flow across all links. For those of you who shuddered at this notion, thinking of “per packet load balancing” in ECMP scenarios, consider that Mushroom deals with re-ordering of packets when needed, etc. for you — and it’s old hat to them. Other vendors such as Silver Peak and Talari can perform this exact same feat.
Mushroom can also manage sensitive traffic such as VoIP or video with its Armor products that specialize in these sorts of traffic flows.
Nuage’s SDN solution has found traction as network virtualization platform and in cloud operations. Nuage abstracts the physical network away, and automates virtual network services. The functionality is rich enough that Nuage has a play in the SD-WAN space as well, although that has not been its hallmark. If you’ve not heard of Nuage, you should put them in the same mental bucket as Cisco ACI and VMware NSX.
In December 2015, Cradlepoint announced that it was acquiring Pertino to integrate SD-WAN capabilities into Cradlepoint’s devices. The acquisition price was not disclosed.
Long the WAN acceleration king, Riverbed is adding SD-WAN capabilities to its strengths in traffic analysis and knowledge of WAN environments. Riverbed could be criticized for being a little slow to the SD-WAN party, but customers who are already using the venerable Steelhead products for WAN acceleration should be poking their reps about SD-WAN capabilities.
This is especially true for those enterprises consuming applications in the cloud, as Riverbed partners with cloud providers to position what we think of as “Steelheads in the sky.” The right license key gives you access to this functionality.
Riverbed purchased Ocedo in January 2016.
Historically a WAN optimization player like Riverbed, Silver Peak has released an SD-WAN product called Unity, including the Unity Edge appliance that can terminate WAN circuits. Silver Peak has always been good at application identification; it brings that capability, along with its policy controller, into a full SD-WAN solution. Silver Peak also offers a step-up called Unity Boost that adds WAN optimization capability to the SD-WAN platform.
Sonus manages application flows across a WAN infrastructure with its NaaS IQ product, conceptually similar to some of the other solutions mentioned. Where Sonus is unique is in how it directs traffic. Sonus manages WAN edge switches using OpenFlow, although it de-emphasizes OpenFlow specifically, pointing out that how it directs flows is less important than the fact that it does direct flows.
Talari is another SD-WAN firm with appliances as well as a controller. Its value proposition is for you to mix and match your WAN links while guaranteeing a particular user experience you define. Talari is notable in that the company has been around for a while, offering an SD-WAN solution before SD-WAN was a trendy buzzword. Even if you’ve never heard of Talari before, it isn’t a startup.
TELoIP hardware and software creates a virtual network overlay across the Internet. A TELoIP box connects to the TELoIP Internet cloud, where traffic is optimized across the Internet backbone between TELoIP POPs. Note that the TELoIP Internet cloud is not a private WAN, but runs over the public Internet.
TELoIP’s VINO technology translates to an SD-WAN offering as well as an SD-Internet offering.
TELoIP caters to the reseller market, partnering closely with firms who wish to offer SD-WAN to their customers. The TELoIP solution scales, but TELoIP considers small installs to be a good fit for their technology as well.
Whitepaper by Packet Pushers: The Case For SD-WAN
VeloCloud’s SD-WAN focuses on optimizing user experience as they consume cloud applications. VeloCloud has appliances located globally, and makes certain that your LAN-to-cloud traffic traverses the optimal Internet path. VeloCloud also offers a brandable solution for managed service providers, and will be growing into the enterprise WAN space as well. At a couple of events, I’ve seen a fascinating demonstration where VeloCloud simulates a troubled link and pushes a video stream through it, both with and without VeloCloud impacting the flow.
A 2015 entrant to SD-WAN market formed by ex-Juniper staff. Key features are
- Focus on service injection/NFV in the edge node
- scaled deployment model through the use of BGP for configuration state
- targeting carrier and managed service providers
- NETCONF APIs for configuration and operational management
- strong focus on multi-tenancy in the data plane and controller platform
- many carrier features for SD-WAN
Sponsored Blog Post: What Is Visibility Without Control? (On The Outside Looking In)
Virtela was acquired by NTT Communications in January 2014. While Virtela doesn’t market itself as SD-WAN, the company does offer functionality similar to SD-WAN with their global cloud product offerings. In short, Virtela abstracts away a variety of carriers, offering global service guarantees for different traffic classes from one end of the planet to the other. This core service is offered as a component of a variety of products, including IP VPN, Cloud-Based Application Acceleration, and Virtualized Overlay Networking.
Enterprises consuming these services connect to their own endpoints, or to endpoints in public clouds. The end user experience is optimized by Virtela’s platform, meaning that Virtela sorts out the best way across the global Internet for a given application beyond what comparatively simple BGP routing is able to achieve.
Similar to CloudGenix, Silver Peak, and Talari, Viptela works with a central policy controller and SD-WAN forwarders. Viptela’s early differentiators have been high scalability and easy integration with traditional routing systems. The Gap (a retail clothing store) is a notable customer, with a Viptela install in excess of 1,000 locations.
Aside from vendors making SD-WAN products, there are resellers specializing in SD-WAN solutions who can help you choose the platform that makes sense for your traffic mix, application deployment model, and business requirements.
MPLS-Experts is a WAN consultancy with SD-WAN expertise. Their approach is to perform detailed WAN traffic analysis at customer sites, then design a solution to best meet the needs indicated by the application mix. MPLS-Experts has no loyalty to any single SD-WAN solution, positioning the best technology to meet the organization’s needs.
Podcast: How To Shop for SD-WAN
WAN Dynamics is an SD-WAN VAR and integrator, reselling SD-WAN products from VeloCloud, BigLeaf, and Talari under the DynaWAN product name. WAN Dynamics’ calling card is no outsourcing. They do all their own work in-house.
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