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Posts Tagged "Testing"

Developers of connected and autonomous vehicles are exploring the potential of RTK and PPP for precise positioning. This blog explores the need for lab-based simulation of error correction

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Developers of connected and autonomous vehicles must assess how well the vehicle’s antenna receives GNSS signals – and that requires over-the-air testing. This blog looks at the implications.

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Developers of connected autonomous vehicles must understand the impact of multipath and obscuration on the GNSS receiver. This blog explores the need for 3D simulation in the research lab.

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Positioning is a critical capability for autonomous vehicles, and requires testing over hundreds of millions of significant miles. We explore the case for simulation with hardware in the loop.

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Connected autonomous vehicles rely on a battery of sensors for position, navigation and timing. Our new blog series will look at four critical aspects of testing PNT capabilities in the lab.

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By Alain Vouffo On October 30, 2017
Networks
Automotive, testing, GNSS

Last Week, the third WAVE-DSRC plugfest took place in the Bay Area. Organized by the OmniAir Consortium,  with support from several sponsors, including Spirent, over 170 participated from more than 40 different organizations. The event was a real success and marked another milestone in the deployment of 802.11p-based V2X technology to enhance driver safety.

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Based on our experience working with leading providers deploying carrier-Wi-Fi, we have developed the following best practice recommendations: 1) Go beyond the Access Point, 2) Be proactive, not passive, 3) Measure what matters, 4) Go 24/7, 5) Get to the root of the issue.

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The demands for increased bandwidth in the data center are driving the creation of a new generation of data center switch platforms. These platforms, whether they are top-of-rack (ToR) or aggregation switches, are designed to support hundreds of gigabits/sec per slot—even terabits. 

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Recently, the media has been abuzz with Shellshock (also known as Bashdoor) vulnerability. This comes in an array of vulnerabilities that are being discovered daily. It should come as no surprise that products today still ship with software bugs, and vulnerability discoveries like these are not going to stop in the future. So what can be done to provide protection or at the least minimize the impact of such vulnerabilities?

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As Nemertes Research, voke’s ITO (Infrastructure Test Optimization), and Gartner research notes, and numerous other sources observe, implementation of IT initiatives such as data center network design, consolidation, and virtualization represent significant infrastructure and budget commitments that carry considerable risk.

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A manual test team conducts most of its testing directly from a written test plan or tests in an ad-hoc manner. Few if any automation solutions or scripting skills are used by the team. Organizations with manual test teams include: service providers, network equipment manufacturers, network equipment resellers, and enterprise IT departments.

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A diverse array of component devices and applications in a unified architecture may cause network failure.

While individual devices and applications may work as planned, the complexity of an entire network, however, with configurations and associated firmware out of synch, can create a critical potential vulnerability that must be tested for defects that can bring down your network.

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Not all test and lab automation solutions are similar. Test environments come in all shapes and sizes. Organizations have a broad range of testing needs. From extensive experience in delivering automation solutions, Spirent’s test automation specialists have been able to define organizational categories for test automation. By understanding these organizational categories before integrating test automation, Spirent is able to define the right solution for our customers.

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A test lab is usually complex and comprised of a wide variety of equipment. Equipment may be shared by multiple users across a number of different test beds. Managing and maintaining a test lab can become extremely difficult.

Traditionally a test or lab automation solution is an answer to a productivity challenge. But a test lab automation solution needs to take into account the physical setup of the lab and its test beds, the users of the lab and the tests that need to be performed in the lab. Failure to consider all aspects of the testing environment will typically lead to rework and delays.

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Simply put, the network failure threshold is the point at which your network breaks under real-world applications and user bandwidth. So is it better to know that before or after you launch your IT initiative?

To put it another way, from Nemertes Research’s perspective (from their classic issue paper Strategic IT Initiatives need Strategic Testing): “Without proper testing, such strategic initiative can fail with serious unforeseen consequences, including significant hard dollar and opportunity costs.” They also observed the gains expected from an IT initiative can be minimized or erased if the testing is not implemented before an initiative goes live.

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The need for a comprehensive system testing to assure reliable solution quality multiplies exponentially over time. Poor planning for expanding product testing requirements will increase the risk of brand damage and leads to productivity and revenue loss. Automated testing is essential in keeping pace with the ever expanding product and system testing requirements.

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As is the case with all marketing collateral, a company puts the best face on the product they want you to buy. In network equipment, part of that includes stating the capabilities of device, backed up by testing against particular requirements. While the device will likely perform exactly as described in the environment established by the vendor, how it performs in your network with your devices and your requirements is an entirely different proposition. “Results may vary.” Indeed.

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The crucial nature of testing the success of any data center initiative is widely recognized, but all testing is not created equal. Proper testing is required and is a critical element of ensuring this success. The set of industry best-practices described below were identified and defined after numerous data center testing engagements, across lines of business and around the globe, by Spirent’s team of Professional Services engineers.

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According to Network Computing and the Meta Group, the hourly cost of an hour of downtime ranges from $90 thousand for media to $6.48 million for a brokerage service, with telecom hitting in the middle at $2 million.* You don’t have to look far to find dramatic examples of the consequences of inadequate testing, or perhaps no testing at all.

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OFELIA, a pan-European environment for the research community, is conducting experiments in an OpenFlow-enabled wide-area network. OFELIA is based on a set of ten “islands” that create a diverse OpenFlow infrastructure that allows experimentation on multi-layer and multi-technology networks provided by the different islands.

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Infrastructure Test Optimization (iTO) first appeared a few years ago, and has attracted critical acclaim and a lot of strong advocates, but the full potential of the strategy has yet to be embraced by the global testing community.

Given the competitive landscapes in which companies operate these days it’s more critical than ever to reduce time-to-market and improve product quality. Equally important is generating better returns on investment (RoI).

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Whether you are developing a smartphone for immediate global sale, or designing the Global Navigation Satellite System (GNSS) technology of the future, BeiDou-2 is big news. For those outside the world of GNSS, keeping track of China’s developing satellite constellation—and its developing nomenclature—can be far from easy.

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This is the first post in a six-part series on lab management challenges. Check back for future posts that dive further into each of the following obstacles faced by test teams.

Product testing is critical to any pending product release or feature. If a flaw is overlooked during development, and the product is released to the public without correction, it can impact sales, and be detrimental to the company’s image and reputation in its market. A leading brand can be forever damaged by the release of a single dysfunctional product feature.

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In the new world of next-generation networks, pretty much every leading network equipment manufacturer (NEM) today has application-awareness built into their products. Whether it’s an application firewall, serving gateway or edge router, they’re all using deep packet inspection (DPI) to look deep into the network traffic to identify the specific application. For example, Cisco has Application Visibility & Control, Juniper has AppSecure, Palo Alto Networks has App-ID, Sandvine ha...

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Today, Juniper announced Junosphere™ Lab, an innovative on-demand service that gives service providers and enterprises immediate and low cost access to a virtualized environment for designing and testing networks. Very cool stuff – leveraging the power of the cloud and helping customers dramatically reduce their TCO while accelerating the time to model networks. Real Traffic in a Virtual Environment So when you spin up a network environment and model a production topology, you&rs...

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In our first edition of the Spirent (formerly Mu) App Quadrant, we compared the run-time aspects of the most popular desktop video applications – Netflix, YouTube, Hulu and Amazon Video on Demand – and showed that Netflix is not particularly friendly to both Consumers and Operators. It’s not just the apps – devices matter too! Operators continue to struggle with the unpredictable growth of applications and the devices used to access them. With millions of people runni...

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Video and P2P Rule! The traffic making up today’s networks is in a rapid state of flux. Just last week Sandvine, in their Spring 2011 Global Phenomena Report, noted that real-time entertainment continues to increase, and within North America represents almost 50% of peak fixed access traffic (much of this of course is due to Netflix). P2P traffic also continues to carve out a sizeable piece of the pie at around 20%. The rest is a mix of voice, business apps, games, Facebook and chat. Wha...

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There’s been a lot of debate recently about the impact of video apps on the network. According to Nielsen, Netflix alone now accounts for 20% of downstream traffic during peak times in the United States. In a previous blog Kowsik explained the behind-the-scenes interactions that are happening unbeknownst to you when you watch a Netflix movie. So that got us thinking – are all the popular video apps as network-intensive as Netflix? Are some video apps more user-friendly with their ban...

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Personally, as a consumer, I love Netflix, but it hasn’t been the darling of service providers and ISP’s lately. You can read about the Canadian ISP saga here. Our imminent next release of Spirent (formerly Mu) Studio will enable our customers to recreate 1,000,000 concurrent Netflix users watching a movie, so they can understand the impact of their application aware networks. One thing is pretty clear: compared to YouTube, Netflix inflicts so much more pain on the network....

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I’ve been in the testing business for many years now and I’ve come across a lot of grandiose claims by test tool vendors with regards to features and capabilities that just sound too good to be true. And in many cases, they are. When it comes to today’s world of smartphones and tablets and the explosive growth of web and mobile applications, it’s mind-blowing to see the sheer quantity of apps out there. If you look at the number of apps available today on just three of t...

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By Spirent On March 16, 2011
Security
IPS, Scale, Studio, Testing

Last month we added a new space on TestCloud with thousands of known attacks as .msl templates. Some of you may recall that the secret behind the speed of test creation with Spirent (formerly Mu) is in the way we can take in a wide variety of formats including .pcap, .har, curl to name a few and convert it into MuSL. So what we did was we took another look at our known attack templates and made that available as .msl templates. ...

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Let’s face it – wireless can’t match wireline for voice reliability. How many times have you experienced dropped call while in a moving car or train? How many times have you been unable to make a call while the person next to you continues with his or her conversation? And who did you blame? Your device, or your network operator? Consumers are definitely in charge with many choices for mobile devices and network operators. They have shown a willingness to pay for the latest features and...

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