Wi-Fi roaming is often a tumultuous subject. The crux of the issue is, with Wi-Fi the roaming decision is left to the client.
In the recent years, there have been great strides in improving Wi-Fi roaming with the creation of standards-based roaming technologies. Cisco first pioneered fast roaming many years ago with CCKM (Cisco Centralized Key Management), which was the foundation for 802.11r. 11r which was ratified by the IEEE in 2008, allows for fast roaming, even on a secure 802.1X SSID. With 802.11r it is possible to roam without disruption during a voice or video call.
While client support of 802.11r is largely lacking in the laptop space, there is large support in the smartphone realm. Apple iOS devices have supported 11r since iOS 6 (http://support.apple.com/kb/HT5535). The recent Samsung smartphones, such as the Galaxy S4, S5, and Note 3, also support 11r.
Note: Some non-802.11r clients can react adversely when connected to an 11r WLAN. The current recommendation from Cisco is to have a separate WLAN for 802.11r clients.
802.11k is another amendment from the IEEE that helps to improve roaming. 802.11k provides a whole slew of information to the client, which allows the client to understand the RF environment and make an informed roaming decision. This information can include channel load and AP neighbor lists.
11r and 11k help, however, that does not mean the infrastructure is irrelevant in the roaming picture. With the help of a model train, we did some testing to figure out just how much impact the infrastructure could have. We compared Cisco to one of our competitors, whom we will call Vendor A.
This video summarizes the results and shows the train in action, or continue reading for more details:
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Tags: 11r, 11x, 802.11, 802.11k, 802.11r, 802.11x, access point, AP, channel, channel load, client, dbm, device, infrastructure, rf, roam, roaming, roaming decision, RRM, SSID, standards, statistic, technologies, technology, transit power, video, Voice, wi-fi, wifi, wireless, wlan
With its fast-growing economy, India faces significant challenges in meeting the energy needs of its population and industry. And given the growth of the renewable energy sector, the Indian Renewable Energy Development Agency (IREDA) was established in 1987 to promote, develop, and extend financial assistance for projects involving renewable energy generation, energy efficiency, and conservation. IREDA recognized the need to optimize use of its resources and leverage technology advances to better serve its constituents.
To improve the efficiency of its increasingly complex operations, IREDA sought to replace its aging heterogeneous campus network infrastructure with a scalable, unified solution. Key requirements included superior reliability and security as well as energy efficiency to foster the agency’s values while providing cost savings. There was an immediate benefit in lowering network energy consumption and the network would be the tool to both help ensure the security of confidential information and provide high performance for applications such as video.
How did this renewable energy agency approach deploying a network that would be scalable and power resilient while optimizing network efficiency? Click to read the full blog
Tags: Cisco, confidential, Energy, financial assistance, india, ireda, midsize, network, performance, project, reliability, renewable energy, security, switch, technology
Everybody’s talking about 802.11ac, but we’ve sensed some confusion for next steps as far as how CIO’s and IT organizations should be approaching the new standard.
Should I move to 802.11ac?
You’re probably thinking: Chris, you’re a leader at Cisco, of course you want me to migrate to 802.11ac. That, my friends, is where you are wrong. There is no simple answer to the question of whether you should move your network to 802.11ac. Here’s my simple rule of thumb:
There is no premium for 802.11ac from Cisco. If you are deploying new Access Points’s today, you should be buying 802.11ac. If you’re not buying, you are probably satisfied with your network and how it will handle the growth of more and more clients associating with your network and the bandwidth demands that come with that client demand. If you feel you have a plan to handle this demand, then you are one of the few that can pass on 802.11ac.
That said, there is a strong ramp up for Cisco 802.11ac products in the market, the AP3700 is the fastest ramping access point in our history and we have yet to see if the AP2700 will claim that crown in the coming months. ABI Research estimates that currently 50% of new device introductions are 802.11ac enabled, a statistic expected to increase to 75% by the end of 2015. This is enough proof of the overwhelming interest in adding the benefits of 11ac to networks. Let’s take a step back and consider the basics of why people are moving to the new standard.
Today, everything is about getting what we want, when we want it. Instant gratification. It’s not just the millennials—we’ve all been conditioned to expect things within seconds. Could you imagine the days pre-Internet if you had the capability for on-demand movies? Read More »
Tags: 11ac, 11n, 802.11, 802.11ac, 802.11n, access point, AP, bandwidth, battery life, CIO, Cisco, client, consumer, dell'oro, deployment, device, education, End User, GHz, gigabit, HD, HDX, high density, IEEE, IT, laptop, macbook, mbps, Mhz, migrate, migration, network, networking, optimization, performance, retail, rf, Scalability, scalable, smartphone, spectral optimization, spectrum, standard, technology, university, visibility, wi-fi, wifi, wireless, wlan
First we rolled out the MSE tech blog series to give our customers an in depth look at the various features of the location-based technology behind Cisco’s Mobility Services Engine (MSE) and Connected Mobile Experiences (CMX) solution. Now, we’re kicking off a CMX Techtorial video series to provide a visual and helpful walkthrough of how to maneuver and get started with CMX and location-based services.
First up, we have the charismatic Darryl Sladden, Technical Marketing Manager for CMX, taking us through CMX 7.6 Analytics. In this quick video, Darryl will cover:
- What is CMX 7.6 Analytics?
- What is the analytics dashboard?
- How do I visualize dwell time, heat maps, device density?
- What kinds of reports can you get with CMX 7.6 Analytics?
Read More »
Tags: analytic, analytics, Cisco, cmx, connected mobile experiences, dashboard, data, device, experience, getting started, location, location based services, location-based, mobile, mobility, platform, service, services, support, tech, technology, video, visualize, wi-fi, widget, wifi, wireless, youtube
[Webinar] Mobilize Your Employees with Cisco Solutions for a Mobile Workspace
We discussed the considerations behind the Cisco-Citrix Mobile Workspace solution to set the stage for the CVD (design guide available now!) earlier this month, and now we’ve planned a great technical deep-dive for customers and partners interested in finding out more about the Mobile Workspace Solution. It’s going to be at 10am PST Wednesday June 4, 2014 (Click to Register).
Organizations are moving from just dealing with bring your own device (BYOD) and the influx of mobile devices to proactively developing solutions that use the full power of mobility. Because of the complexities and fluid technology horizon, this is often simpler said than done. Now you can simplify and accelerate your mobility projects by deploying a comprehensive mobility solution that has been tested and validated end to end. Read More »
Tags: access, Cisco, Cisco Validated Design, citrix, contractor, cost, CVD, deployment, device, employee, experience, Guest, mobile, mobility, organization, partner, performance, policy, rollout, secure, security, technologies, technology, time-to-market, user experience, webinar, wireless, workspace