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:
Read More »
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
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
On May 22, Harford County, Maryland held a press conference to announce its high-speed fiber optic based network, which will connect government buildings, schools, and libraries while reducing costs. The fiber optic cable, known as HMAN, or Harford Metro Area Network will allow greater broadband access to residents. According to Ted Pilbil, director of the county’s ICT department, the HMAN will “upgrade the county’s computer network and serve as a communications backbone” for Harford.
Since its conceptualization five years ago, HMAN has grown both from the efforts of the Inter-County Broadband Network (ICBN) – a consortium of six Maryland counties – and a federal grant under the Broadband Technology Opportunities Program (BTOP).
As part of the fiber optics solution, Cisco helped guide the County into a design that was within its budget and met all its technical needs. More than 100 miles of fiber optic has connected approximately 100 institutions around the county. The design included a Metro Ethernet solution based on the ASR9K platform, which has allowed the County to replace its expensive leased lines with a wholly owned fiber optic network managed by the county. The network has the ability to add Dense Wave Division Multiplexing (DMDW) optical technology to further expand the network capacity by a factor of 40x with additional equipment. Cisco’s flexible design allowed the County to reduce costs while providing high-speed connectivity to local schools, libraries, public safety offices, and economic development zones.
The HMAN has great potential to provide economic opportunities and bring business into Harford County. One such opportunity is the presence of “dark fiber.” In essence, dark fiber is when cables are not activated, which can allow a company to create its own private network. Furthermore, business that could not previously access broadband service from traditional carriers – whether due to location or cost – can now buy into a cost-effective, high-speed network. The data will move faster and with greater reliability and flexibility.
Alongside businesses, city and county government will also be linked on the broadband highway, offering endless possibilities for teleconferencing, data sharing, and video communications. Furthermore, HMAN will open opportunities for additional infrastructure for primary, secondary, and higher education.
By providing high-speed access to video, voice, and data for county organizations and residents, the HMAN will catapult Harford County into a technology center of the future.
Tags: broadband, county government, govtech, Harford County Maryland, municipality, state government, wifi
Technische Universität Darmstadt, usually known as TU Darmstadt is a research university based in Germany. It was founded in 1877 and over the last 137 years has grown to be among the largest and most prestigious public universities in Germany serving over 25,000 students per year. It is the alma-mater to many world-wide leaders from Nobel prize winners, a CEO of a fortune 500 company, a president of a country and multiple World Robocup champions.
No wonder, they have a reference from Albert Einstein!
In 2009 TU Darmstadt embraced BYOD with the 5508 Series Controller managing the 1140 802.11n Access Points. Recently we talked to Thomas Vogel, the Head of Network Group and Andreas Liebe, the Network Services Manager who have over 15 years of experience managing WLAN environments. In this blog, we will describe some of the details of WLAN deployments using the 3850 Series Switch and the 5760 Series Wireless LAN Controller to address the new requirements in the school environment. Read More »
Tags: 3850, 5760, 802.11, 802.11ac, 802.11n, access, access point, account, AP, App, application, authorized, AVC, bring your own device, buildings, byod, Cisco, client, controller, Converged Access, darmstadt, deployment, devices, employee, encrypted traffic, environment, frankfurt, Germany, infrastructure, IPv6, LAN, management, network, policy, prime, Prime Infrastructure, requirements, research, school, security, services, standard, switch, technische, technology, trend, TU, TUD, unified access, Universität, university, user, visualize, wi-fi, wifi, wired, wireless, wlan