Cisco Systems is announcing a new set of features that enhance its HDX (High Density Experience) suite. This blog is the fourth in a series that explains the new features that comprise the enhancements to HDX.
The first three blogs in the Enhancing HDX series are here and here and here.
The rapid and massive adoption of Wi-Fi into handheld devices has created new challenges for managing a wireless network.
As a consequence, the traditional view of a rogue Access Point has to change. The advent of mobile APs and Wi-Fi Direct (client to client networking without requiring infrastructure) means that rogue devices don’t need to be “connected” to the infrastructure in order to create a potential for nuisance.
Effectively these capabilities mean that “Bring Your Own Device” (BYOD) may also mean “Bring Your Own AP” or “Bring Your Own Network” and therefore “Bring Your Own Interferer”. Thus the threat from a rogue becomes less about security and more about consuming excessive air time (a so-called “spectrum hog”) thus degrading performance in the WLAN. This can be especially troublesome in high density pubic venues but can also be problematic in enterprises.
So in addition to Cisco CleanAir (which mitigates and reports on non Wi-Fi interference) and RRM (which primarily prevents self induced neighboring AP interference via DCA and TPC for the entire WLAN) Cisco is effectively merging aspects of both of these solutions in order to provide improved mitigation of Wi-Fi that is not affiliated with the production WLAN.
Accounting for rogue Wi-Fi interference is accomplished by configuring a trigger threshold for ED-RRM. This is effectively a severity indicator so that the affected access point that has ED-RRM is additionally triggered by Wi-Fi interference.
Since rogue severity is now added to the ED-RRM metrics, this provides the capability of a faster channel change than the typical DCA cycle. In other words, if a rogue is interfering with airspace, then instead of waiting until the next DCA cycle to elapse, change the channel as quickly as possible. This is the same behavior as for mitigating non-Wi-Fi interferers with Cisco CleanAir technology.
Since Wi-Fi interference is becoming more prevalent, rogue APs that are serving traffic to clients (e.g., mobile APs) or client devices creating networks in real time means that air quality will be affected. Wi-Fi needs to be prevented from becoming a problem by reacting to the presence of client devices that are legitimately acting as independent, unaffiliated networks.
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Tags: byod, Cisco CleanAir, Cisco Mobility, ED-RRM, HDX, Mobile APs, RRM, wi-fi, wlan
In my last blog I discussed setting the stage in preparation for the Wi-Fi network for Mobile World Congress 2014 which supported more than 80k devices over a span of 4 days. Today I’ll talk about one of the many site surveys we conducted at the Fira Gran Via to ensure the success of our high density network. Full details in the white paper here.
High Density Wi-Fi deployments and site surveys go hand in hand. Pre-installation and post-installation site surveys account for the most effective way to identify the contours of your RF coverage and eliminate potential multipath distortions, hidden nodes, and other coverage issues. Special attention was given to the large keynote auditorium halls in order to keep a check on the additional RF coverage needs to accommodate the high density of users packed in a very close range.
View of inside the Hall-4 Keynote Auditorium (23000 sq ft) before the Facebook keynote session
Site Survey analysis used to measure the RF coverage in Hall-4 keynote auditorium
The Hall-4 auditorium was one example of such a high density area with the 2000 person capacity area had a peak connection of 1924 concurrently connected Wi-Fi devices distributed across 16 Cisco APs while the Facebook keynote was in progress, with a max load of 530 Mbps of internet traffic. To avoid an RF overlap, the ceiling mounted APs above the auditoriums were converted to monitor mode. Using the final pre-keynote site survey data, the RF profile for the Hall-4 auditorium was tweaked, and RRM automatically optimized the coverage to the desired degree by adjusting the Tx power levels. Read More »
Tags: access point, AP, application, barcelona, beamforming, Cisco, client, coverage, data transfer, deployment, device, Dual Band, event, experience, fira gran via, GHz, HD, HDX, hidden node, high density, hotspot2.0, infrastructure, internet, keynote, mobile world congress, multipath distortion, mwc, network, network operations, radio resource managmeent, rf, RRM, rx-sop, site survey, TB, traffic, traffic pattern, user density, users, wi-fi, wifi, wireless, wireless data transfer
Every year a new attendance record is set at Mobile World Congress by networkers participating from over 200 countries across the globe. This grand attendance of industry-defining vendors, technology enthusiasts and exhibitors triggers an explosive growth in the number of Wi-Fi capable devices being brought to the event. For MWC 2014, Cisco partnered with Fira Gran Via and GSMA to pull off one of the most successful high density Wi-Fi network deployments in the history of global tech events. This blog kicks off a series to provide a glimpse of behind the network, into the design stages, and the course of actions undertaken to implement a robust high density wireless network which served more than 22,000 concurrently connected unique devices and a total of 80,880 devices throughout the event. Full details in whitepaper here.
Setting the Scene
Divided into eight massive exhibition halls, Fira Gran Via covers around 3 million square feet (280,000 square meters) of area which also includes outdoor areas, restaurants, conference rooms, network lounges and a continuous elevated walkway flowing through the entire venue. Higher the environmental complexity, the more fun and challenging it is to achieve the right wireless design for a pervasive network that meets all the needs.
An aerial view of Mobile World Congress 2014 arena at Fira Gran Via, Barcelona
Generally, the physical design of large convention and exhibition halls bear an impish knack of unfavorable conditions for a ubiquitous high density Wi-Fi network, owing mostly to the lofty ceiling heights and construction components. Read More »
Tags: 2.4 GHz, access point, antenna, antennas, AP, architect, barcelona, beamforming, cell isolation, cleanair, ClientLink, convention center, coverage, deployment, design, device, event, fira gran via, GHz, hardware, HD, HDX, high density, infrastructure, interference, management, mobile, mobile world congress, mobility, mwc, network, networking, radio resource management, rf, RRM, rx-sop, site survey, site visit, tech, technology, venue, wi-fi, wifi, wireless
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
Quality wireless is already considered a base expectation by consumers across industries. At Cisco we aim to provide our spectrum of customers with a whole range of high performing products, so they can select the product best suited for their organization. If you were to stop by the Enterprise Networking booth at Cisco Live Milan, you’d be able to examine our full portfolio of access points and notice that there are two that stand out from the others: the newly designed, 802.11ac integrated 3700 AP we introduced at Interop New York and one more, except this one can fit in your hand.
We are pleased to announce Cisco Aironet 700W Series Access Point, a wall mounted wireless and wired integrated platform. 700W Series is the industry’s FIRST and ONLY dual radio, dual band 2.4/5 GHz Access Point with 4 GigE Ethernet ports for wired connectivity, like IP Phones, game consoles, entertainment devices or other connected devices. 700W Series can be powered either by Power over Ethernet (PoE) or by a local power adapter, while it also provides PoE out on one local port to power an additional connected device. Read More »
Tags: #CLEUR, access point, AP, bracket, cells, Cisco, cisco live, deployment, design, device, Dual Band, ethernet, form factor, GHz, GigE, high density, local port, mobile, mobility, PoE+, power adapter, Power over Ethernet, Prime Infrastructure, right-sized, roaming, RRM, wi-fi, wifi, wireless