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Wireless Controller Redundancy with No Client Reauthentication Needed

July 12, 2013 at 5:00 am PST

Last fall, I blogged about No SSID Outage or Access Point Stateful Switchover introduced with the AireOS 7.3 release whereby if your wireless LAN Controller fails due to some hardware failure, thousands of Access Points fail over sub-second to the standby controller! This is possible due to continuous synchronization of CAPWAP states, Configuration Changes, Radio Channel and Power, Roaming Keys and Access Point licenses between the two Controllers. This means even if the administrator changes the configuration, channel plans or the clients roam and the primary controller fails; the Access Points will simply fail over in a stateful fashion to the secondary. In this blog, I will share details on the upcoming enhancements to High Availabilty with the 7.5 release.

In the upcoming AireOS 7.5 release, we take High Availability to the next level with two critical enhancements.

1. Today, after Access Points fail over from the primary to the standby controller, each client tries to re-authenticate and the standby controller then checks against its CCKM database whether the client has already authenticated. At the rate of several tens of authentications per second, it can take anywhere from zero to a few hundred seconds for the tens of thousands of clients that are connected to a controller to re-authenticate. The client stateful essentially eliminates this downtime with sub-second failover. Thus the total downtime that any user running a voice-call or Citrix session experiences is 2-3 seconds that the application requires to reconnect.

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Swan & Dolphin Resort Showcases Connected Mobile Experiences at Cisco Live!

As part of Cisco Live! last week, Cisco hosted a Connected Mobile Experiences Dinner last night with senior executives of some of our customers and partners in  Shula’s Steak house at the Walt Disney Swan and Dolphin Resort in Orlando. One of the key points of the night was the presentation by Chet Patel, Director of IT at the Swan and Dolphin.

Chet discussed how Cisco’s Connected Mobile Experiences (CMX) solution has been deployed at the resort and the insights and benefits they are starting to derive already. The resorts executive business management are starting to get heavily engaged with the project and understanding the value that CMX can contribute.

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[Cartoon Catalyst Blog Series] The New Age Textbook – Implications of BYOD on K12 Education

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Today we’re talking tablets versus textbooks in the first of a series of blog posts inspired by cartoons. Does anyone have a good memory of their education textbooks?  Textbooks are cumbersome… anyone disagree?  Most textbooks are a bulky nuisance weighing down backpacks of elementary to high school students nationwide.   What I’m wondering is: why burden shoulders and backs with textbooks when the solution is already present in mobile education?  Cisco BYOD Solution for K12 Education transforms education allowing the freedom to go anywhere on campus with a mobile device and still perform the tasks you would on a wired network.  Here’re my two cents on why schools should consider making the switch away from textbooks. Read More »

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Live: 802.11ac with No Strings Attached

Coming off a busy week at Interop Las Vegas, we have recorded another info-packed podcast with the popular wireless networking podcast group “No Strings Attached Show”. The topic for this podcast covers the gigabit wireless technology, 802.11ac which if you attended Interop, you know this is a very hot topic (“I’ll take enormous understatements for $600, Alex”).

However, it is not just a discussion on what is included in the standard. Blake Krone and Sam Clements from No Strings Attached interview our Mark Denny and Brian Hart as they discuss a number of topics related to 802.11ac technology including the following:

-          The 802.11ac Wave 1 Radio Module for the 3600 Access Point, the availability and best practices for upgrading the 3600 AP with the 802.11ac Module

-          Segments of the enterprise market where 802.11ac technology is generating the most interest Read More »

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[Cross-Post] Take the Lead on Learning with BYOD and Mobile Devices in K-12 Classrooms

Open up access to enhanced teaching and learning resources utilizing BYOD with Cisco BYOD Solutions for K12 Education.  Read the Education blog.

McAllen Independent School District (ISD) is a great example of a school district utilizing Cisco BYOD Solutions for K12 Education.  With nearly 3300 employees and over 25,000 students in 33 campuses, McAllen ISD was challenged with a slow server and an overtaxed network. The bandwidth limitations and made it extremely difficult for the school to embrace the BYOD trend, let alone creating an enriched learning environment leveraging mobile devices.  Read More »

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