Welcome CWNP.com Readers!
Welcome CWNP.com readers! I hope you enjoyed my guest blog post at http://www.cwnp.com regarding frequency band utilization for 802.11n networks.
Since you’re here, I am guessing that you interested in wireless networking and security!
Below are a some of my most popular blog posts to-date:
Technical
Opinion
Polls
- Frequency Band Utilization for 802.11n Networks
- Replacing Desktop Ethernet With Wireless
- IEEE Ratification of 802.11n Standard
For Project Managers
802.11n Deployment Considerations – Cabling
My 802.11n How Stuff Works Series was so popular, I thought I would start another series. This time I am going to talk about the various deployment considerations for 802.11n networks, such as:
- Cabling
- Power
- Trobleshooting/Analysis Tools
- WIDS/WIPS Sensors
- Etc.
Let’s take a look at the first of these considerations, cabling. With 802.11n, the data rates are drastically improved. Rates can be as high as 600 Mbps, but most practical implementations of 802.11n today have data rates of approximately 300 Mbps.
Therefore, the cable used should have higher capacity than 10/100 Mbps. What cables have 1 Gbps cabability? Category 5e or Category 6 cables can support the neccessary speed for 802.11n networks. IEEE 802.3ab also specifies 1000-Base-T over Category 5 cables, although I would personally recommend Cat 5e or Cat 6 cable.
Many newer access points or arrays have multiple physical interfaces to include console ports, 10/100 out of band management ports, and one or more 10/100 or Gigabit uplink ports. If your access points or arrays support multiple uplink ports, you should run separate cables to each.
Many times the multiple uplink ports can be configured in several different “modes” to include daisy chaining, port failover, port mirroring, or 802.3ad link aggregation. In port failover mode, running multiple uplink cables gives you a level of redundancy to survive a single port failure on either the access point or the uplink switch, increasing the overall reliability of the system.
- Related Posts:
Gartner Wireless & Mobile Summit… In Review (Part #1 of 2)
I was able to get a copy from a couple of the applicable sessions delivered at Gartner’s Mobile and Wireless Summit this past week. However, I didn’t attend in person – see my rant “Can IT Vendors be Objective?”
The first session I reviewed is entitled “The Next Generation WLAN: Time to Throw Out the Rule Book?” It was delivered by Michael King and Timothy Zimmerman, who as you may know, create the Gartner Magic Quadrant for WLAN Infrastructure.
For me, here are the most interesting observations:
- The presentation starts off saying that 802.11n networks are faster, cheaper, and better managed than the wired infrastructure deployed in most enterprises today. Additionally, they said WLANs are more secure and more reliable.
- The speakers predicted that 70% of new access layer switch ports will be WLANs within the next three to five years.
- In the notes to the slide containing the Gartner “Magic” Quadrant was the following advice: “To evaluate vendors is the leader’s quadrant and ignore those in other quadrants is risky, and thus discouraged.”
- There were two excellent points in the action plan (conclusion):
- For near future, there is not a dominant architecture for wireless offices. Enterprises should standardize networks on a few device models to keep support cost down.
- Enterprises should align networking investments to an all-wireless office, plan for the deployments in the next 12 to 24 months.
Personally, I think the authors hit a home-run with this presentation. The points above really hammered home the need for an all wireless enterprise with fewer devices. What do you think the wireless landscape will look like in the next three to five years? What do you see as the prevailing WLAN architecture?
Part #2 of 2 will focus on a presentation given by Nick Jones, Jackie Fenn, and Monica Basso entitled “Online Society 2020”.
Related Posts:
*Speaking Engagement* – FREE Webinar March 24th
I am giving a Webinar on Replacing Ethernet Switching to the Desktop with Wireless on March 24th, 2009 4PM Pacific Time.
Below is information about the presentation, including the link to attend along with a session description.
Webcast Title: Is WiFi Really Ready to Replace Ethernet to the Desktop?
Webcast Live Date & Time: 4:00pm MAR 24 2009 United States – Los Angeles
Duration: 45 mins
http://www.brighttalk.com/webcasts/2805/attend
Session Description – Is WiFi Really Ready to Replace Ethernet to the Desktop?
Ratification of the next generation IEEE wireless standard, 802.11n, is just around the corner. 802.11n brings data rates of several hundred megabits per second, which many analysts say is instrumental in WiFi replacing Ethernet switching to the desktop. But is wireless really a capable replacement? Our speaker, Mr. Douglas Haider, will explore the performance, security, scalability, and reliability of next generation wireless LANs. Mr. Haider will address both the technical and business requirements of the audience. The presentation is built around a case study and is packed with specific recommendations, suggested tools, and information on where to find additional resources.
Can IT Vendors be Objective?
Here is another guest post that I wrote for An Information Security Place. This is something that I am worked up about, so I am re-publishing it here to maximize the audience. 🙂
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Can IT Vendors truly be objective? Or does everything they say have to be viewed through a lens of “they are trying to sell me something”?
Join me while I rant…
Personally, I think IT vendors can be objective.
Sure, we manufacture and sell things…
*Gasp* – We even profit from selling.
But that doesn’t mean we can’t be objective.
i.e. – I try to provide solid vendor-neutral information to the wireless community through my blog, http://wifijeidi.com.
(In fact, only 2 of the nearly 40 blog posts I have completed to-date have been about my employer, Xirrus.)
However, not everyone sees it that way.
Let me give you an example…
I requested press access to an industry event as a blogger.
However, I was told that I can’t get a pass of this nature because I work for a vendor.
Furthermore, I was told that bloggers of major publications (ComputerWorld, Network World, ZDNet, etc.) would qualify.
So I went out seeking a spot with one of these publications as one of their bloggers.
(I even had a solid lead directly to an editor with a reference from another well know blogger at one of these publications.)
However, I was turned down again. Because I work for a vendor.
My “commentary”…
Presumably, working for a vendor means that I can’t be objective. Which I personally think is %^&$*&!
Let’s take a look at some profiles of bloggers who have been picked up by these publications. I would like to take a closer look at two common blogger profiles: Value Added Resellers (VARs) and Independent Consultants.
I have noticed that if you work for a VAR, you can blog for major publications. Correct me if I am wrong – as a VAR, don’t you sell some vendor’s equipment, but not others? It would seem to me, in that position, it is possible to have nuances or conflicting agendas. At least working for a manufacturer, you know where my “official” loyalties are.
Other common profile for bloggers on these publications is that of an “independent” consultant. I would think a large portion of their livelihood depends on their ability to provide consulting services. If that’s the case, don’t you think they would blog about things that (at least indirectly) drive their own business? After all, their financial success is directly tied to the success of a single person – themselves. Working for a manufacturer (or any large organization) mitigates this factor because my financial situation is determined by the success of the group, and not by what I do or say to drive my own consulting business.
This isn’t intended as an attack on publications or their bloggers, just an honest discussion of how they can be objective, but somehow it is perceived that I can’t. What about my credentials?!?
Besides working for a vendor (for several months), I have also worked as a consultant and auditor (for many years). I hold over a dozen IT certifications, ALL of which are vendor-neutral. On my LinkedIn profile, I have the coveted “500+ connections”, many of who are employed by my competition – Aruba, Meru, Motorola, etc. I started my blog to serve as a thought leader and I am a frequent speaker at industry events, professional organization meetings, and universities.
If you know someone at an IT publication that is willing to have me as a wireless networking and security blogger, have them contact me at douglas.haider@xirrus.com
Wait, I had better not use my corporate email address. That might signal I can’t be objective. 🙂
Instead, have them contact me at douglashaider@hotmail.com
SANS Phoenix – Update
A couple weeks ago, I wrote a post announcing that I will be taking the Security Leadership Essentials course at SANS Phoenix, 2009. The conference is being held March 23-30, 2009.
I will be blogging about the event, so check back around that time to hear my thoughts on the course! As I said in my previous post, I am participating in the SANS Work-Study program, which I think is a tremendous value.
I am excited about two updates to my conference registration. First, I am also taking the SANS 2 day course on the Payment Card Industry (PCI) Standard. Second, I am getting access to the SANS On-Demand training for both of these courses. On-Demand is another cool option for training in this economy – solid computer based training with no travel costs! Both of these are included with my registration under the work study program!
Have you taken a SANS course? What did you think? What do you think of SANS? A couple of years ago, there was a session at ShmooCon entitled Anti-SANS (or something of the sort). It was a very spirited debate to say the least. I would love to hear what you think of SANS – good, bad, or indifferent!
802.11n Poll Question
Take other polls at WiFiJedi.com:
A One-Two Punch for RFID at Wal Mart
The “one” in the one-two punch was the restructuring that Sam’s Club did this Janurary with regards to its pallet, case, and item level tagging initiatives within their supply chain. Here are the highlights:
- Deadlines for compliance were dramatically extended
- Fines were reduced to 4% of their previous level
- Case level tagging requirements, which were originally proposed to be in-place by Oct 31, 2009 are now optional
Now comes the other punch to RFID implementation within Sam’s Club and Wal Mart… Earlier this week, RFID Update and StoreFront BackTalk released stories about Procter & Gamble’s decision to end its program to tag promotional displays with RFID to ensure they were placed on store floors at appropriate times.
Most of the analyis surrounding the story speculates that it was the people and the processses that failed, not the technology. While this many very well be true, I personally see it as another large step back for RFID. I agree that the technology is fundamentally sound – especially with improvements made over the last couple of years with regards to standards, security, and scalability. I even think that the technology will continue to get better over time.
However, lack of acceptance and breakdowns in processes highlight larger business issues have to be solved before we will see wide spread adoption of RFID. Technology alone is not good enough.
I believe if we can’t successfully tag promotional displays, we are a *long* way off from realizing RFID’s “full” potential, such as smart shelves with item-level tagging.
Here are some other great RFID posts on WiFiJedi.com –
Lastly, one of my blog readers reached out and asked if I could promote one of his events. The information is below:
RFID in Healthcare Consortium Presentation:
“Challenges & Rewards of Wireless Technology in Health Care”
Washington, DC March 10 & 11, 2009-02-18
Xirrus to Deliver INTEROP’S 802.11n Network
Here is a Xirrus Press Release that I think has value to my readers (and one I am particularly excited about). Xirrus was selected as the official wireless provider for INTEROP in both Las Vegas and New York! I know that back in Oct 2008, Xirrus also provided a high density wireless network for Microsoft’s Professional Developer’s Conference where several industry records were broken, including:
- Most concurrent users in a single room: 2,890
- Most concurrent users on a single device: 562
- Most bandwidth in a single room: 9.7 Gbps
At any rate, the INTEROP Press Release is below.
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Thousand Oaks, CA – February 10, 2009 – Xirrus, Inc. the Wi-Fi “Power Play” that delivers the most wireless coverage, bandwidth, and throughput in the industry announced today that they have been selected to be the official wireless provider for Interop Las Vegas (May 17-21, 2009) and New York (November 16-20, 2009). Xirrus will deliver the 802.11n network for Interop attendees and exhibitors throughout the Mandalay Bay Convention Center in Las Vegas and the Jabob K. Javits Convention Center in New York. This is the fourth time Xirrus has been chosen as the InteropNet wireless provider due to the power and simplicity of our Wi-Fi Array platform.
“Over the past two decades, Interop has advanced the growth and evolution of the IT industry – this year is no different,” said Lenny Heymann, General Manager of Interop. “Thanks to Xirrus, we can continue to use the latest standards like 802.11n -based network-a network that will deliver vast amounts of bandwidth to thousands of concurrent users.”
The Xirrus Wi-Fi Array integrates 4, 8, 12, 16, or 24 abg+n radios with an onboard Gigabit Switch, Wi-Fi Controller, Wi-Fi Firewall, dedicated Wi-Fi Threat Sensor, and Spectrum Analyzer into a single device. Xirrus’ solution delivers 4X the performance and coverage along with 75% less devices, cabling, switch ports, and installation time compared to traditional access points because unlike access points the Xirrus Wi-Fi Array utilizes segmented directional antennas to better utilize and manage the RF energy of the device.
“Providing the 802.11n Wi-Fi network for this prestigious gathering of IT experts is an honor and demonstrates the strength of our Wi-Fi architecture in challenging environments such as Interop,” said Dirk Gates, Founder and CEO of Xirrus. “Distributed Wi-Fi architectures, like the Xirrus Wi-Fi Array, are overtaking centralized architectures the same way Ethernet overtook ATM in the 1990’s. The distributed intelligence and simplicity of our Wi-Fi Array allows us to quickly deploy a network with significantly fewer devices and provide exhibitors and attendees with the highest performance possible for voice, video, and data.”
Interop runs May 17 through 21, 2009 at the Mandalay Bay Convention Center in Las Vegas, Nevada. Xirrus will showcase its 802.11n products at booth #1331. More information is available at www.interop.com
Adventures in Capturing Wireless Packets
Just a quick FYI for those *true* WiFi packet analysis junkies out there – I installed OmniPeek Professional 5.1.4 on my HP 6910 laptop. The software “works” with embedded Intel wireless NIC, but reports invalid data rates for 802.11n traffic.
The work around that I came too was to purchase a 3rd party, dual-band 802.11n USB adapter that has a supported API within the OmniPeek software.
I also have an AirPcap Nx device from CACE Technologies that I like *very* much – USB form factor that allows for wireless packet capture in Windows. AirPcap integrates directly into Wireshark, which is nice since I “grew up” taking wireless captures in Lib PCAP format under Linux and looking at them in Ethereal.
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