802.11a Mesh Outdoors with 5500 controller

Hi
I am working on a project that will involve 5500 controllers managing 1260 series N rate A/Ps. There may be a requirement for MESH but my previous experience using Motorola 802.11a radios is that random, intermittent radio detections resulted in the MESH network having to keep re-forming resulting in less than 100% availability.
What's peoples experience in the UK is 802.11a outdoors?
Ideally i would prefer to use 2.4GHz and repeater access points for those areas not serviced with data connection but I cant find any info' so far on how whether the 5500 controller is able to manage repeater access points.
Any guidance or experiences much appreciated
Steve

I don't live or have done work in the UK so can't answer your first question, but for your other question... The wlc does not manage any APs configured as a repeater.
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Similar Messages

AP is unable to associate. The Regulatory Domain '-E' configured on interface '802.11a' does not match the Controller Regulatory Domain '-C'

Hi,
There are three different types of APs associated with controller and working fine.
1.       AIR-LAP1252AG-E-K9
2.       AIR-LAP1522AG-E-K9
3.       AIR-CAP1552E-C-K9
WLC is AIR-CT5508-K9. Software version is 7.4.100.0. Field Recovery Image is 7.0.112.21. Firmware version is FPGA 1.7, Env 1.8, USB console 2.2. WCS is 7.0.240.0 for Windows.
WCS is sending alarms for AIR-LAP1522AG-E-K9:
Message: AP is unable to associate. The Regulatory Domain '-E' configured on interface '802.11a' does not match the Controller Regulatory Domain '-C'.
Before Controller was 7.2.4 (not sure).
Country configured on WLC is AE and shows -CE regulatory domain. Mesh APs are also associated.
I believe this Critical alarm should not come.
how much is this alarm important? What should be done to resolve this?

Typically you still need to make sure that the country codes are indeed configured on the WLC. Thing can change when you upgrade code as standards might of changed and regulations also. If your AP's are functional, then you should be okay and I wouldn't worry too much about it, but if after the upgrade, the WLC complains about country code stuff, then you just need to verify that the AP's country code is defined on the WLC. May times the AP will not join and if it does join, the radios might be disabled or in a down status.
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Does airport extreme 802.11a/c work with airport express 802.11n

does airport extreme 802.11a/c work with airport express 802.11n

"You can use the AirPort Express to extend the signal provided by the new AirPort, but the Express will not extend "ac" wireless since it does not have that capability. The Express will extend an "n" wireless signal if that helps."
This is what I am trying to understand.
So AXTRM w/ sep SSID for 2.4 (b/g/n) - call it SSID1 - and 5GHz (ac) call it SSID2 - WiFi Explorer confirms AC mode on 5G.
Using an AXPRESS to extend - I have the option of SSID1 b/g/n *and* the 5GHz ac SSID2 in the pulldown (it sees both?) --> if I select SSID1, it also extends this same SSID in 5GHz (both showing b/g/n) >> so I now have 3 signals on SSID1 (XTRM 2.4G, XPRS 2.4G and XPRS 5G) b/g/n and one signal on SSID2 (XTRM 5G AC) ac
If I select the 5Ghz ac SSID2 to extend - it prompts me "do you also want to extend (the 2.4GHz SSID1)?" --> select yes and I now have 2 signals for SSID (XTRM 2.4G & XPRS 2.4G) b/g/n and 2 signals on SSID2 (XTRM 5G 802.11ac & XPRS 5G 802.11 a//n)
Is the 5G SSID2 actually being extended from the Airport Extreme to the Express?
The reason I bring this up is I am having a lot of issues since iOS8 came out (especially on iPhone 6). Everything I am reading is pointing to when people have 2 AP's set to use the same SSID. When you walk to a part of the house where 5G 802.11 ac signal marginalizes, the phone does not immediately hand over to the 5G 802.11 a/n Airport Express.
My thought was separate the SSID's but to me, if the Express can't extend 5Ghz from the Extreme, it's taking a step backwards. I am better off getting a more powerful router like an ASUS and going with one AP, drop the WiFi roaming altogether
Any thoughts?

Remote Mesh AP with Centralized Controller

Need help to clarify this technical requirement. we are in the midst of designing a wireless Mesh AP solution for our customer.
Customer Requirement:-
1. Customer wants to deploy REmote MEsh APs (1500 Series) with a centralized 4404 Controller at HQ site.
2. The Remote and HQ site is linked thru a leased line with 2 routers in between
Based on cisco's document REAP and HREAP is not supported in LWAPP Mesh APs. So if the Mesh APs were to be deployed at Remote sites (3 total). How this be achieved?
Your input would be very much appreciated.
Thanks.

Well since the mesh AP's don't support h-reap, you would have to run them like local mode AP's. So depending on your WAN connection/bandwidth you can possible achieve this. Currently the mesh isn't designed or remote site wireless, since there is no h-reap function, but you can get it to work if you have a good wan connection.
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1552 in P-MP acting as 802.11a Wireless Bridge with single antenna SISO

Can you configure three Cisco 1552EUs to act as a RAP and two MAPs in a bridge only Point to Multipoint configuration.
I'd like to disable two of the 5Ghz antenna ports and use just a single TX/RX port and a single directional antenna for each AP.
Does this simply reduce the system gain because you lose the MRC MIMO advantage / gain of either 1.7 or 4.7db (depending on qty of spatial streams).
Also, are the 1552EU's backward compatible with the Cisco 1310's in the configuration mentioned above.
Thanks for any comments.

The transfer speeds sound about right. The "54Mbps" is a signaling rate, not a throughput.
To make 802.11 wireless "reliable" (comparable to a wired network) the data is, in effect, sent twice and staggered such that a glitch usually doesn't get both.
In terms of throughput of your data, a strong signal with good signal quality, using IP, unencrypted should run ~22-26Mbps (some variability for noise/interference, mixed frame sizes, TCP ACK times, application responses, etc).
So, at ~24 Mbps (megabits per second) you're looking at ~4 megabytes per second versus 100Mbps/12.5mBps as a probable max rate.
Given that, a transfer that takes approximately one minute on a wired network under typical conditions ... having it take four-to-five minutes on a typical wireless system is about right.
For power settings, you can adjust the power by monitoring the RSSI values on the receiving system. If I can find the docs on Cisco's main site I'll post 'em up later (gotta run ...), but if the mechanical install is good, then it'll just be a little keyboard work.
Good Luck
Scott

AP1042 802.11a/n/ac Radios down in the controller

802.11b/g/n Radios is up but 8021.11a/n/ac radio is down.   802.11a netowrk status is already enabled. Not too sure what may most likely be causing it to down?
Below is the output of "show sysinfo" from the controller and "show version" from the AP
Any input is appreciated.
Thanks Cathy
Manufacturer's Name.............................. Cisco Systems Inc.
Product Name..................................... Cisco Controller
Product Version.................................. 8.0.100.0
RTOS Version..................................... 8.0.100.0
Bootloader Version............................... 8.0.100.0
Emergency Image Version.......................... 8.0.100.0
Build Type....................................... DATA + WPS
System Name...................................... wlc01
System Location..................................
System Contact...................................
System ObjectID.................................. 1.3.6.1.4.1.9.1.1631
IP Address....................................... 172.20.0.102
IPv6 Address..................................... ::
System Up Time................................... 3 days 1 hrs 57 mins 9 secs
System Timezone Location......................... (GMT+10:00) Sydney, Melbourne, Canberra
System Stats Realtime Interval................... 5
System Stats Normal Interval..................... 180
Configured Country............................... AU - Australia
--More-- or (q)uit
State of 802.11b Network......................... Enabled
State of 802.11a Network......................... Enabled
Number of WLANs.................................. 2
Number of Active Clients......................... 1
Burned-in MAC Address............................ 00:0C:29:ED:49:8A
Maximum number of APs supported.................. 200
System Nas-Id.................................... Cisco_ed:49:8a
TestAP#show ver
Cisco IOS Software, C1040 Software (C1140-K9W8-M), Version 15.3(3)JA, RELEASE SOFTWARE (fc1)
Technical Support: http://www.cisco.com/techsupport
Copyright (c) 1986-2014 by Cisco Systems, Inc.
Compiled Fri 15-Aug-14 13:14 by prod_rel_team
ROM: Bootstrap program is C1040 boot loader
BOOTLDR: C1040 Boot Loader (C1140-BOOT-M) Version 12.4(23c)JA6, RELEASE SOFTWARE (fc1)
TestAP uptime is 40 minutes
System returned to ROM by power-on
System image file is "flash:/c1140-k9w8-mx.153-3.JA/c1140-k9w8-xx.153-3.JA"
Last reload reason:
cisco AIR-LAP1042N-A-K9 (PowerPC405ex) processor (revision A0) with 98294K/32768K bytes of memory.
Processor board ID FGL1707S3P4
PowerPC405ex CPU at 333Mhz, revision number 0x147E
Last reset from power-on
LWAPP image version 8.0.100.0
1 Gigabit Ethernet interface
2 802.11 Radios
32K bytes of flash-simulated non-volatile configuration memory.
Base ethernet MAC Address: 00:06:F6:3B:A9:F7
Part Number                          : 73-14034-06
PCA Assembly Number                  : 800-34273-07
PCA Revision Number                  : A0
PCB Serial Number                    : FOC17015X6X
Top Assembly Part Number             : 800-34285-05
Top Assembly Serial Number           : FGL1707S3P4
Top Revision Number                  : A0
Product/Model Number                 : AIR-AP1042N-A-K9

Configured Country............................... AU - Australia
WLC is configured for Australia (-N for AP1042).
Product/Model Number : AIR-AP1042N-A-K9
AP Regulatory Domain is for USA (-A).
This is the reason why your AP's 802.11a radio is permanently disabled. Unfortunately, the Wireless LAN Compliance Status (06 October 2014) doesn't list old-model APs. And this doesn't help anyone.
You may need to contact your vendor and ask them politely if it's possible for you to replace your AP with the ones with the correct Regulatory Domain.

802.11a outdoor antenna

Hello,
I have to cover an outdoor area with wireless (802.11b/g). Due to the lack of wired infrastructure I thought of building a backbone using 802.11a.
In my area (ETSI) there are only specific 802.11a frequencies allowed for outdoor use (5470-5725).
How do I configure an AP1242AG to use only this frequencies?
What would be the best antenna to build the 802.11a backbone (there is nothing suitable in the cisco portfolio)
regards
HMK

Diversity is generally only needed in situations where you encounted multi-path interference, so if you have lots of metal in the area (for example) then it might be worth a go. If you go with diversity, I THINK you're supposed to keep the antennae about a wavelength apart, so ~12.5cm.
For the 5GHz links, try to keep the TX and RX antennae the same gain, although it's likely you'll need an omni-directional for your Root Bridge, and directional antennae for your None-Root Bridges. If you have different gains at the root / none-root, you can encounter problems with transmit power mis-matches - one AP can hear the other, but not vice versa.
The 1400 comes with a built-in directional antennae, or with connectors for adding external antennae. Most importantly though, it is rated for outdoor use, where as the 1240 is an indoor AP, which will therefore need cables running between the AP & Antenna.
2.4GHz antennae is entierly dependant upon AP positioning, coverage requirements, etc. 2506 is probably a good place to start if you're not very experienced with spec'ing antennae.
Regards,
Richard.

802.11a/g/n optimizing for compatibility

How to ensure maximum client compatibility and stability in 802.11a/b/g/n networks?
I am running a Wireless network based on the WLC 5508 6 SW version, (with WCS mgmt) and 1142 APs. I would like a broad variety of clients, old G clients and new N clients to experience a stable connection to the network. I see Apple Macbooks, Lenovo-, Dell- and HP laptops in addition to HTC smartphones and iPhones on this network.
I am having issues with some types of clients experiencing "unstable" connections. They are able to get a link for a variable ammount of time, then suddenly loose connection for a short period of time before reconnecting. These clients mostly use a third party SSL-VPN link over my wireless, therefore the loss of connection can be quite annoying. From time to time some of these clients seem to be flapping between access points but not seamless like roaming should be, rather with a short stop in connectivity before reconnecting.
Previously we had a 802.11g Aruba wireless network in the same location. It had no such difficulties. This points me toward the config parametres in the controller.
Which 802.11 b/g/n and WLAN parameters can affect this? I am looking for a document describing a best practice for setting up these parameters, or if someone here has input to a successful stable setup as the configuration guide only says e.g. "Enable if you want Aironet Information Elements" does not help in deciding if I want this
My WLAN is set up with WPA2/AES PSK
and a guest network with web auth
Examples of parameters:
which Radio policy (bgn or gn)
Aironet IE?
MFP (disabled or enabled)
QoS profile?
can CCX location measurement affect performance?
Which Data rates should be set mandatory/enabled/disabled?
MCS (data rate) settings for 802.11n
anything I have forgotten?
The goal is:
A simple, no hassle network providing maximum compatibility with different clients with a plus of 802.11n speeds for compatible clients
wbr
-LA

Hey! I implemented your suggested improvements and the first impression is good!
on 802.11a and b/g I disabled lower datarates, set 12Mbps to mandatory and the higher ones to supported. The instant improvement was the RTT measurements I made (previously they averaged at about 13ms (to an internet site) after the change they dropped to about 3-4 ms on average! I would say this is a very significant improvement!
I have not been able to get any feedback from the user community yet :), but it sounds promising...
I am still looking for some more insight into these issues, so if someone still has some ideas, please let us know!
-LA

Need to admin disable 802.11a radio from a few light weight access points

Hi team,
I need help to admin disable the 802.11a radio interface from a few lightweight APs. The operational status of these radio interfaces is down, so I am getting the following error when I try to disable them from the wireless LAN controller.
(Cisco Controller) config>802.11a disable wds2.hyd.shaw.net
This slot is not operational because Regulatory Domain Check has failed! Unable to disable the Cisco AP.
Could you please let me know how I can administratively disable the 802.11a radios on these APs? Please let me know if you need more details here.
Regards,
Swati

The two previous posts are correct: the regulatory domain is probably not allowing radio a to be enabled.
To be sure about this you can go to GUI of the wireless LAN controller > Wireless > Country. Here your country (or region) should be selected. Then depending on the access points that you have they may or may not join or turn on the radio. Per example if you have an access point from Europe (like AIR-AP1131AG-E-K9) then you will have a conflict if only the “America” regulatory domain (-A) is selected.
Here is a link with a list of products and their regulatory domain that might help:
http://tools.cisco.com/squish/648C8
What you can do here is to simply allow the regulatory domain that the access point needs and you should not have any problems.
IMPORTANT NOTE: If you change the regulatory domain and use an access point that transmit at certain channels and frequencies that are not allowed (illegal) in your country (region) you may have legal implications.
I hope this information helps you with your concern.

All of the 802.11a performed down so many time

Hi all:
I encounter a problem on mesh wireless system. All of the 802.11a on RAP are "administritivity down" after few hrs or mins of startup.
After i check the "show controller Dot11radio 1" it shows "Last radio rest code : 49"
Could some one help me on this? My country code is Saudi arabia. And Both 802.11a/n and 802.11 b/g/n

1. I found there are 2 frequencies wild in the list, 20hz and 40 hz, which one is better ?
> 40mhz will combine two adjacent 20mhz channels, so in your case maybe 20mhz
2. I check the country code from the list, that Saudi is in -E zone, how to move to -M ?
> YOu can add a country code on the WLC, but you can't change an access point contry code
3. In 802.11a TPC option, i found 2 options. one is coverage optimize V1 , another is interference optimize V2. Base on my current situation, which one is better ?
> DO not use v2
4. I found some channels have heavy radar signal interference, how can i exclude them to channel list.
> In the DCA list, you can choose the channels you want. You can find the info here:
http://www.cisco.com/en/US/products/ps6366/products_tech_note09186a0080a3443f.shtml
Thanks,
Scott
Help out other by using the rating system and marking answered questions as "Answered"

RRM misconfiguration on 802.11a/n radio

I am working on tunneling a wireless network with the following components:
wlan-controller-14-4 impa-wireless4 --> AIR-WLC2106-K9
wlan-controller-14-2 impa-wireless2 --> AIR-WLC2106-K
11 AIR-LAP1131AG-A-K9
10 AIR-LAP1252AG-T-K9
They are geographically distributed on four floors in the same building.
Controllers and APs have the same sw version respectively.
I have configured RRM feature on both 802.11 a/n and 802.11 b/g/n
RRM feature on 802.11 b/g/n is working fine.
RRM feature on 802.11 a/n is unable to set different values for power conveniently.
All 1252 APs have been set to power equal 1.
Six Aps have been set to channel 149 even if they are neighbors (same floor or on correspondent position on other floors)
debugging client mac 50:cc:f8:86:80:7e I have gotten:
debug mac addr 50:cc:f8:86:80:7e *dot11a: Apr 07 16:39:36.537: Airewave Director: Processing Interference data on 802.11a AP 58:8D:09:1E:33:B0(1)
*dot11a: Apr 07 16:39:36.538: Airewave Director: Processing noise data on 802.11a AP 58:8D:09:1E:33:B0(1)
debug mac 50:cc:f8:86:80:7e*dot11a: Apr 07 16:39:36.540: Airewave Director: Processing Interference data on 802.11a AP 58:8D:09:1E:33:B0(1)
Any idea?
Tks Rosa

Hello
This is sort of like a testbed setup, so can you tell me which country/reg domain I can set on my controller in order to make our access point work. There is only one AP connected to this controller.
LAP: AIR-AP1252AG-N-K9
Also as per the guide, we can configure the country on a per-AP basis, would this be a viable option?
http://www.cisco.com/en/US/docs/wireless/controller/5.2/configuration/guide/c52lwap.html#wp1147805
Regards
Farrukh
P.S I think South Africa is ZA

WLC 802.11a/n Radio Regulatory Domain Issue

Dear All
We are facing an issue with a customer where a Cisco 4400 Series controller is blocking the 802.11a/n Radio Interface of a 1250 AP. The radio shows as down on the controller GUI. The error message on the GUI is that the 'Regulatory Domain' is not supported. This can be seen from the attached screenshot. Also relevant parts of the WLC configs are attached.
WLC: Cisco 4402 Wireless
WLC Country: SA
Device: Cisco Lightweight Access Point 1250 (LAP) is controlled through the 4402 Cisco Wireless LAN Controller (WLC)
The operating system version of the LAP: c1250-k9w8-mx.124-18a.JA version of the WLC: Software Version 5.2.178.0
The problem is that the controller shows that the 802.11a/n Radio Interface in Radio Slot # 1 is always down , the customer tried to manually 'no shut' the AP interface from the console and it worked , but obviously this solution would not work as the configuration cannot be saved (LW AP).
Any help or pointers would be greatly appreciated.
Regards
Farrukh

Hello
This is sort of like a testbed setup, so can you tell me which country/reg domain I can set on my controller in order to make our access point work. There is only one AP connected to this controller.
LAP: AIR-AP1252AG-N-K9
Also as per the guide, we can configure the country on a per-AP basis, would this be a viable option?
http://www.cisco.com/en/US/docs/wireless/controller/5.2/configuration/guide/c52lwap.html#wp1147805
Regards
Farrukh
P.S I think South Africa is ZA

Non-overlapping channels - 802.11a/n - need clarification

There seems to conflicting or inconclusive information the topics below. I have just been readying various docs using google searches. I am hoping to get some solid answers.
1) What channels for 802.11a are really non-overlapping? 8 or 12? I have read in some sources that it is 12 but the last 4 are for outdoor use(?).
2) in regards to 802.11a, channels 149 - 165 are considered for outdoor use so indoor availability is only 8 channels, correct?
3) What would be the non-overlapping channels for 802.11n? Indoor use only.
4) What happens when an 802.11n/a device and a traditional 802.11a device connect to the same network?
Thank you,

Hi Jacob,
Following diagram should helps you (Ref source )
Referencing this & if you look at your 4 queries you can find the proper answer. Here is my response
1) What channels for 802.11a are really non-overlapping? 8 or 12? I have read in some sources that it is 12 but the last 4 are for outdoor use(?).
As you can see, excluding UNII-2 extended there are 12 non overlapping channels (13 including CH165), depends on the different country regulations you can use those for indoor/outdoor deployments.
2) in regards to 802.11a, channels 149 - 165 are considered for outdoor use so indoor availability is only 8 channels, correct?
It depend on the courntry regulation. I think in US you can use that band(UNII-3) for both indoor/outdoor deployments. So in that case 12 CH availabel excluding UNII-2 extend band.
3) What would be the non-overlapping channels for 802.11n? Indoor use only.
802.11n in this band, you can aggregate two 20MHz channel, (effective 40MHz bandwidth). You can see 6 non-overlapping channels available with 40MHz width in those bands (80MHz & 160MHz option shown in the above diagram applicable to 802.11ac standard)
4) What happens when an 802.11n/a device and a traditional 802.11a device connect to the same network
802.11n device will communicate with 40MHz (if configured on you wireless network & client support channel bonding) & normal 802.11a client will connect using 20MHz channel without any CH bonding or aggregation
If that answers to your query pls mark this thread as "Answered"
HTH
Rasika
**** Pls rate all useful responses ****

802.11ac wifi speeds with the BCM4360 chip and broadcom-wl driver

Hello,
First, some preliminary information:
I'm currently in need of a wireless adapter for my desktop computer. I recently got an Asus RT66U router, so I'm looking for a wireless adapter that supports the 802.11ac standard. The best candidate I've come across is the Asus PCE-AC68, and PCIe based adapter that uses Broadcom's BCM4360 chip, the same wifi chip used in the Late 2013 retina Macbook Pro. It is worth noting that every available 802.11ac compatible PCIe based wireless adapter seemingly uses this chip (I've heard of people having success with 802.11ac speeds using Qualcomm Atheros based wifi adapters and the ath10k driver, but there are no Atheros-based PCIe wireless adapters on the market, as far as I can tell).
The Broadcom BCM4360 chip is not supported by the b43 driver, and I believe it also isn't supported by the brcmsmac driver, since it isn't listed here.
This leaves me with the proprietary broadcom-wl driver, which is listed as supporting the BCM4360.
What I'm interested in learning is how a wireless adapter based on the BCM4360 will perform using the broadcom-wl driver--I don't want to buy a wifi adapter that won't work at its full capacity, after all.
I have found user reports here and here from April 2014 stating that the driver runs BCM4360 based adapters in 802.11a/b/g mode and doesn't allow 802.11n and 802.11ac connections to be made. On the other hand, this user (in a post from June) states that he managed to get ac speeds in Arch simply by changing his router settings. Unfortunately, he doesn't detail what changes he made.
I'm hopeful that the driver was simply updated between April and June and that now BCM4360-based wifi adapters can run at 802.11ac speeds, but as it's closed source, I can't check the commits, and have not been able to find any discussion more recent than what I linked above.
Has anyone had success getting 802.11ac speeds with BCM4360-based wifi adapters and the broadcom-wl driver?
Last edited by aliwho (2014-07-18 22:02:40)

I am currently using the BCM4360 (rev 03) in a MacBook Pro. You are correct in that it does not work with the b43 driver. It mostly works with the proprietary wl driver. I am using the broadcom-wl AUR package. I can confirm that 802.11n works. I am connected right now at 324Mbps (3 .11n spatial streams). I have not tried 802.11ac yet. I will soon, so I will report back.
As for the caveats, it doesn't like 802.1X networks very much. To get it working using wpa_supplicant, I have to reload the wl module. Sometimes when I reload it, it comes back as wlan0 instead of wlp3s0. No idea why. Yet, when I tried it with Network Manager on an Ubuntu live environment, it worked fine. YMMV. It always works fine for me at home on a WPA2-PSK network. If I can pin down something with more consistency, I'll let you know.
For reference:
$ lspci -vnn | grep Network
03:00.0 Network controller [0280]: Broadcom Corporation BCM4360 802.11ac Wireless Network Adapter [14e4:43a0] (rev 03)
According to kernel.org, BCM4360 could be either 14e4:4360 or 14e4:43a0
Last edited by jumperpunk (2014-07-30 17:09:43)

Force MacBook Air 10.5.8 to connect to 802.11a

Hi,
Is there a way to force my MBA to connect to an 802.11a AP?
I am troubleshooting an MBA wireless connection problem. As such I would like to try & force it to connect via an 802.11a AP, since 802.11a is less susceptible to interference. While troubleshooting I have located & begun using “Airport Radar” and “AirGrab WiFi Radar”, which provide more useful information than the Airport icon.
Yesterday, my MBA connected to an AP which was about 100 feet away. And it connected to it via 802.11b/g. The connection was poor, in that it would periodically drop the connection. I turned off Airport & turned it back on. Then it connected to an AP located by myself, which was about 15 feet away. And, it connected via 802.11a. This stayed connected without problems for at least two hours. I verified this via my Cisco WCS "AP Association History".
Thanks for any help anyone may provide. While I have experience with Fedora & Windows, I'm still learning MBA.

Thank you for the reply.
I do not want to change the configuration of my Cisco Access Point to exclusively use 802.11.a. I have a mixed environment of Windows & MAC client laptops. I have a few MBA's that seem to have a problem with wireless connection. They have reported weak signal, slow response, etc. I've set up an MBA at my desk, & monitored its connection. I have monitored it using "Airport Radar" and "AirGrab WiFi Radar" on the MBA. And, I have monitored my MBA connection from the standpoint of my Cisco wireless network using Cisco's Wireless LAN Controller (WLC) and Cisco's Wireless Control System "WCS". It was from the perspective of my WCS that I discovered my MBA had connected via 2.4GHZ to an AP that is 100 feet from my desk. I turned off my Airport & cycled it back on. It then connected to an AP that is 15 feet from my desk at 5.0GHZ. This connection stayed up for at least two hours without any problem. I know that 2.4Ghz is more susceptible to interference than 5.0Ghz. So, I would like to try & force my MBA to connect at 5.0Ghz & perhaps to the specific AP located closest to my desk.
Thanks again for your suggestion.

802.11a Mesh Outdoors with 5500 controller

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