802.11n greenfield in a mixed environment

we plan to have mixed 802.11n deployment coexistence with a/b/g clients. But we want to have some classrooms or labs to run greenfield only where people request 100Mbps bandwidth to transfer large images. What is the best practice to design some small greenfield areas in the mixed environment? And what is the best way to prevent 802.11a users to associate to our 1140s?
Thanks!
Zhenning

Have a read on the the link below and let us know if the problem and/or solution can solve your issue.
http://forum.cisco.com/eforum/servlet/NetProf?page=netprof&forum=Wireless%20-%20Mobility&topic=General&topicID=.ee6e8b8&fromOutline=true&CommCmd=MB%3Fcmd%3Ddisplay_location%26location%3D.2cd28df2/2

Similar Messages

Does Mixing 802.11n with .11g Devices Slow the Whole Network?

Hi all,
I'm considering buying the new Airport Extreme as I also have a new Macbook Pro that supports 802.11n. I also have a couple Airport Expresses on my network, and my question is this:
Will the presence of the Airport Express units (which are 802.11g) drag the whole network into .11g speeds? I ask this because of this note on the Airport Extreme page:
Speed and range will be less if an 802.11a/b/g product joins the network.
Thanks for any guidance.

I did this the same way....
I connected my cable modem directly to the WAN port of my new 802.11n AirPort Extreme Base Station. I have selected 'n' only (5GHz). I call this network Saturn.
There are 3 ethernet ports on this new base station. Wired to one of these ports is my 802.11g Snow Airport Extreme Base Station. This base station will handle any 'g' services (like my friends who are using MacBooks/iBooks/PCs). I have 2 AirPort Express base stations that I use to play music on remote speakers, and wireless printing. It also has 2 Linksys wireless USB 'b' devices that connect to it, which 2 of my TiVos use to get their daily updates. I wanted to keep all of this stuff off the 'n' network since I heard it would slow it down. I call this 'g' network Zodiak. I can see both networks in my AirPort menu, and can select either.
In addition, I have an xBox that I connected directly to one of the wired ethernet ports on the 'n' base station, and I have a Linksys switch that is wired to the 'g' base station.
My only complaint is that I can't get to all of this stuff that is on the 'g' network. Which means, if I want to print something, I need to change my network, if I want to play iTunes out of my stereo speakers, I need to change the network, and if I want to use my TiVo to display photos, I need to change networks. I was hoping I'd still be able to get to that stuff since the 'g' network is hard wired into the ethernet port of the 'n' network. Oh well. I'm only on a 6MB Comcast service, so perhaps I'll try mixing the 'g' network in and seeing how bad it affects performance.
I'm getting 2.5 mb/sec on a hard drive transfer...can't imagine that being much worse on 'g'.

1252 802.11n Throughput, no more than ~140Mbps?

Hello, I have read most of these ports regarding the speed of the 802.11n on the 1252 AP, and can't seem to figure this one out. I have a WISM with a light weight 1252 being powered by a power injector running 7.0.98.0 code. I have everything enabled for 802.11n, and connet with Windows 7 at 300Mbps. After doing many FTP speed tests I can never seem to break the ~140Mbps mark, even after enabling 802.11a 40mhz channel bonding and all the appropriate MCS rates and WMM/WPA2/AES settings. This is a mixed RF environment with clients running a/b/g/n all over. Am I missing something or is really the limit of our environment. I tested 2 different laptops with N cards. My card is an Intel 4965 ABG with latest drivers.
Thanks!

+5 to George. The maximum ever observed in very specific conditions (specific packet size, no one else connected) is around 170/180 "real" Mbps. In a typical real life scenario, reaching 140/150 is good and expected.
For the theoretical explanation, it's the data frame that is sent at 300Mbps. You must also count that EVERY single wireless frame has to be acked by the receiving side, that there are still the beacons and management frames sent at low data rates (1Mbps often, and not 300) and as george said it's half duplex, all in all 802.11a/g offer less than half the speed (20 instead of 54) and with a few protocol improvements 11n offers about really half the speed (150 with 300Mbps data rate).
It's actually the same concept with wired world. Gigabit ethernet means data frames are sent at 1Gbps speed but you have to count the protocol overhead (waiting for tcp ack, etc ...). The difference is that there is very little overhead on wired and it's full duplex so you get very close to 1Gbps.
Hope this clarifies.
Nicolas

Macbook refuses to use 802.11n?

I have an 802.11n router, running in MIMO mode with WPA2/AES encryption, with only two machines attempting to connect to it. Both are running OSX 10.6.5:
My macbook air 1.6GHz (December 2010). This machine connects perfectly as 802.11n, every time.
My wife's 2GHz Macbook 2,1 (I think somewhere around mid-2007 manufacture). This machine has the n extension installed (I can't recall installing it, but network utility shows it as 802.11 a/b/g/n). Whenever I attempt to connect with this machine, connection initially fails, but it eventually connects as an 802.11g connection (as shown by option-clicking on the network icon). When it does connect - not very well - it slows the connection of the macbook air way down.
I'm guessing that if I could force my wife's machine to connect in n mode, everything would be OK. Does anyone have any suggestions?
What I've tried so far:
.deleting and re-enabling the wireless drivers in the network preferences panel
.making a new network location
.deleting all relevant plists
.repairing disk permissions
Relevant background information:
.the 'n' router only supports channels 1-12 (i.e. we can't force n by using non-g channels)
.this network is in a crowded apartment block - I can see around a dozen other networks in istumbler
.the router is using directional paired (MIMO) antennas to bounce the signal from one apartment to another off an adjoining building. Of course, this could in general be problematic; but the received signal strength is OK - not good - according to both istumbler and a separate linux metering program. And the MBA works perfectly well in the same locations.
.it's using channel 1; there are two g networks in the building also using channel 1, but according to istumbler, our signal is strongest of the three in the 'receiving' apartment (in channels 6 and 11, there are other stronger signals, so 1 is the only rational choice).
.the router is running in mixed, not greenfields, mode
.although the MB is only able to connect in g mode, istumbler on the MB still shows it as an 'n' network
.we have never encountered any previous wifi problems with the MB (but this is the first time we've tried to connect it to an n router)
.and just to repeat, the router is using WPA2/AES encryption, which should be compatible with 802.11n
TIA for any help

SOLVED!
Who in the world would have guessed??
Trendnet support provided this information:
<<Note: Due to chipset compatibility issues, if you choose WEP, WPA or WPA2-TKIP encryption this device may operate in Legacy Wireless mode (802.11b/g). You may not get 802.11n performance as these forms of encryption are not supported by the 802.11n specification. >>
I had used WPS2-TKIP, just by accident. I changed it to Authentication WPA-Auto and Cypher type auto, and now it works on 802.11n, as well as g!! Even on my Powerbook G3 and HP laptop.
Who would have guessed?

Airport Drives Me CRAZY! New 802.11n Network Slower Than Old 802.11g/b

I've been using Macs since 1988 and consider myself an advanced user. However, every time I setup a new Airport wireless network or re-configure an existing one, I feel like a helpless newbie trying to figure out how to open a folder on my desktop. No matter how many times I read the manual or the help files or these forums, I can never grasp what seems like it should be a simple path from A to B to C.
Anyway, here's my current situation: I've been successfully (I think) running a 6 year old AP Extreme Base Station [AE] (in my home office addition) and 2 Airport Expresses [AX] (one AX roughly 15 feet from the base station--through sheetrock, and the second AX roughly 30 feet from the first AX--through sheetrock and some wooden stairs. (so roughly 45 feet from AE to 2nd AX). It wasn't the speediest thing going but it did the trick with older Macs.
I recently bought a MacBook Pro which supports 802.11n. I most often use this laptop at the point in the house furthest away from the AE (Base Station) The AE (Base Station) is in my home office connected to my MacPro desktop (see #1 below). In addition, the family iMac is also in that room furthest from the AE. Using the new MacBook Pro with the old 802.11/g/b network turned out to be painfully slow. I was experiencing the same slow network connection my family has complained about for years with their older Macs and 802.11g/b.
I decided it was time to upgrade the whole network, if only to speed up my MacBook Pro connection. Bought new 802.11n Airport Extreme (MC340LL/A) and 2 new 802.11n Airport Expresses (MB321LL/A). Setup did not go smoothly. Again, my normally competent Mac persona was reduced to a babbling three-year-old. Had three different Apple techs on the phone trying to help me through it. Got different, contradictory instructions from the last two. Finally got all three units working, only to find that not only does my MacBook Pro seem even more sluggish than when connected to the old 802.11g/b network, but my wife tells me web pages are taking at least twice as long to load as with the old network.
As concisely as I can lay this out:
*1. Airport Extreme (Base Station)*
Connected via Ethernet from its WAN port to my Comcast cable modem. One Ethernet (LAN) port on that AE is then connected via Ethernet to my Netgear 8-port Ethernet switch. Ethernet from switch to Ethernet port 1 on my MacPro. (MacPro does NOT have an Airport card because I forgot to order one. Also I confirmed that this setup was functional by connecting to the AE wirelessly with my MacBook Pro showing the name I'd given the new network prior to adding the two AX's to the mix).
Some Airport Extreme settings of note (all accessed via "Manual Setup" button):
Airport Tab > Summary
Version 7.5.1
Wireless Mode: Create a wireless network
Channel: 149 (Automatic), 1 (Automatic)
Wireless Clients: 3
Airport Tab > Base Station:
Allow Setup over WAN: Unchecked
Airport Tab > Wireless:
Allow this network to be extended: Checked
Airport Tab > Guest Network:
Nothing checked
Airport Tab > Access Control:
MAC Address Access Control: Not Enabled
Internet Tab > Internet Connection:
Connect Using: Ethernet
Ethernet WAN Port: Automatic (Default)
Connection Sharing: Share a public IP address [Think this one is probably wrong]
Internet Tab > TCP/IP:
Configure IPv4: Using DHCP
Internet Tab > DHCP:
Shows Beginning & Ending Address
Internet Tab > NAT:
Enable default host at: Unchecked and blank field
Enable NAT Port Mapping Protocol: Checked
Internet Tab > Advanced
Didn't touch anything here, so all at defaults
*2. Airport Express #1: Living Room Express (Closest to AE (Base Station)*
Airport Tab > Summary
Version 7.4.2
Wireless Mode: Extend a wireless network
Connect using: Wireless Network
Channel: 1 (Automatic)
Wireless Clients: 1
Airport Tab > Base Station:
Allow Setup over the Internet using Bonjour: Unchecked
Airport Tab > Wireless:
Wireless Mode: Extend a wireless network
Allow wireless clients: checked
Airport Tab > Access Control:
MAC Address Access Control: Not Enabled
Internet Tab > Internet Connection:
Connect using: Greyed-out, not selectable
Connection sharing: Greyed-out, not selectable
Internet Tab > TCP/IP:
Configure IPv4: Using DHCP
Shows IP Address
Internet Tab > Advanced
Didn't touch anything here, so all at defaults
*3. Airport Express #2: Dining Room Express (Furthest from AE (Base Station)*
Airport Tab > Summary
Version 7.4.2
Wireless Mode: Extend a wireless network
Connect using: Wireless Network
Channel: 1 (Automatic)
Wireless Clients: 2
Airport Tab > Base Station:
Allow Setup over the Internet using Bonjour: Unchecked
Airport Tab > Wireless:
Wireless Mode: Extend a wireless network
Allow wireless clients: checked
Airport Tab > Access Control:
MAC Address Access Control: Not Enabled
Internet Tab > Internet Connection:
Connect using: Greyed-out, not selectable
Connection sharing: Greyed-out, not selectable
Internet Tab > TCP/IP:
Configure IPv4: Using DHCP
Shows IP Address
Internet Tab > Advanced
Didn't touch anything here, so all at defaults
SETUP/GOALS:
With Airport Extreme (Base Station) as the starting point, have the two Airport Express units with the strongest, fastest signal possible, provide Internet access (and file sharing, iTunes speakers capability) to three Macs (one older iMac, one older PowerBook and my new MacBookPro). Again, I believe my new MacBook Pro is the only one with 802.11n support, so I don't expect the other Macs to take advantage of the speed boost offered by the three new 802.11n devices.
+Any and all help with this will be greatly appreciated. Thanks!+

{quote}With the AirPort Extreme, in the AirPort panel, Wireless tab, click on the button for "Wireless Network Options", check the box for "5 GHz Network Name", and enter a different network name. (That can be trivially different, such as the name of the main network suffixed with an underscore and the digit 5.) Once configured that way, connect your "N" gear to each network in turn to see if one is any better than the other. (If you're wondering what effect this would have, it allows segregating your "N" gear from the older gear to prevent the older gear from slowing down your network. However, distance and interference from things like walls may negate any advantage.){quote}
William: I was gone most of yesterday, but had a chance to implement your recommendations today. I added the 5 GHz network as you suggested, but in order to connect to that at all with my 802.n11 MacBokk Pro, I need to be within a few feet of the AE (base station). If I try to access that network even from the next room (well within reach of both the AE and the livingroom AX, I get one bar and "failure to connect" messages just trying to logon to that network.
However, I did some experimenting that (as of right now, anyway) resulted in much faster network access, not only from my MacBook, but also from the older iMac which is the furthest Mac from the AE. According to my wife, that iMac is "loading web pages faster than I've ever seen them!"
Here's what I did:
1. Moved all three units to places where it seemed they would have the least amount of interference with the clearest path from unit to unit, also raising the height of both AXs from about 2-3 feet from the floor to about 5-6 feet from the floor.
2. Changed one setting on the AE (base station): Wireless Tab > Wireless Network Options > Multicast Rate ---> Changed this from Low to High.
I have a feeling the location shifts made the real difference, but I will try changing the multicast rate back to "Low" just to see what happens.
Paul

How to get 802.11n speed for Apple TV?

I installed my first Apple TV yesterday. Great stuff!
My iTunes movie library is on a Core 2 Duo MacBook Pro. I have not yet used the AirPort Extreme 802.11n Enabler on this MacBook, since I just found out it exists. If I use it, can I utilize 802.11n sync speeds with the Apple TV? How?
My AirPort network uses only an "old" 802.11g AirPort Extreme base station, not the "new" AirPort Extreme base station with 802.11n.
I have three 802.11g AirPort Express base stations on my network, mainly for using AirTunes.
My iMac connects to my wireless network using 802.11g, and I don't think the 802.11n Enabler works with it.
My cable modem current connects to my Airport Extreme (802.11g) base station via Ethernet.
I understand I can get a new AirPort Extreme 802.11n base station to replace the 802.11g one, and that would let me use the higher 802.11n speed from the MacBook to the Apple TV. It would also allow (unless I misunderstand) all my 802.11g devices to access the network at the lower speeds they are capable of. Correct?
I also understand there is something called a "dual band network" that involves using both base station types in one large network, but I don't know what the advantage of doing that would be, compared with just replacing the old base station. Can someone fill me in on that?
And, is there any way to get 802.11n speeds from the MacBook Pro to the Apple TV without getting an 802.11n base station?
Thanks in advance.

If I use it, can I utilize 802.11n sync speeds with the Apple TV? How?
And, is there any way to get 802.11n speeds from the MacBook Pro to the Apple TV without getting an 802.11n base station?
No. Unless you set up an adhoc network between your Mac and the Apple TV.
I understand I can get a new AirPort Extreme 802.11n base > station to replace the 802.11g one, and that would let me > use the higher 802.11n speed from the MacBook to the Apple > TV.
Yes, it would.
It would also allow (unless I misunderstand) all my 802.11g devices to access the network at the lower speeds they are capable of. Correct?
If you set things up this way, then I believe you wont be able to use wideband mode on the AEBSn. Your AEBSn will be opperating in mixed mode and its 802.11n performance will be degraded. The best set up would be to keep your old router to service the G only devices, and have your new AEBSn service the N capable devices. This would allow you to take full advantage of the performance increase provided by 802.11n capable devices.
Message was edited by: ctomer

ASK THE EXPERTS - Update on 802.11n with Fred Niehaus

Welcome to the Cisco Support Community Ask the Expert conversation. This is an opportunity to get an update on 802.11n with Cisco expert Fred Niehaus. Fred is a Technical Marketing Engineer for the Wireless Networking Business Unit at Cisco, where he is responsible for developing and marketing enterprise wireless solutions using Cisco Aironet and Airespace wireless LAN products. In addition to his participation in major deployments, Fred has served as technical editor for several Cisco Press books including the "Cisco 802.11 Wireless Networking Reference Guide" and "The Business Case for Enterprise-Class Wireless LANs." Prior to joining Cisco with the acquisition of Aironet, Fred was a support engineer for Telxon Corporation, supporting some of the very first wireless implementations for major corporate customers. Fred has been in the data communications and networking industry for more than 20 years and holds a Radio Amateur (Ham) License "N8CPI."
Remember to use the rating system to let Fred know if you have received an adequate response.
Fred might not be able to answer each question due to the volume expected during this event. Remember that you can continue the conversation on the Other Mobility Subjects discussion forum shortly after the event. This event lasts through March 25, 2011. Visit this forum often to view responses to your questions and the questions of other community members.

So there are two parts of this question, the latter part I cannot address as it is a future question. Cisco does not comment on products that have not been released or on the strategy of next generation products.
That said, Cisco was first to market with an 802.11n Access Point and well (we didn't all go on vacation after we did that)
So let's talk a little about spatial streams in general and how it relates to what customers are doing today.
The Cisco 1040, 1140, 1250, 1260 and 3500 Series Access Points are all two spatial streams (2SS).
As of the time of this writing, a critical mass of 3SS and 4SS compatible clients have yet to be deployed, and the vast majority of WiFi clients that will be deployed over the next 18 months will be 1SS and 2SS clients.
The higher SS clients are likely only show up in some higher end notebooks -- Why? well it is a given that smartphones and tablets are likely to continue to be 1SS and in some rare cases 2SS.
This is because additional radios used in this technology consume battery life, add to the physical size of the device and increase the cost. Also many devices leverage the same single antenna for cellular as well as WiFi. Therefore, it is my opinion that 3SS Access Points provide little if any performance benefit for smartphones or tablets in the enterprise today, and any real throughput gain is likely to occur with high end notebooks in close proximity to the Access Point and those are rolling out very slowly and we are monitoring this.
Now we get to my favorite part of this.. I get to ask myself a question and then answer it..
So Fred are you saying that there is no value in 3SS and 4SS?
Of course not, 3SS performs similar to 2SS beyond a short distance, and with any multi-SS product RF interference must be addressed to capture the performance benefits of higher SS Access Points. Actual throughput in any WiFi environment is highly dependent on the presence of interferers and obstacles.
Without the ability to mitigate the impact of interference, 3SS solutions will "downshift" to 2SS of 1SS and lose all the performance benefits anyway IMHO.
I don't want to sound like a commercial, but you really do need Cisco cleanair technology in the AP and Cisco innovations deliver more and will go beyond the simple 3SS aspects of the 802.11n standard.
IMHO it's more about CleanAir, good RF system design, and what we put into the AP with regard to performance "in the environment" and not what is on some spec sheet today.
For more on Cisco CleanAir see the following URL http://www.cisco.com/en/US/netsol/ns1070/index.html
Fred

How can I get my AE to work in 802.11n mode with my dlink router?

Hi all,
I have a dlink 655 wireless n router that I use for my network and a recent AE with 802.11n capability that I use to connect iTunes to my home stereo.
I have a mix of computers at home and only my imac has 802.11n capability. I work alone in the day so to speed things up, I change the wireless setting on my dlink router to 802.11n only mode. Normally, it is in a mixed mode of 802.11g/n for the other non n computers on the network.
My imac connects fine when in 802.11n only mode but the AE looses connection. As it is 802.11n capable, I was wondering why this happens?
I tried checking Airport Utility for a 802.11n only mode or something similar, but didn't find anything. Will the AE only work in 802.11n mode when on the 5ghz frequency? if so, that would explain why it doesn't connect with the dlink 2.4ghz router in n mode.
Any ideas?? Thanks!

Hi. Thanks for the reply. It turns out that the router was not going into n mode because of the security I set on it. I finally figured this out and the AE did connect in n mode after all.
Well at least it's working now but I feel a little bad for posting when it was my fault!!
Cheers!

My macbook pro I7 does not have 802.11n compability

Hello you all.
My macbok pro I7 was bought since 8 months ago and is this:
Macbook Pro Information
Nombre del modelo: MacBook Pro
Identificador del modelo: MacBookPro9,2
Nombre del procesador: Intel Core i7
Velocidad del procesador: 2,9 GHz
Cantidad de procesadores: 1
Cantidad total de núcleos: 2
Caché de nivel 2 (por núcleo): 256 KB
Caché de nivel 3: 4 MB
Memoria: 8 GB
the problems is that my WIFI network adapter only support 802.11a/b/g. and doesn't support 802.11 /n or /ac
Do you know if this problems could solve updating firmware or my hardware wifi adapter doesn't support 802.11n or /ac
Thank you all
Best regards
MacBook Pro WIFI Adapter Information
Interfaces:
en1:
Tipo de tarjeta: AirPort Extreme (0x14E4, 0xF5)
Versión del firmware: Broadcom BCM43xx 1.0 (5.106.98.100.22)
Dirección MAC: a8:bb:cf:03:d2:10
Configuración regional: FCC
Código del país: LA
Modos PHY compatibles: 802.11 a/b/g
Canales admitidos: 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 36, 40, 44, 48, 52, 56, 60, 64, 100, 104, 108, 112, 116, 120, 124, 128, 132, 136, 140
Wake on Wireless: Compatible
AirDrop: Compatible
Estado: No asociado
No
Estado: N

Thank Linc
ufff i feel walking to a dark room...
What do you suggest to start looking for....
1.fix my router if is possible in admin setup or
2. Find a new router with this feature
Thanks
Update: Dear Linc, Look this. I am at work now, and i try to connect to the guest WAP after i posted this message.
Surprise, these change de LAOS country code to US and now 802.11/n, but still left to /ac This is the reason for i bought a 868L dlink router to use 5ghz.
en1:
Tipo de tarjeta:      AirPort Extreme (0x14E4, 0xF5)
Versión del firmware:           Broadcom BCM43xx 1.0 (5.106.98.100.22)
Dirección MAC:    a8:bb:cf:03:d2:10
Configuración regional:         FCC
Código del país:    US
Modos PHY compatibles:     802.11 a/b/g/n
Canales admitidos:                1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 36, 40, 44, 48, 52, 56, 60, 64, 100, 104, 108, 112, 116, 120, 124, 128, 132, 136, 140, 149, 153, 157, 161, 165
Wake on Wireless:                Compatible
AirDrop:               Compatible
Estado: Conectado
Información de la red actual:
I re-ask the question.
What do you suggest to fix my ROUTER.
1.fix my router if is possible in admin setup or
2. Find a new router with this feature
here some hints of my configuration:
1. My ISP provider, provides a optics fiber router brand ZYXEL model ZNID24-xx and my dlink router DIR 868L is behind connected to LAN port1.
2. DIR 868L 2,4 ghz wireless network setup in mixed /g /n Channel 1. (I tried every channel in only /n )
3. Update the last firmware for DIR868L
Thank you!
best regards

MBP 2010 won't connect to DLINK 802.11n

When I go to System Information and Wi-Fi it says PHY Mode: 802.11g.
When I get into my router set up page it set to mixed 802.11n/b/g
So ya the internet works with G and I dont understand why it wont connect to N and I don't know how to make it do that.
Any suggestions?
I'm running Lion and everything on my MBP is updated.

Lion Mac OS X Communities
MacBook Pro

MBP 2010 Lion won't connect to DLINK 802.11N

When I go to System Information and Wi-Fi it says PHY Mode: 802.11g.
When I get into my router set up page it set to mixed 802.11n/b/g
So ya the internet works with G and I dont understand why it wont connect to N and I don't know how to make it do that.
Any suggestions?
I'm running Lion and everything on my MBP is updated.

Lion Mac OS X Communities
MacBook Pro

Can I force 802.11g instead of 802.11n?

A coffeehouse I frequent seems to have buggy 802.11n wifi -- I can't maintain a connection with my MacBook Pro, while my friend's iBook G4 has no problems with its 802.11g card.
So...
Is there a way to force my MBP to connect using G instead of N? This is a case where I can't reconfigure the router itself, so it's either force a G connection or frequent a different coffeehouse.

I bought Linksys wireless vs. paying for Apple's and they have a mode to select, e.g. lock out other protocols. You'd think Apple would too.
Here's a cheap and easy way as well - use a Linksys WRT54G router as a WAP set in G only. Connect it to your router with a cable and set it in a location ideally even closer to where you get the dropouts and it will act as a WAP vs. a router. Cheaper than actually buying Linksys' own WAP.
Simple to do - connect via ordinary cable to a port on the Linksys NOT the WAN port, set a static IP on it outside the range of the DHCP addresses assigned by your router and disable DHCP on the Linksys. It then becomes a WAP. Great way to extend networks and in your case to have a WAP forced to 802.11G. There is a setting for that - from B/G mixed to G only. $50 and a few minutes to set up. Yuo set up a separate SSID and password for WPA-2 and select it with your MBP.

Upgrading T61 NIC -- 4956agn (n-disabled) -- to 802.11n

I have a T61 7659-12U. According to the Lenovo specs and what I see using Windows Device Manager, this -12U version of model 7659 comes with the Intel 4965agn wireless card (n-disabled). I am therefore only able to use 802.11g wireless connections, not 802.11n.
The basic specs for the 7659 model indicate that it supports several types 802.11n wireless cards; however, I see nothing in Lenovo specs that show whether this capability applies to all versions of the 7659, or only some versions.
Is it possible for me to just buy and install a Lenovo-approved n-level card in my -12U system -- does my system have all the motherboard connections, antenna capabilities, etc. to support an internal 802.11n NIC, or do I need to use an external PCMCIA wireless card to get 802.11n capability.??
Message Edited by nlitell on 03-06-2009 11:39 PM
T410 2522-K4U QuadCore Intel i7 Processor 8GB RAM 320GB SATA HDD
64-bit Windows7 Pro, with Windows Virtual XP (as included under W7 license)
D-Link 655 Wireless Network WEP encryption MAC Filtering
-- Both 802.11b and g adapters on various network components
Solved!
Go to Solution.

I finally got a Lenovo trouble ticket opened on this, and the answer was yes, I could upgrade the NIC to an N-level card. The antenna and software already support n-level operation.
Apparently Intel makes just one basic 4956 chip design, and then cripples the n-level operation on some of them for installation in lower-cost versions of specific computers. The basic T61 7659 box supports a variety of NICs, and the configuration version (12U in my case) just indicates which mix of options (disk size, NIC, etc.) is installed in that particular computer. The 12U just contains a cheaper set of options than other T61s.
T410 2522-K4U QuadCore Intel i7 Processor 8GB RAM 320GB SATA HDD
64-bit Windows7 Pro, with Windows Virtual XP (as included under W7 license)
D-Link 655 Wireless Network WEP encryption MAC Filtering
-- Both 802.11b and g adapters on various network components

802.11n implementation- First steps

We have around 35 access pints (1230,1240,1260) and 500 clients (RDTs and printers ) in our warehouse running on 802.11b/g, some of the clients support 802.11n and some of them don't. We are planning to upgrade all our clients by the end of the year so that they all can support 802.11n.
We are getting reports about intermittent wireless connectivity issues from our warehouse and some of APs have peak client count of 55. We can't add any more APs in those areas because of the interference(only 3 non over lapping channels in 2.4ghz), so we decided to add new APs with 802.11n antennas (11n antennas only) in those areas so that all the clients that support 802.11n can connect to the new APs.
Do you see any caveats in that design. AES,TEKIP and WMM is already enabled on all our WLANs, is there anything else I have to do other than enabling (wireless--802.11a/n--High Throughput-11n ) mode on the controller and configuring the antennas on the APs? And also does enabling 802.11n (5Ghz) in greenfield mode on an AP has any affect on the AP that only has 802.11b/g antennas?
Below is a logical diagram, thanks for the help
Siddhartha

Leo,
Below is the diagram, the distance from the ground to the AP is 9 feet and all the AP s have two external patch anenna (AIR-ANT2460P-R) facing the ground.
Siddhartha

WRT330N and DELL 1505 Draft 802.11n WLAN Mini-Card Rev 2.0

Well it was time to upgrade the house with two new DELL Inspiron 530s.
Each with their own "DELL 1505 Draft 802.11n WLAN Mini-Card Rev 2.0"
Now the (problem) we are having is we are lucky to get 13.0 Mbps & that's if we stay online. Our World of Warcraft gets booted a lot. Which makes gaming hard when I purchased the WRT330N for gaming.
We have the latest drivers for the Wirelss adapters, Firmware is up to date.
Setup is as follows.
Wireless Setting:
Network: Wirelss-N Mixed
Wireless Name (SSID): My own thing there
Radio Band: Wide - 40 MHz channel
Wide Channel: 9
Standard Channel: 2.462 GHz - cH 11
SSID Broadcast: Disabled
Advanced Wireless Setting:
Trasmission Rate: Auto
CTS Protection Mode: Disabled
Beacon Period: 50
DTIM Interval: 3
Fragmentation Threshold: 2346
RTS Threshhold: 2347
Network Density: Low
Wireless Security: Disabled. We currently use Wireless MAC Address Filtering.
Any suggestions?

I am having the same issues. I have the same router but a different laptop. Mine is a Inspiron 1545 with an Intel 5100 AGN card. So the solution is to ditch the Linksys router and get a D-Link? what say you Linksys

802.11n greenfield in a mixed environment

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