Aironet 1252 / 802.11n / Outdoor Use over 2.7 km (1.7 miles)

Hi There,
We are planning to use two Aironet's 1252 over an 2.7 km point to point link.
One of the options we have it to install three HyperLink Parabolig Grid 5.8 MHz 27 dBi antennas in parallel for every 1252.
I have some concerns because those antennas are not supported by Cisco. In fact, the most gain of Cisco supported antennas is 10 dBi Yagui for 2.4 GHz and 6 dB Omni for 5.8 GHz.
The question is if the 3x 27 dBi antenna array on each side will work without self interferences and what would be the required separation of antennas to get 300 Mbps over the link.
Has anyone tried something like this with the 1252's?
Thanks in advance for any information.
BR,
Igor Sotelo.

Hi Steve,
I have seen the Q&A section for the Aironet 1250:
http://www.cisco.com/en/US/prod/collateral/wireless/ps5678/ps6973/ps8382/prod_qas0900aecd806b7c82_ps6973_Products_Q_and_A_Item.html
states that both root and non-root bridge modes are supported.
About that, may I ask if that means that the bridging can work over 802.11n, but is not supported for regulatory reasons. Or the bridging basically only functions in 802.11 a and g modes.
Thanks for the information.
BR,
Igor Sotelo.

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I have to propose to a client a 802.11n outdoor Acess point with external antenna, tha gain must be >8 dbi.
DO NOT, under any circumstances, use 1260 or 3500e if you plan to use antennas > 6 dBi. These two models DO NOT SUPPORT antenna gain higher than 6 dBi. The only two 802.11n-capable WAP that can support high-gain antenna of > 6 dBi are the 1250 and the 3500p.
Antenna Product Portfolio for Cisco Aironet 802.11n Access Points
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The 3500p was released around mid-2011 because people were howling/screaming about the lack of high-gain antenna support, thus the 3500p was developed alongside the AIR-ANT25137NP-R.
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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.
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+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.
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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.
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Fire the puppy up and for an overnight backup device, it's perfect. I couldn't use it for encoding video but for going to bed and letting my computer backup cheaply and safely, I am delighted!
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After setting up my brand new Airport Express 802.11n and accidentally using it to connect my iMac to the network...my iMac no longer connects through Ethernet? Any ideas...I have tried everything without success!!

I have been using Apple technology for about 10 years starting with 1st generation iPods and our house now includes a 5 year old iMac, all versions of iPods and touches, Apple TVs (both generations) and most recently an iPad 2. I have always told family and friends that Apple technology just works. Unfortunately that stopped today. I bought a new Airport Express 802.11n to use for AirTunes around my new pool. I set it up from my iMac and accidentally used it to connect my iMac to the network for a short time. Now I can no longer connect the iMac to the network using a hard wired Ethernet cable. I have tried resetting everything possible, from hubs to routers to the Mac itself and it just will not connect to the network through Ethernet any longer. I am now a very frustrated Apple user especially when the support site says I can't use the fast path support because my product was manufactured 5 years ago...I just bought it at BestBuy yesterday. All other computers and itechnology in the house are connecting via wifi and Ethernet without any issue except from my new iMac boat anchor. Anybody who can help me??? Thanks

John, thanks for the email so quickly.
I too hope I haven't tried "everything" either but I am reasonably technical. I had done what you suggested to do before but I did both again.
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Hi, I'm an old Navy retired electronics technician and have been working on Macs since 1986 and am in the same boat as you. I have a 15" MBP that I have already taken apart once to install a larger Hard Drive and Williams procedure doesn't look all that more difficult. I have the card on order from Powermax and I expect to install it by the end of this week. If it works out for me and testing shows it works consistantly and if you are willing to trust me with your "baby" for the time it takes to install it and ship it back I would be glad to do the same for your machine for a small fee. If you are interested, contact me at my email [email protected]
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I configured the security settings with on the Airport Extreme to Timed Access. I set the default setting is to No Access.
Three computers are set with "Everyday, Between 8:00am and 11:00pm"; however, when it's 11:00pm, nothing happens. The three computers continue to have access.
I know the MAC addresses I entered are correct. Does anyone know why the Timed Access is not working?

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Aironet 1252 bridge and 802.11n

Hi,
I have two Cisco Aironet 1252 that I want to configure as a point-2-point bridge. Now I want to know if this configuration supports the 802.11n protocol.
Regards,
Screech

Scott,
I found the following statemen in the release note of IOS 12.4 (25d) (http://www.cisco.com/en/US/docs/wireless/access_point/ios/release/notes/12_4_25d._JArn.html#wp291685)
802.11n HT Rates Apply Only to No Encryption or WPA2/AES Encryption
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Given this statement how do I configure AES encryption on the aironets 1252 that are configured in bridge mode as I do not see this option. If possible please provide steps using the web interface.
Regards,
Screech

Aironet Autonomous 1252 CLI command 802.11n disable

hi,
I am using Aironet Autonomous 1252 AP. The version used is:
Cisco IOS Software, C1260 Software (AP3G1-K9W7-M), Version 12.4(25d)JA1, RELEASE SOFTWARE (fc1)
I want to disable 802.11n on 2.4GHz interface. Please tell the CLI command to do this.
Thanks in advance.
uv.

Why you want to disable 802.11n data rates ?
There are few other ways as well. For 802.11n you should have following
1. WMM enable
2. either Open Authentication or WPA2/AES
So if you are not using 1 & 2 both, you won't get 802.11n data rates. Refer this
https://supportforums.cisco.com/discussion/12078656/aironet-ap-1252-how-use-80211g-only
HTH
Rasika
**** Pls rate all useful responses ****

Have a 802.11n time capsule, the range of the wireless network has shrunk down to nothing over last few days. Used to be able to use wireless network anywhere in house, but now can only use in my office. Will not connect to iphones, ipad, itouch, or noteb

Have a 802.11n time capsule, the range of the wireless network has shrunk down to nothing over last few days. Used to be able to use wireless network anywhere in house, but now can only use in my office. Will not connect to iphones, ipad, itouch, or notebook. Worked fine last week, but over weekend just started having issues.

It is very possible that you may have some form of Wi-Fi interference that has appeared recently that is preventing your Time Capsule (TC) from providing a clean RF signal.
I suggest you perform a simple site survey, using utilities like iStumbler, or AirRadar to determine potential areas of interference, and then, try to either eliminate or significantly reduce them where possible. Look for other Wi-Fis that may be operating nearby. Note those with the strongest signals and which channels they are operating on ... then change the channel used by the TC to be at least 3-5 channels away.

Packet loss / pausing when using 802.11N (Intel 6300)

Hi,
Previously, I had posted a thread involving the Intel 6250, and lack of detection of N WiFi on that card. Some time later, I bit the bullet and got an Intel 6300 card off eBay. After receiving it today, I popped it into my Thinkpad X220, and it worked.... sort of. I can definitely see wireless N support, and can associate with my 2.4 GHz mixed-mode B/G/N network at 130 Mbps, and my 5 GHz N-only router at around 243 - 270 Mbps. However, right off the bat, it seems the number of "Tx Excessive Retries" in iwconfig climb up to several thousand within ~ 15 - 20 minutes of connecting. Also right off the bat, pings are rather inconsistent (typically at least 2 ms greater than when the card is forced to work in G-only mode, and with pauses and spikes up to 800 - 2000 ms, and packet loss from 5 - 10%)
From what I have gathered so far, there has been a bug in the iwlwifi kernel tree that affects N wireless users, and this bug has been around since around 2010 or even earlier. However, I was under the impression that some sort of fix has been merged into the mainline Kernel at this point (I'm on 3.5.3-1-ARCH BTW), and my symptoms are somewhat less aggressive than the ones others described (basic web browsing works reasonably well, though there is often noticeable lag in the response times, but anything latency/packet loss-sensitive will suffer in a major way.) Has anyone managed to get wireless N to actually work reasonably well on Arch (or for that matter, ANY linux distro)? As I understand it, the matter is one of relation to the kernel module itself, so distro-distro variations of userspace apps shouldn't be as much a factor anyway. I am using WICD for my network manager, and am happy to say that it does its job admirably well (assuming the card is set to G-only mode, but the connection itself is actually maintained quite stably even in N mode.)
While I understand that the 11n_disable=1 "fix" allows most people to get on with their lives, I am rather alarmed that this is being considered a long-term solution. Many laptop owners (ThinkPad owners like myself for example) are essentially locked into Intel WiFi cards, unless we are willing to take an expensive risk and flash our BIOS to one that that doesn't have a "whitelist" of approved cards (something that can void the warranty or worse, brick a laptop.) All the while, Intel is still claiming Linux support for a card whose major capabilities are essentially neutered purely based on the OS a user chooses to run (yes, I do consider N to be a major capability, considering 300 Mbps N WiFi is basically old news, with many manufacturers coming out with full 450 Mbps routers. Also, chipsets like Atheros seem to have no problems with offering both performance and stability under Linux... my desktop rig using an Atheros card manages perfectly fine on a full-rate wireless-N network with essentially no packet loss or latency spikes.)
Below is some information that might be useful:
iwconfig (802.11g, ~ 1 hour after connection and running a few speedtests, browsing, ping testing):
wlan0 IEEE 802.11abg ESSID:"dd-wrt"
Mode:Managed Frequency:2.437 GHz Access Point: XXXXXX
Bit Rate=54 Mb/s Tx-Power=15 dBm
Retry long limit:7 RTS thr:off Fragment thr:off
Power Management:off
Link Quality=69/70 Signal level=-41 dBm
Rx invalid nwid:0 Rx invalid crypt:0 Rx invalid frag:0
Tx excessive retries:0 Invalid misc:359 Missed beacon:0
iwconfig (802.11n, 5GHz after ~10 minutes browsing/ping testing):
wlan0 IEEE 802.11abgn ESSID:"net2"
Mode:Managed Frequency:5.745 GHz Access Point: XXXXXX
Bit Rate=243 Mb/s Tx-Power=15 dBm
Retry long limit:7 RTS thr:off Fragment thr:off
Power Management:off
Link Quality=55/70 Signal level=-55 dBm
Rx invalid nwid:0 Rx invalid crypt:0 Rx invalid frag:0
Tx excessive retries:860 Invalid misc:50 Missed beacon:0
iwconfig (802.11n, 2.4 GHz after connecting and running a speedtest):
wlan0 IEEE 802.11abgn ESSID:"dd-wrt"
Mode:Managed Frequency:2.437 GHz Access Point: XXXXXX
Bit Rate=117 Mb/s Tx-Power=15 dBm
Retry long limit:7 RTS thr:off Fragment thr:off
Power Management:off
Link Quality=66/70 Signal level=-44 dBm
Rx invalid nwid:0 Rx invalid crypt:0 Rx invalid frag:0
Tx excessive retries:974 Invalid misc:59 Missed beacon:0
dmesg | grep iwl :
[12011.488089] iwlwifi: Intel(R) Wireless WiFi Link AGN driver for Linux, in-tree:
[12011.488092] iwlwifi: Copyright(c) 2003-2012 Intel Corporation
[12011.488269] iwlwifi 0000:03:00.0: pci_resource_len = 0x00002000
[12011.488271] iwlwifi 0000:03:00.0: pci_resource_base = ffffc900050f8000
[12011.488273] iwlwifi 0000:03:00.0: HW Revision ID = 0x35
[12011.488585] iwlwifi 0000:03:00.0: irq 50 for MSI/MSI-X
[12011.491862] iwlwifi 0000:03:00.0: loaded firmware version 9.221.4.1 build 25532
[12011.492112] iwlwifi 0000:03:00.0: CONFIG_IWLWIFI_DEBUG disabled
[12011.492114] iwlwifi 0000:03:00.0: CONFIG_IWLWIFI_DEBUGFS disabled
[12011.492116] iwlwifi 0000:03:00.0: CONFIG_IWLWIFI_DEVICE_TRACING enabled
[12011.492117] iwlwifi 0000:03:00.0: CONFIG_IWLWIFI_DEVICE_TESTMODE enabled
[12011.492119] iwlwifi 0000:03:00.0: CONFIG_IWLWIFI_P2P disabled
[12011.492121] iwlwifi 0000:03:00.0: Detected Intel(R) Centrino(R) Ultimate-N 6300 AGN, REV=0x74
[12011.492206] iwlwifi 0000:03:00.0: L1 Enabled; Disabling L0S
[12011.502925] iwlwifi 0000:03:00.0: device EEPROM VER=0x436, CALIB=0x6
[12011.502928] iwlwifi 0000:03:00.0: Device SKU: 0x1F0
[12011.502930] iwlwifi 0000:03:00.0: Valid Tx ant: 0x7, Valid Rx ant: 0x7
[12011.502946] iwlwifi 0000:03:00.0: Tunable channels: 13 802.11bg, 24 802.11a channels
[12011.503105] ieee80211 phy8: Selected rate control algorithm 'iwl-agn-rs'
[12011.503456] iwlwifi 0000:03:00.0: L1 Enabled; Disabling L0S
[12011.503661] iwlwifi 0000:03:00.0: Radio type=0x0-0x3-0x1
[12011.745631] iwlwifi 0000:03:00.0: L1 Enabled; Disabling L0S
[12011.745868] iwlwifi 0000:03:00.0: Radio type=0x0-0x3-0x1
[12073.651471] iwlwifi: Intel(R) Wireless WiFi Link AGN driver for Linux, in-tree:
[12073.651474] iwlwifi: Copyright(c) 2003-2012 Intel Corporation
[12073.651660] iwlwifi 0000:03:00.0: pci_resource_len = 0x00002000
[12073.651661] iwlwifi 0000:03:00.0: pci_resource_base = ffffc900050b8000
[12073.651663] iwlwifi 0000:03:00.0: HW Revision ID = 0x35
[12073.652241] iwlwifi 0000:03:00.0: irq 50 for MSI/MSI-X
[12073.655662] iwlwifi 0000:03:00.0: loaded firmware version 9.221.4.1 build 25532
[12073.655887] iwlwifi 0000:03:00.0: CONFIG_IWLWIFI_DEBUG disabled
[12073.655890] iwlwifi 0000:03:00.0: CONFIG_IWLWIFI_DEBUGFS disabled
[12073.655891] iwlwifi 0000:03:00.0: CONFIG_IWLWIFI_DEVICE_TRACING enabled
[12073.655891] iwlwifi 0000:03:00.0: CONFIG_IWLWIFI_DEVICE_TESTMODE enabled
[12073.655892] iwlwifi 0000:03:00.0: CONFIG_IWLWIFI_P2P disabled
[12073.655894] iwlwifi 0000:03:00.0: Detected Intel(R) Centrino(R) Ultimate-N 6300 AGN, REV=0x74
[12073.655975] iwlwifi 0000:03:00.0: L1 Enabled; Disabling L0S
[12073.666587] iwlwifi 0000:03:00.0: device EEPROM VER=0x436, CALIB=0x6
[12073.666593] iwlwifi 0000:03:00.0: Device SKU: 0x1F0
[12073.666595] iwlwifi 0000:03:00.0: Valid Tx ant: 0x7, Valid Rx ant: 0x7
[12073.666618] iwlwifi 0000:03:00.0: Tunable channels: 13 802.11bg, 24 802.11a channels
[12073.667056] ieee80211 phy9: Selected rate control algorithm 'iwl-agn-rs'
[12073.667456] iwlwifi 0000:03:00.0: L1 Enabled; Disabling L0S
[12073.667659] iwlwifi 0000:03:00.0: Radio type=0x0-0x3-0x1
[12073.908411] iwlwifi 0000:03:00.0: L1 Enabled; Disabling L0S
[12073.908632] iwlwifi 0000:03:00.0: Radio type=0x0-0x3-0x1
[12087.261869] iwlwifi 0000:03:00.0: L1 Enabled; Disabling L0S
[12087.262090] iwlwifi 0000:03:00.0: Radio type=0x0-0x3-0x1
[12087.487757] iwlwifi 0000:03:00.0: L1 Enabled; Disabling L0S
[12087.488010] iwlwifi 0000:03:00.0: Radio type=0x0-0x3-0x1
[12087.699574] iwlwifi 0000:03:00.0: L1 Enabled; Disabling L0S
[12087.699781] iwlwifi 0000:03:00.0: Radio type=0x0-0x3-0x1
[12087.837322] iwlwifi 0000:03:00.0: L1 Enabled; Disabling L0S
[12087.837526] iwlwifi 0000:03:00.0: Radio type=0x0-0x3-0x1
[12097.329577] iwlwifi 0000:03:00.0: L1 Enabled; Disabling L0S
[12097.329832] iwlwifi 0000:03:00.0: Radio type=0x0-0x3-0x1
[12097.797748] iwlwifi 0000:03:00.0: L1 Enabled; Disabling L0S
[12097.797970] iwlwifi 0000:03:00.0: Radio type=0x0-0x3-0x1
[12098.016220] iwlwifi 0000:03:00.0: L1 Enabled; Disabling L0S
[12098.016458] iwlwifi 0000:03:00.0: Radio type=0x0-0x3-0x1
[12100.458762] iwlwifi 0000:03:00.0: L1 Enabled; Disabling L0S
[12100.459006] iwlwifi 0000:03:00.0: Radio type=0x0-0x3-0x1
[12100.608769] iwlwifi 0000:03:00.0: L1 Enabled; Disabling L0S
[12100.609021] iwlwifi 0000:03:00.0: Radio type=0x0-0x3-0x1
[12100.764093] iwlwifi 0000:03:00.0: L1 Enabled; Disabling L0S
[12100.764341] iwlwifi 0000:03:00.0: Radio type=0x0-0x3-0x1
[12100.979029] iwlwifi 0000:03:00.0: L1 Enabled; Disabling L0S
[12100.979228] iwlwifi 0000:03:00.0: Radio type=0x0-0x3-0x1
[12101.159987] iwlwifi 0000:03:00.0: L1 Enabled; Disabling L0S
[12101.160208] iwlwifi 0000:03:00.0: Radio type=0x0-0x3-0x1
lshw | less :
*-network
description: Wireless interface
product: Centrino Ultimate-N 6300
vendor: Intel Corporation
physical id: 0
bus info: pci@0000:03:00.0
logical name: wlan0
version: 35
serial: 00:24:d7:be:9e:74
width: 64 bits
clock: 33MHz
capabilities: pm msi pciexpress bus_master cap_list ethernet phy
sical wireless
configuration: broadcast=yes driver=iwlwifi driverversion=3.5.3-
1-ARCH firmware=9.221.4.1 build 25532 ip=192.168.1.145 latency=0 link=yes multic
ast=yes wireless=IEEE 802.11abgn
resources: irq:50 memory:f2500000-f2501fff
Thanks,
- A.G.

I have an ASUS UX32VD-DB71 which has the Intel Centrino 6235 wifi card. I've been having this laptop for more than 6 months and I've tried different solutions to fix the issue with Wireless-N but none of them were stable other than disabling N completely using 11n_disable=1
I've tried different kernels all the way from 3.2 to the latest 3.7 series of kernels (both in the openSUSE tree as well as mainline) with no luck whasoever. I also tried installing the compat-drivers from 2013-01-23-1-u version onto my 3.6 kernel which provided the same results too. I see packet loss with N and the G speeds are just too slow. I have a workstation in my network and I can only transfer effectively at 1.5 MB /s max over G whereas an old laptop from 2007 which has an 1x1 MIMO antenna (again Intel though) can connect at 144 Mbps to my router and transfer files at least 3-4 times faster (if not more).
It is totally unacceptable for Intel to not just fix this issue for Linux.
Last edited by Tuxdude (2013-02-17 01:38:59)

Printing to Ethernet Printers Using Airport Extreme Base Station 802.11n

I don't want anything extraordinary. I think what I have to set up is pretty simple.
I have a PowerMac G5 tower and an Airport Network with an older 802.11g AExBS connected to my cable modem. I just acquired an AExBS 802.11n. While I'm sure that people would tell me to ditch the older one an just use the newer one, that is not today's task.
All I would like to do is to use the AExBS for my 3 Ethernet printers. The printers are:
Brother HL-2070N
Brother MFC-420CN
HP Color Laserjet CP2025dn
Each printer is plugged into each of the 3 ethernet ports and not the WAN port. I didn't have any problems using my Netgear WGT624 wireless router, so I don't know why the AExBS is giving me such a headache. Is there something simply I'm missing in the instructions? Can anybody tell me if I'm missing something here?

Now I have managed to delete all but my directly connected USB printers in the Print & Fax area of my System Preferences. What gives?
I thought this was going to be straight forward. They don't even address hooking up ethernet printers in the manual. I've looked over the web and see other people having the same problem, but their original setup appears to be different and/or more difficult.

Unable to Connect Using New AirPort Express 802.11n

My mom purchased an AirPort Express 802.11n wireless router (AX) and I, as the designated "technology guru", was tasked with setting it up. Unfortunately, I am having problems out of the box.
When I connect it to the wall, it is found by AirPort Utility, but when I try to set it up, it is unable to connect to the wireless network. ("An error occurred joining the selected wireless network." "An error occurred, close the configuration window and try again.") This is annoying because I have an older AX and it was true to the "it just works" Apple mantra. It is also annoying because the error message has a comma splice.
Feeling pretty proud of my "technology guru" title, I come here to see what I could be doing wrong. I try connecting the computer directly to the router via ethernet cable. With this, I am able to setup my wireless network. I am still not able to connect to it. Additionally, once the AX has been configured, the AirPort Utility can't find it.
I tried updating firmware to 7.5.2. I've tried downgrading to 7.3.2. I've tried hard resets, soft resets. Every tip I could find I have tried. Please help. My self-confidence is wearing out.
Is it time for a call to Apple or a visit to the Apple Store?

Are you trying to configure the Express to "join" the wireless network?
If yes, the message you are receiving is likely an indication that you do not have the correct security settings selected for the Express. Unless the security settings between the wireless router and Express match up exactly, the Express will display the error that "an error occurred, etc".
The easiest way to confirm if you have this problem is temporarily set the main wireless router to "no security" and try to connect the Express that way. If you can connect, then you know that it is a security issue.
Please tell us the exact setting for security that the wireless router there is using and we'll try to give you some more ideas.
The Express will connect. It's just a matter of finding the right settings.
Message was edited by: Bob Timmons

Manual Static LAN IP address for 802.11n Base Station when using PPPoE

We have a network of about 75 machines. We want to replace our main router with the new Airport Extreme 802.11n base station. WAN connection is PPPoE so we'd use the NAT function. All IP addresses of our machines on the LAN are statically assigned.
Problem is our machines are assigned to find the router at a specific address: 192.168.0.254. The default base station IP in that subnet is 192.168.0.1. Is there any way to change the IP of the base station to 192.168.0.254 from the default of 192.168.0.1? We can do it if we have it join our existing LAN in bridge mode, but we want it to provide the main NAT functions AND connect to our ISP's PPPoE server WITHOUT having to change all our LAN devices to find it at 192.168.0.1. Possible?

The HH will only show devices which use DHCP in the list of devices, unless you've set the device to use a static IP in the HH Home Network page. It's a bit of a silly idea and IMO the software on the router is terrible, but you do it like this...
- Set the printer to use DHCP to get an IP address.
- Log in to the HomeHub 5 and browse to the Home Network page (http://192.168.1.254/index.cgi?active_page=9130)
- Find the printer in the list of devices and click on it.
- Click on 'Yes' next to the "Always use this IP address" option.
- Set the IP address on the printer statically and update your devices to use the new IP address of the printer (if it changed from what it was before).
That will ensure that the DHCP server in the HH5 doesn't lease the same IP to another device. This will also allow you to see the printer in the list of devices.

Aironet 1252 / 802.11n / Outdoor Use over 2.7 km (1.7 miles)

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