Aironet 1240 + 12 dbi antenna

Hey all,
I have a Cisco Aironet 1242G and an outdoor omni 12 dbi antenna. I hooked it all up to day (antenna is connected with a 100ft cable). My signal is very disappointing. I have it behind a garage and can only get about maybe 75 foot away and the signal gets very weak.
Is there something that needs to be configured in the aironet? I have enabled external antenna and played with the settings. Is the 12 dbi antenna just too much?

What cable are you using? Usually for that long you would use LMR 400 and or LMR 600 to reduce attenuation. See this online calculator
http://www.timesmicrowave.com/cgi-bin/calculate.pl
Thanks,
Scott
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Does the 1200 aironet come with an antenna?

does the 1200 aironet come with an antenna?

You can indeed. However the keep in my that the antenna needs to have the proper connector RP-TNC.. And also keep in mind the 7 dbi is a stong antenna. At full ap power you will be blasting just over 400mW..
"Satisfaction does not come from knowing the solution, it comes from knowing why." - Rosalind Franklin
‎"I'm in a serious relationship with my Wi-Fi. You could say we have a connection."

Wireless Bridge Aironet 1240

Hi all,
is it possible to create a wireless bridge between 2 AP of different brands?
I need to create a bridge between an Aironet 1240 and a Telecom Italia router (Alice Gate VoIP 2 Plus Wi-Fi), where
the Alice Gate is the AP and the aironet works in the workgroup mode.
At home I tried with the Aironet and a Thomson st585: when aironet tries to connect to the ssid, the thomson ap reloads.
In Aironet logs I find : "Parent lost : too many requests"
What does it mean?

dancampb is right. There isn't a standard for wireless bridging so interoperability between vendors is very low.
I have tried the following 3 tests.
1. Set Cisco Aironet 1242 as the root AP and Cisco Aironet 1231 as the wireless work bridge. No problem with all encryption methods like WEP, WPA WPA2.
2. Set Linksys WRT310N as the root AP and Cisco Aironet 1242 as the wireless work bridge. Tried WPA2, can't associate.
3. Set Belkin54g as the root AP and Cisco Aironet 1231 as the wireless work bridge/repeater. Open method, can't associate.
As far as I know, if you can flash both the AP and the Bridge with the same firmware like DD-WRT, then you have a big chance to successfully associate them.
Hope the above tests help.

Aironet 1260 and external Antenna

I know you can put a minimum of 3 AIR-ANT-2422 antenna on the 1261 AP but my question is, can you mix and match antenna?
Currently there is an AIR-ANT-24120 used on an older 1200 model. Upgrading to a 1261. The 24120 is 12db and 2422 is 2.4db.
Environment is Manufacturing floor with 30' ceilings, worried about coverage. Can the 24120 work on the 1261 or am I stuck with the 2422s?
Thanks

You can't mix-and-match these two. AIR-ANT-24120 is a 12 dBi antenna. The 1260 will not support anything higher than 6 dBi because this model simply doesn't have enough power to do so.
The 1260, 3500e and 3600e doesn't have enough power because in the past people kept complaining that the 1250 needed 20.0w PoE power. Now the the 1250 doesn't have any limitation about the maximum (maybe it does but I haven't seen or heard of it) gain support. So Cisco cranked down the power requirement of the new WAPs and balanced it to the antenna gain.

DBi Antenna Power control

we proposed a wireless network solution to the customer with 4400 Series WLAN Controller for up to 25 Lightweight APs and 1000 Series 802.11a/b/g AP w/Int Ant and RP-TNC, ETSI cnfg with 6 DBi antenna.
Can i control the DBi antenna power by using WLAN Controller ??? Or in any other way..
Please provide me the assistance on above
Regards,
Manoj

During the site survey, we used the 1230 and assigned tx power based on 100mw, 50, 30, 10, 5.. so on.. on the AP. But when we implemented the controller-based, the transmit power were replaced with 'power levels', 1,2,3,4... so on... I read somewhere that 1 is the max and as the level increases, it is 50% less. say, 1=100mw, 2=50 mw, 3=25mw, 4=12.5, 5=6.25 and so on...
the confusion is, some AP's were set to 30mw of tx power during the site survey. Which level should be the euqivalent as tx power level on the wlc-based deployment? is it safe to assign the 30mw site survey data to the #3 tx power level on the controller?
And do you have ideas on the effect of using or assigning the country codes of the controller. If US is used, what is the max power level value, 100mw? And if US is used as country code, can we used any AP on any country domain. I checked out the chart, but it's quite confusing. Hope you can, or anyone can, shed light on this.
Thanks for any ideas.... Argh!

SSID to Radius without WLC (Aironet 1240)

Hi.
I am working on setting up a new WLAN infrastructure. I have set up different SSIDs connected to different VLANs, in the AP.
I also want to use Windows NPS for authenticating users on the different SSIDs, with different authentication methods based on which SSID the user/device is connecting to. To do that, NPS needs to get the SSID, but the Aironet 1240 only sends its MAC address in the Called-Station-Id. I have read a bit about this, and found out that if I have a WLC, it will add the SSID to to the Called-Station-Id. But since we do not have a WLC, I am trying to get this to work anyway.
Is it possible to modify the Called-Station-Id to include the SSID on an Aironet 1240? If not, is it possible to send the SSID as a separate attribute that can be read by the NPS?

For your reference , please check the following two links about having custom VSAs on NPS:
http://technet.microsoft.com/en-us/library/cc754417%28v=ws.10%29.aspx
http://technet.microsoft.com/en-us/library/cc731611%28v=ws.10%29.aspx
Information about the custome attributes i mentioned above:
name : cisco-av-pair
ID : 1
Type : String
Direction: Both
Multiple allowed : True
IETF vendor code for Cisco is 6
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Turning on cisco aironet bridge without any antenna

I'm going to test two cisco aironet brigde with 21dB solid dish antenna to connect two buildings.
But, as first test, I want to config everything in the office, without mounting antennas.
Is it possible to turn on the bridge without antenna or this would damage it?

According to Cisco documentation, you should not power up an access point without it being connected to an antenna, so as to not burn the antenna leads inside the AP. Other documentation suggests that if you are going to power an AP without an antenna being connected, the AP should be broadcasting its signal at no more than 5 mW. This is supposedly not enough power to burn the leads.
It will not hurt the AP to be powered up for the configuration and testing phase. I would not allow it to run for more than one hour without antenna's connected though. I have configured over 800 AP's in the last year and 95% were not connected to antenna's during configuration.
Also, you may want to consult Cisco's site for the wattage setting with using the 21 dBi dish. I think the max is 20 mW when using the dish, based on the 1W max specified by the FCC.
Good Luck, I hope this helps.
David Beaver
Wireless Architect and Consultant
Dimension Data / North America

Aironet 350 with pismo antenna?

Hi people. I recently bought a cisco aironet 350 pccard wireless adapter for my pbg3 500. It works, i use os x 10.3.5. The problem is it doesnt reach very far. Last week a friend of mine came with his macbook and he had full signal at places where I could not even connect.
Doing some research I found that removing the fat sticker placed on the part of the card that remains outside the powerbook, there are 2 antennas and a jack for an external one. So I tought I could use the one built-in the display that is meant for airport cards. The problem is they can not be conected directly (the cable doesnt reach and the conectors are different anyway. To make thinks worse, the powerbook cable doesnt even have the conector, just the wire. I tried making a bridge between this cable and the cisco jack (using a 15 cm cable) but doesnt improve the signal, so I think im doing something wrong, or the pismo antenna is no better than whats built into the cisco card. Maybe someone here has some experience on using a non airport card with the airport antenna.
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Pepo

Thanks Brent. I have a spare ibook display that I can use for testing the antena. Problem is I dont want to burn the pccard amplifier. I dont know how the antena works, or if there is already an amplifier in the display, so if I connect the output of the card to the airport antena, I may burn the card. If I touch the antena lead it has power, as well as the pc card, so I dont think they can be connected toghether.
Also another doubt I have is actually how the antenna works. If I check the jack with a tester, I can see that the shield and the conductor of the wire arent isolated from each other, so then how do you wire them to the card when they are bridged already?
Sorry, hope I explain myself a bit at least, my english is not good enough I think for this kind of things.
Thanks again.
Pepo

Two TNC connectors on Aironet 1310 for external antennas

Hi All,
I have been checking the "Cisco Systems Aironet 1310 Intallation" manuals, and have noticed that the external antenna model has connectors for two antennas.
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I will appreciate any comments.
Best Regards,
Igor Sotelo.

Although you can't fit two antenna to service two connections you might be able to get it to work with a single omni on the "relay" station so it can "see" both the remote stations. I've used this setup before and sometimes you can route traffic end to end, sometimes not. A certain solution would be 2 x 1310 at the central point connected with a cross lead. That way you are running two separate bridge connections and everything will work just fine, needs another bridge though : (

Aironet 1310 with integrated antenna outdoor placement

Hi Guys.
One of our offices may be moving in the future to a building facing ours. Im thinking of buying 2 1310 outdoor AP/bridge devices intergrated antennas along with the roof mount kits. The buildings are in perfect line of site and our approx 33 meters apart.
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Hi Jason,
You are most welcome my friend! Set the Non-Root with this config ***Non-Root Bridge with Wireless clients***;
Q. What devices can associate with a bridge?
A. Root Bridge:
Accepts associations and communications with non-root bridge devices and clients.
Does not communicate with other root bridge devices.
Communicates with multiple non-root bridge devices.
Non-Root Bridge:
Can associate and communicate with root devices or clients.
Does not communicate with other non-root devices, unless the other non-root devices communicates with the root bridge.
Note: Both the root bridge and the non-root bridge will service clients only if the role in the radio network Root Bridge with Wireless Clients or ***Non-Root Bridge with Wireless clients*** is supported by the bridge and is enabled.
http://www.cisco.com/en/US/tech/tk722/tk809/technologies_q_and_a_item09186a008015502c.shtml#q10
Nice Step by Step;
http://www.cisco.com/en/US/tech/tk722/tk809/technologies_configuration_example09186a008058f53e.shtml#new1
Hope this helps!
Rob

Aironet 1240 ag setting dhcp range

How do I set up a dhcp range in the Aironet 1240ag access point? The access point is the dhcp server.

You can only set the DHCP scope on a AP from the CLI, so you would need to get console/telnet/ssh access. After that is the same setup as a router or switch.

AP Aironet 1240 connection problem

Hi there
I have a problem with my AP. Basically when I plug it in to the PoE switch it will start up (I can see the lights) but for some reason there is no light on the PoE switch. Looks like there is nothing connected. I chave changed the cable, port on the PoE switch but still the same. Is it possible that maybe few pins on the RJ-45 socket are demaged or there may be sth else.
The other APs start without any issues and the light is always on on the PoE switch.
I also need to add that the AP can not get the IP address.
Thanks for any help.

Hi
To state the obvious there are several possibilities:
1. A problem ethernet cable.
2. A problem AP.
3. A problem switch port.
4. Insufficient power.
So take one of your working APs and ethernet cables and plug into the suspect switch port.
If it works fine then the switch port is OK.
If it doesn't then you either have a problem port or possibly the PoE supply is being overloaded.
Connect a console to the AP and reboot. See what gets logged on the console regarding in-line power.
On the switch use 'show power in-line' and see what is reported for the switch port you are using.
Plug your suspect AP and ethernet cable into a known working switch port. If it works then the AP and cable are fine.
Regards
Roger

Cisco Aironet 1240 AG Access Point - configure Mac Address using Telnet

Hi there,
IÂve got a problem hopefully someone can help me with. I have the above mentioned AP and it is configured, working well and providing wireless access to several laptops on our domain.
The thing is I canÂt get access to the web-based interface to add new laptops Mac addresses to the AP as I currently have them secured with local list Mac address authentication but my user name and password when entered in the web browser login dialog box wonÂt allow me in although strangely it does allow me to login using the same credentials when I telnet into the AP.
Does anyone know why I canÂt get logged in using the web interface even though the user name and password does appear to be correct as I can telnet in? Also if you have any suggestions how I could sort this without having to perform the password recovery procedure, as I donÂt want all the config on the AP wiped and want to avoid having the set the whole thing up again.
As I workaround if anyone knows what the commands are to allow me to add the Mac addresses of the new laptops so they are added to the local list Mac address authentication list so the new laptops are secured that would be great.
Thanks in anticipation,
Tony

Your AP is probably configured to use the enable secret as the password. Try entering nothing for the username, and enter your enable secret for the password ('Cisco' by default).
If that doesn't work, post your running-config and we'll be able to see why it's doing that. It's a standard configuration, and no worries because wiping the AP won't be necessary since you can successfully Telnet in.
Jeff

WLC AND AIRONET 1240 LWAPP CONFIG

Hi all, Can anyone tell me what I need to do to configure my 1240ag access points to work with my wlc using lwapp.
Also how reliable are the wlc's should you use a backup wlc on each site ?

Your 1240ag must be an LWAP. Look at the back of the AP and check the model. If you see AP1242 then no, but if you see LAP1242 then all you need to do is stage the LWAP to the WLC.
Backups depend on your policies and how important the wireless will be to your byusiness.
Read this doc to help you understand better. Hope this helps:
http://www.cisco.com/en/US/products/hw/wireless/ps430/products_configuration_example09186a0080665cdf.shtml

Antenna`s cable for Aironet 1500

I will like to put the 802.11 b/g antenna (for clients) in a separate way from the Aironet. I know that the antenna AIR-ANT2455V-N has "N" type connectors. Is there a antenna`s cable for this application? is it possible to do that? My scenario is a Aironet 1500 over the roof of the buildings but the roof is a reflective material... that is the reason to I will like to place the antenna under the roof.
Thanks in advance!

Hi,
You can use any of the 50 Ohm impedance RF coaxial cables. RG-58, RG-8 or Heliax cables.
However, the losses because of the cable attenuation are critical. Since the antenna you have selected has only 5 dBi, this is even more important.
To avoid high loses, one must use fatter and higher grade coaxial cable. The RG-58 and it's low loss derivates (LMR195) are used for pigtails. For more than few foots the RG-8 and it's derivates (LMR400) is the next option. For over 50-100 foot's there is a need for very thick heliax cables.
There are special "N" connectors for those types of 50 Ohm RF coaxial cables. Since the connectors produce attenuation too, they should be of high quality and professionally installed.
However: those distances are appropiate for high gain antennas. An 5 dBi antenna shouldn't have a large cable.
Another way to solve the attenuation problem, is by using an amplifier. The amplifier is connected to the antena, so the cable extension stops being a factor and can be raisonably large (at least 150 foot for high grade RG-8 cable).
Best Regards,
Igor Sotelo.

Aironet 1240 + 12 dbi antenna

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