Cisco Wireless :: 1242 - How Many AIR-ANT1728 Antenna Can Be Connected
Feb 27, 2012
I have a set up 50 qty AP1242 (AIR-LAP1242AG-E-K9) installed with a single (1 qty) ANT1728 Antenna..I am not happy with the coverage..Is it possible that I can add another 1 qty of ANT1728 antenna to the exiting AP1242 to imporve the coverage?
AP1242 had dual RPC-TN connected. But I am not completely sure that wether 2 qty of antenna (ANT1728) can be connected to a single Access point (AP1242). I am also concern regarding the power requirement.
I would like to upgrade my existing Wlan to the following configration -AP1242 connected with dual antenna (AIR-ANT1728 x 2 qty) to improve the coverage.
the best antenna to use in high-ceiling environments, as in 25 feet or higher. He was in favor of using a high gain, omni, such as a the AIR-ANT1728. I was against this form of antenna due to their increased horizontal radiation and decrease of vertical. I was more in favor of an antenna similar to AIR-ANT24 30V-R. I've seen successful deployments with both options, but curious what the community has to say on the matter.
What is the maximum distance or safe distance this antenna can cover. I am using Aironet2602E access point. Because i couldnt understand the radiation pattern. There is 5 circle in the Radiation pattern but i dont know how to convert this is distance. Its only showing the DB.
Currently have access points located throughout our warehouse that use the AIR ANT5160V-R antenna's from Cisco. These AP's are 25' in the air. However we have a lot of voice quality issues off of the 5Ghz band, we do no other services on this band as we keep data on the 2.4Ghz.This was all installed by a vendor but from what I am seeing on the documentation [URL] the cover is extremely poor for these antennas despite AP's everywhere. They cover side to side but aren't a well rounded AP at all.it seems like the AIR-ANT5145V-R would be better suited even though this is a warehouse.
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?
We'd like to work with Motorola MC3190 a/b/g handheld scanners in our warehouse so we need WiFi connectivity there. The warehouse has concrete walls and is divided into two parts - loading bay 18m x 42m (59ft x 138ft) and main warehouse building 44m x 42m (144ft x 138ft). The loading bay is just a simple hangar with gates mostly open, temperature could be very low there, down to -20C, the right thing would be to install an external AP there but still I want to get along with the signal from the inside.
Some very basic site survey with the Cisco 1242AG ap shows that there is -70db signal at the loading bay from warehouse AP. What do you think about mounting the antenna at the loading bay and connect it to the AP inside the warehouse? The actual ceiling height is 8m (26ft) but the steel beams are 6m (20ft) from the floor and that will be the mounting height of the AP's. (I think it's rather high though). Storage racks are made of metal and are up to 7m (23ft) high. Stored materials are mostly different types of fiberglass cabling, polyethylene, steel cabling, steel wires, metal barrels.
The environment is very dynamic and it's rather hard to predict the actual RF situation so I'm trying to determine the worst case scenario. So I'd like to use 2504 wireless controller with five 3502e AP's with ANT-2422DW dipole antennas mounted at the ceiling beams in the warehouse at 6m height. My thought was to set scanners to work in b/g band (there will be several laptops there too). There is a little diagram attached below.Still think it's too high, and doubt about the antennas. Are there better choices for such a setup? Maybe with wall mounted antennas?
Im cleaning up a recently inherited WCS server. The map im currently working on has the 1242 ap with AIR-ANT1728. When configuring the AP what should the elevation be for the antenna. It is currently set for 0 up with an azimuth of 90 degrees. All the AP's in our plant our mounted on roof girders with the antennas pointing down.
We have a vehicle with an AIRONET1300 wirless bridge and an outdoor antenna that looks like the AIR-ANT1728 for wirless point to point between two vehicles. I say looks like because I have no documentation as to what it actually is.
We have a 2800 router/HWIC-3G-CDNA-S 3G card with the small indoor antenna 3G-ANTM1919D for remote access to the cell phone towers.I want to buy a larger antenna for the 3G and move it outside of the vehicle.
My question is if I buy the 3G-ANTM-OUT-OM can I mount it outside on the same pole within inches of the AIR-ANT1728 ?
It seems one operates in MHZ and the other in GHZ but i'm not sure what mouting two strong itms like that together will do.
I just realized that my internet is slow when my antenna is on top of my computer. I have a pci card with an external antenna connecting to it. If it's on top of my computer, my internet is slow, but if I move it three feet in front of it, it's fast. This makes me think that my computer is somehow blocking or conflicting with the signal. Is this normal, or is there something I can fix in my computer? Download speeds with the antenna on top are around 0.54Mbps, and if I put it as far away as I can, I get around 20Mbps.
I 'm administration an Aironet 1242ag, and we are currently buying an AIR-ANT1728 as antenna. The standard cable for the antenna is 0.9m long, and It could be insufficient for my needs.
I'm using two cisco 1242 AG access points to configure WDS feature. I've named the accesspoints as AP1(acts as WDS) and AP2. Since I've only two accesspoints, I've configured the AP1 to act both as a WDS and as a regular accesspoints.Further I'm using the local radius server within the AP1 to authenticate both clients and infrastructure accesspoints. And both APs are connected to a router (which act as a dhcp server) via a unmanageble switch and both accesspoints are getting registered with WDS.But the issue is when I tried to connect to the configured SSID, it promts me a "authentication window" but after entering the configured username and password, i'm not getting authenticated by the AP.
I've attached the configurations of both APs to for your reference and I've used the following cisco document as a guideline to crate the WDS. [code]
I'm having a little issue with some Cisco Aironet1242ag WAP's. I receive a call at least twice a month stating that some of the WAP's are not giving out internet connection. What I always do is go to my patch panel and disconnect those WAP's not working and connect them back again so they can power cycle. These WAP's are connected to a Cisco3750g. Once the WAP's boot up, the users can connect to the WAP and connect to the internet.
I don't know if these WAP's are filling up with some information that causes the access points to not connect to the WAN.
Is it possible to make a bridge using a 1242 and a 1310? I have been able to get them to associate together and it appears it will function as a bridge. I have the 12(4) 253 JA IOS for both devices. I would like to use the g antenna on the 1242 for the bridge and the a antenna for wireless clients. The configuration on the web management appears to support bridge root and non root for both devices.
I am trying to upgrade an autonomous IOS 1242 AP to LWAPP and I am having an issue with finding the right code to complete the upgrade. I have upgraded the AP to c1240-rcvk9w8-tar.124-21a.ja2.tar, but now I think I need a JX version of code to have it join a controller, and I can't find this anywhere on the Cisco site.
i need to change the IOS in a Ligthwiegth Access point and make it work as an Autonomus AP 1242. I have got the image but im not realy clear about the process. I got to enter the Ligthwiegth Access point true the console port but i dont know how is the upgrading process.
One of Cisco Wireless AP 1242 installed in my premises restarts itself; AP is getting power from Catalyst 2960 POE. I am using multiple SSID on this AP. I have issued the show tech-support. I have seen below in tech-support System was restarted by unknown reload cause - reason ptr 0xF, PC 0x46FEB8, address 0x0? what could be the reason of restarting of AP. AP is in production since 1 year and it restarts seldom.
When I tried to add new AP 1242 to my network I had following problem:
The Ap was constantly reloading and I was getting message
Wed Mar 20 13:32:12 2013 AP 'UBFT-E06-F0A-R09-0022.901b.a6ba', MAC: 00:23:ab:27:1f:30 disassociated previously due to AP Reset.
%CAPWAP-3-IMAGE_DOWNLOAD_ERR3: capwap_ac_platform.c:782 Refusing image download request from AP - unable to open image file /mnt/ap_bundle/ap.pri//c1240
I decidet to reinstall software on WISM 2 modul (7.2.111.3) this fix the problem and AP joined controller but during this process I have lost connection to 87 AP for 3 seconds and then they joind back again.
I have 3 Cisco 1242 WAPs that I have deployed at a site that has NO RADIUS/AAA devices. I have given all of them a different channel (1,6,11), but the same SSID and crypto (WPA2-PSK). The issue is when a machine boots up it associates with the closest/strongest AP, but as the device "roams" it does not which to a different AP. It stays associated with the original AP until that signal is gone. Then it quickly associates with the closest AP with no problem.
How do I get the device to associate with the strongest WAP? I have research "fast roaming and WDS" but it seems like you need EAP/LEAP and they do NOT have that at all.
I have Eight AIR-AP1242AG-E-K9's accross our site that have 2 SSID's and 2 VLAN's that work well, I want to link one of the AIR-AP1242AG-E-K9 to another one using 5ghz patch antennas across a 50 metre gap, but I am puzzled on how to do this, as to create a root bridge and a non route bridge link I need to put the infrastucture SSID on and this must be on VLAN1 but I want the traffic from both VLANs to pass over this link. I just want to ensure the config will work as I need to go into a cherry picker to get to the non-root-bridge.
We currently have 8 1242's and they all work fine, however we recently baught one 2nd hand one which was previously connected to a WLC, it lights up fine but it wont detect in IPSU even though the dhcp has assigned an IP to it. I would like to login through the web page to configure it but I am not able to do that either. It responds to ping fine though. So I no longer wont it be a LAP, so I tried to console in, to run flash_init etc. but when I try and give the <ESC> command (during the flash loader) it just carries on and ignores all input. I have used the correct settings Baud rate 9600, no parity, no flow control , databits 8, etc. but nothing happens it just goes through the boot and then asks me to press enter to input. i can then browse the directories and rename files. but I just cant get it to holt the loader so I can reset, I tried rename of config.txt and env_vars but that has't worked either. It keeps stating that it is looking for LWAPP/CAPWAP but unfortunately we don't have a WLC Is there another way I can reset it or is there some magic way in whic I can send the ESC command.
I encounter a strange problem on several AP 1242 in version 12.4(25d)JA1 of a customer : He has 10 autonomous AP covering The APs loose LAN connectivity randomly and therefore the clients don't work anymore. The AP are connected on a 2960 and a 3560 wich are in turn connected on a 3750 wich route the trafic.After checking spanning-tree no loops are present. When I check the counters on the AP involved I see the "trhottles" and "ignored" counters incrementing on the fa0 link of the AP impacted wich mean I think it can't handle the incoming traffic. This incoming traffic seems not to be too big however. I can see drops on the switch interface connecting the AP.
we had a problem with a customer wlan in our warehouse (cannel overlapping). The troubleshoot needed a long time. For the future if requipred in case of problems i want to configure one access point in the warehouse as a scanner (please find picture in the attachement). The Autonomous cisco 1242 is now configured as scanner but i can't see any logfiles? Where can i find these informations. This is the cisco description of the scanner mode:Scanner—Functions as a network monitoring device. In the Scanner mode, the access point does not accept associations from clients. It continuously scans and reports wireless traffic it detects from other wireless devices on the wireless LAN. All access points can be configured as a scanner.
I have cisco LWAPP 1242 AP already joined controller but 802.11b/g shows down on the radio 0 interface. I tried to enable it but it comes with an error" Error in enabling admin status". I have resetted the AP to factory default settings and even replaced with NEW AP.
I try to change the AP mode of my LWAPP 1242 from local to bridge mode. But when the AP reboots it never associates with the controller, i have to reset it manually.I have the same issue with a LWAPP 1142.I tried to modify the AP mode configuration through the controller CLI but it's the same behaviour, AP never associates.Is there any particular parameter or configuration to perform before changing AP mode?
At intermittent times, we will have a single device start to "hide" behind a 1242 bridge.In the past, my team would reload or reboot the bridge, and everything would come back up.But the 90 seconds of lost data were causing problems.
I found the the WB was always available.So I would ping the hidden device from the WB, and it would ping.Next, I showed the ARP table, and got the MAC address of the hidden device.Then, I would start a ping from my PC, and leave it running. Constant "Destination Unreachables" from the router.Next, I showed the bridging table for F0, and sometimes the device would be there, sometimes not. I would add a forwarding bridging entry manualy, and exit conf.
Showing the briding table would show the device, with a "P"ermanent age, but still no pinging.Finally, I would remove the forwarding briding entry, and pings would start within a couple of seconds.During these periods, outbound UDP packets will continue to be forwarded from the PC.So, my managers want to convert everything to UDP, which is a potential disaster in my opinion. [code]
However, I now have a number of devices... certain smartphones so far... that will NOT connect to a FlexConnect AP if it's a 1262AGN AP, but my older 1242G AP will accept the devices without issue. Same SSID, same encryption standards.
If I connect the devices to my guest network (no security), they will connect just fine to both APs, and Non-FlexConnect 1242 and 1262 APs will both accept the devices without issue using my private network.
In other words, it seems to be an issue specific to 1262AGN with my encryption security. My security is WPA2/AES with PSK. No additional security on the SSID.
I have a high school wireless environment that was installed approximately 5 years ago with 1242AG APs. The install was done based on 2.4GHz coverage everywhere, not for 5GHz or for good density. The high school uses wireless cisco 7921G phones for all the staff and teachers. The issue we're running into is over the last couple years more and more students are bringing in iPhones and android phones that can connect to the public wireless ssid. And with the increase of these wireless devices in the classroom, we've been experiencing more and more call dropped on the wireless phones. I have collected information on number of clients on specific APs that are in the area of most of the dropped calls. At times some of these APs have a total of 40 clients associated to them, over half of which are on the public ssid. I have thought about putting all the phones on to the 5GHz radios, but the implementation of the wireless was only for 2.4GHz coverage, so we have coverage gaps on the 5GHz network. We're thinking about adding more APs but the budget isn't available yet for that, so we're looking at what we can do to make this better for the time being.
Main questions are:
Is there a best practices number of max clients per AP in a wireless voice network?
Are there any other options for preventing dropped calls on the wireless?
I should mention I have already looked over the VoWLAN Troubleshooting Checklist at the link below and made the necessary changes to assure we are following the items on the checklist as close as possible.URL
we are using wism 4404 code 4.2 , we are using this old code becuase of 1250 mesh APs, now when a user connect to our network and he is using intel proset software he can see details of our AP, like mac, type and AP ip address 9 which in this case it the controllers ip address) is there a way we can prevent the ap from showing it?...we will be doing an upgrade to 7.0.230 soon. will the upgrade takes care of this problem or there is a way to fix it.
