Cisco Wireless :: AIR-ANT1728 Best Antenna Selection For High Ceilings
Feb 6, 2012
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.
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Oct 13, 2002
Can I use the 2.4ghz (product #)air-ant1728 antenna on the new 802.11a cardbus?
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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.
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May 24, 2013
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.
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Jan 24, 2012
i want to install a 3500e. I have a hole in my wireless network where this AP will be a perfect fit. I do have a wireless controller running code 6.x, so I think I will need to upgrade to 7 which is not a big deal.
The problem I have is the antenna selection. Since the AP has MIMO multiple-inputs multiple-inputs I’m perplexed on the type of antenna to choose. Since the environment is a warehouse the Omni directional would be preferred - should I also add the dipole antenna for close proximity to the AP. Also, I noticed in the getting started guide the 3500e has 6 external connection points 3 for 2.4 and 3 for 5 GHz. The antenna documentation says to use dual-band antennas, but this contradicts what is shown in the getting started guide. So what antennas should I get to make the 3500e work in a warehouse environment.
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Feb 3, 2013
We have a campus with both office and industial areas with various propagation problems. Historically I have been installing and maintaining access points in the 1200 range, the latest being the 1242. All these have a similar antenna setup based on diversity pairs.Since Cisco seems to be dropping the old series any week now I have been looking at the 2602 as a replacement.I can find no good documentation on antenna selection and mounting suggestions for these.If I want a proper omni coverage pattern with dual band antennas, do I just set them to a H form assuming the unit is sitting on a wall?
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Jan 3, 2012
We are ordering new COWs (Computer On Wheels) for the hospital and they will be using an Intel 6205 Wireless Chip which is a/b/g/n 2x2. The two new floors these devices will be going on will be our first internal hospital entry into 802.11n which I force the clients to run in the 5ghz range for N. Previous to this, all of my cows are G clients and use a 2.2dbi rubber duck for 2.4ghz.
I will be using 1142 AP's, if not 3502 and no I have not performed a survey yet as the floor is still in early construction, but equipment is required to be ordered now. I can tell you that I will be surveying for a voice grade. I suppose my confusion comes from what is the best antenna (obvious open ended question) for this card, being it has two connectors for the 2x2. Again, typically I would use a 2.2 dbi rubber duck for either 2 GHz or dual band 2/5 GHz. Is dual rubber ducks at 6inch spacing (half wavelength met on 2.4 GHz fall back) suffecient or are there other factors involved with the N.
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Mar 22, 2011
tell me about this antenna
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Dec 12, 2011
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.
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Oct 17, 2011
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.
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Dec 2, 2012
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.
So a few questions:
Can i extend it ?
AIR-CAB050LL-R could fit?
The connectors should be 1 male, 1 female?
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Nov 12, 2011
what's the difference between High-power and High-gain wireless USB adapters.
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Jun 3, 2013
We have a deployment with six 1524SB mesh APs. Two are used as RAPs and face east and west respectively with directional antennas and two MAPs on each side with omni antennas. The RAPs are within 20 feet of each other. I set the bridge group name as east or west depending on which side of the mesh the equipment is located but noticed the downlink channel is set to 56 on both RAPs. I don't remember setting the channel for the RAPs, but they aren't using the global DCA.Would best practice be to change the downlink to unique channels on the RAPs, enable DCA (if it will let me), or is a unique bridge group name sufficient enough?
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Mar 12, 2013
We have a number of 1552e's deployed as RAP / MAPs, using a 5508 WLC. All those are working fine.I have a few requirements for an outdoor access point... not a RAP or MAP, but just a simple outdoor AP. I assume that if I use a 1552e for that requirement, I would place the mode in local, rather than in bridge mode, correct ? Also, a question on mac filtering. When setting up the mac filter, there is a drop down selection for "interface name". The radios seem to work fine with "none" selected, so I'm confused about what exactly that selection is doing. Is it simply a reference lable, or does it actually have a purpose?
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Apr 18, 2012
I have a RealTek 8187 USB wireless adapter on my desktop computer that has an associated utility that allows me to manually select which of several competing WAP's to connect to. But that is good only for that particular adapter. My laptop has a different make of adapter that does not have this capability and many of my friends and neighbors lack the capability also. I have a situation where when I turn on my desktop, it automatically connects to a certain WAP, presumably because it has the strongest signal. However, at certain times of the day, traffic or other unknown interference blocks internet access for varying periods of time. I can usually go to my RealTek utility and switch connections to another WAP that has somewhat less signal strength (for example from Channel 1 to Channel 9 -- all within the same Wi-Fi network). Almost always I can restore internet access by doing this.is there generic software available that allows manually selecting WAP channels regardless of the particular brand of wireless adapter being used. Or is there some setting in either Windows XP or Windows 7 that would allow selectively choosing to connect to one channel of a network rather than another even if the signal strength is less.
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Feb 11, 2011
My wireless adapter sees all the networks within range but I am not able to see them listed under windows network connection and there cannot connect even to my own network.
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Apr 18, 2010
I am working with a WRT320N for some weeks now, but I don't get the fact that 40Mhz channel width is only allowed for Automatic channel selection.I keep losing connection and the channel keeps changing.I want an option to change the channel manually (like in every good WLAN router!!), also with N data rate (40Mhz channel width).I know how to select the best channel, so why aren't I able to change it the way I like it?
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Feb 26, 2013
I use ACS 5.3.0.40.8 with TACACS+ servicing Device AAA and RADIUS servicing the Cisco Wireless environment for AD user access. How can I implement 802.1x with the current RADIUS implementation with hindering current wireless users or am I hindered due to the EAP-GTC in use with PEAP via RADIUS?
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Apr 1, 2012
This problem is on a Cisco E1200 (FW: 1.0.03) and using a browser to modify the routers settings.I'm connected to the router from a wired connection, and I'm trying to turn off the encryption, and just have the router have the setting "disabled" as the selection for "Wireless Security".
However, it seems when I do this, the moment I press "Save" the router gets disconnected from my computer (the wired connection) and the only way to get reconnected is to run the Cisco Connect software from the computer that's hard wired to the router.
Once I get back to that screen in the routers settings, and try it again, the same thing happens.If I change anything else under the routers settings, the connection stays connected, but only when I change the wireless security settings to disabled I see this problem.
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Oct 8, 2011
I'm trying to register my new linksys e2000-ew wireless router but it doesn't show up in the selection pull down menu. When I try the e2500 it says my serial# isn't correct.
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Oct 13, 2011
Today I've received reports of slow internet access/activity and have noticed myself that it seems a bit slow today. On the dashboard of our asa 5510 the "outside interface" traffic usage is running constantly high. It's at the top of the graph. How can I tell what is causing the spike in utilization. It usually runs at about 1500-2000 Kbps, and now it's up over 10,000.
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Nov 26, 2012
We installed a solution with 2 Cisco 2801, BGP multihomed failover.
1) The router which is currently getting all the traffic gets to 55% to 60% of CPU usage when handling 40 SIP/RTP streams . This equals 10Mbit up/10Mbit down and it showed around 5800 packets TX and around 5800 packets RX, with a majority of them CEF switched. As those figures are way less than the performance figures published by Cisco, we wonder if we made any mistake in setting up our router, or if we can do something to improve the router setup.
2) Does it have an impact on router performance if we increase/decrease RTP packet size, thus increasing or decreasing the pps relative to the consumed bandwidth?
3) If it is not possible to improve router configuration, we also wonder about possible replacement units for those routers. Would a 2901 do a good job? By how much would it rise the capacity? What other models would you recommend if we plan to rise the number of concurrent calls by a factor of 4 or even 8 times of what we have now (so up to 48000 pps and 80Mbit).
Here is what we tried:
- ip route-cache same-interface does not seem to improve anything
- ip flow ingress on or off makes no difference
- disabling the inbound ACL on fa0/0 seems to reduce load by 10%, although I don't understand why - a very high percentage is CPU interrupts, and ACLs are process switched, or not?
- we tried following the Cisco guide for high CPU due to high interrupts, with no success
Here are some usage statistics:
The graphs that we plot via SNMP show a propotional growth/increase of CPU and bandwidth (and thus pps) At the highest loads, we had a bit more than 55% CPU utilization with more than 50% interrupt CPU.
CPU utilization for five seconds: 36%/30%; one minute: 30%; five minutes: 30%
PID Runtime(ms) Invoked uSecs 5Sec 1Min 5Min TTY Process
127 13140 954 13773 2.00% 0.29% 0.07% 194 SSH Process
[Code].....
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Sep 7, 2011
I have a router with 2 WAN (MPLS) connections to two different IPSs.One connection is a 3mbs MLPPP connection and the other is a 10mbs MetroEthernet connection.Both use BGP to peer up with the ISP with private AS numbers (65001, 65002, etc)I want the router to always prefer (use) the BGP connection through the 10mbs link, but here are my considerations:I can't change the prefix length for the peers. In other words, BGP 65001 is going to advertise 192.168.21.0 /24 to its peer, and BGP 65002 is going to advertise the same network with the same mask.What is the best way to make sure the 10mbs link is always preferred? Can I do local preference?
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Apr 26, 2013
I have sub-interfaces created on the switch and are in active(up/up) state,but these sub-interface not available for selection in the instance window while creating the poller, and am not able to monitor the traffic on these sub interface in the performance management.
LMS will not display the interfaces in the instance selection window if they are not active, but here the sub-interface are in active state but these are not available.
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Jul 4, 2011
I am designing a new NAT configuration for an ASA 8.4
On my PIX 8.0 configuration I needed to allow bidirectional traffic between interfaces with different security levels. For example, Inside at 100 and dmz at 50.To accomplish this in 8.0 I used a static NAT command along with any necessary ACLs.
I now need to apply this same 8.0 config for 8.4. With the static command not availablein 8.4 I am unsure of which NAT commands to use to achieve the bidirectional traffic.
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Jul 29, 2010
I need to update from older Cisco 350 Aironet 802.11a/b Wireless CardBus Adapters to Cisco cb21ag Aironet 802.11a/b/g Wireless CardBus Adapters in rugged tablet pc's. I need these without the antenna cap present to utilize the tablets antenna sytem. They are pictured on the Cisco website but Cisco partners I've contacted have been unable to assist me in purchasing them.
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Dec 10, 2012
I have a AIR-LAP1242G-A-K9. I have several question:
1. Does the antenna is a MUST for it to work.
2. If I have a 1 unit of AIR-ANT2422DG-R (antenna) , does the wireless access still work? Do I need 2 antenna
3. If I have a 1 unit of AIR-ANT2422DG-R, does 802.11 b supported.
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Mar 2, 2012
I connected an external 12dBi omni-directional antenna for Networks 2.4 Ghz (TL-ANT2412D) with LMR-400 cable 5M but my antenna "emits" nothing, I have no signal. With the two supplied antennas with WAP200 I signal but does not cover any desired area.
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Sep 20, 2012
I multi homed to dual ISPs using a single 6509e. Currently, I am only receiving a default from wash ISP and marking one with a higher local pref. most of my traffic flow is inbound, so this config meets my need. The issue I have: if either ISP has has an outage upstream from my directly connected peer, my router does not detect that and continues to send traffic out thru that provider only to be black holed. My 6509 will only support 256k routes, so full route tables isn't an option. I could receive partials from each ISP. Is there any other method to detecting this upstream ISP issue and then adjusting my local pref on my default to use the alternate provider path?
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Mar 4, 2013
I multi homed to dual ISPs using a single 6509e. Currently, I am only receiving a default from wash ISP and marking one with a higher local pref. most of my traffic flow is inbound, so this config meets my need. The issue I have: if either ISP has has an outage upstream from my directly connected peer, my router does not detect that and continues to send traffic out thru that provider only to be black holed. My 6509 will only support 256k routes, so full route tables isn't an option. I could receive partials from each ISP. Is there any other method to detecting this upstream ISP issue and then adjusting my local pref on my default to use the alternate provider path?
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Jun 11, 2012
We purchased an ASA 5505 (ASA5505-BUN-K9) and more recently purchased the license to upgrade it from 10 to 50 users (L-ASA5505-10-50). I would like to provide remote access to users via AnyConnect - specifically, AnyConnnect on Windows plus the iPhone/iPad and Android versions. My understanding is that I should purchase the Anyconnect Essentials (L-ASA-AC-E-5505) and Anyconnect Mobile (L-ASA-AC-M-5505) licenses. Is this correct? If I do this, how many simultaneous remote access VPN connections (via Anyconnect clients) will the ASA then support?
Further, we did not initially purchase Smartnet with this device, but I would like to do so to gain access to software updates. Is there a site or document where I can locate the SKU #'s for Smartnet contracts that would be appropriate with our device?
The output of "show version" is below:
Cisco Adaptive Security Appliance Software Version 8.3(1)
Device Manager Version 6.3(1)
Compiled on Thu 04-Mar-10 16:56 by builders
System image file is "disk0:/asa831-k8.bin"
Config file at boot was "startup-config"
[code]....
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Feb 21, 2011
We are going to purchase a Device , thte sites and also VPN server for remote access ( EzVPN), Should we use ASA or should we use Cisco 1800 series router with security software. The main purpose of this device is to terminate all VPN connections ( Site-to-site) and remote access.
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May 4, 2011
Our company is in the process of replacing our old firewall with a Cisco ASA since our old firewall can handle only 170 concurrent users and we are expanding fast. Can I know what are the considerations when selecting from the different models of ASA currently we are debating if we should buy a 5510 or a 5520 also can I know if cisco ASA also have a limitations on concurrent users online in a lan like our old firewall. By the way we are a Call Center company(going 500 seats) so we are using VOIP(Asterisk using SIP and IAX).
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