Wireless traffic jam with Cisco E1000

35 pts.
Tags:
Cisco
Cisco Routers
Wireless Access Points
Wireless routers
I have 3 Cisco E1000 wireless routers units (being used as AP's only) covering a portion of a theme park.  Coverage is good.  Not too far away from each other.  During the day, the AP's work normally and allow connection to laptops and smart-phones with out any problems.  At night, the IP network the AP's are connected to has a increase in traffic, and the AP's reject those same connections.  How do I keep that network traffic from hitting the AP's, or can I set up the AP's to reject that network traffic? 


Software/Hardware used:
Cisco E1000 Wireless Router

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I had something similar to this but it was relating to blackberry users receiving and send mail on their handhelds. We have Cisco 1841 & Cisco 5505 ASA series.

You might look into load balancing since you have a number of APs and since its relating to a show. Might look into that….

Regards
NMM

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  • Gabe9527
    Are we talking about people trying to conenct to the AP's at night without permission? ie war hacking the encryption? If so you could use Air Defence software "http://www.airdefense.net/index.php" to control who is accessing your environment. There is also the ability to turn the AP's off at night. This should be a configurable setting for you POE device. I hope this helps.
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  • Lardog
    No. I'm talking about authorized users. Before the network traffic increases, these users can gain access to the AP's with any problems. After the increase, the users can't connect to the AP's. I want the to be able to connect. We are using encryption. WPA. it almost like a flood or packet storm to the AP.
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  • Pjb0222
    First question is how many connect attempts are occurring at once? Do you see a threshold number at which the issues begin happening? What are the self defense settings for the AP? You may need to talk to Cisco to understand how they are configured. One of the issues found by the wireless LAN team at my work (I am the client systems guy loaned to the WLAN team) is that having too many client systems attempting to connect to an AP at once triggered the AP self defense mechanisms and the AP refused all connections, EVEN EXISTING, for a preset timeout. (In this case specifically the TKIP self-defense so pushing to WPA2/AES resolved.) This caused a cascade as the client systems all then turned to the next nearest AP. Rinse and repeat until an entire area is locked out. Managing these settings were difficult and in some cases Cisco hard coded the settings with no method to turn off or tune. (*big sigh* Enterprise class systems with settings not selectable or tunable.)
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  • TomLiotta
    At night, the IP network the AP's are connected to has a increase in traffic, and the AP's reject those same connections. It's not clear what your problem actually is. Is it difficult to connect to the APs? Or is it difficult to connect through the APs to the network due to increased network activity (e.g., network bandwidth resulting in possible timeouts)? Tom
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  • Lardog
    @ pjb0222: It's not a matter of a number of devices trying to access. I know this because 1 minute the connection is fine and working, the next minute (after network traffic increases) the devices are kicked and can't reconnect. @ TomLiotta: I can't connect the AP's. I get a "Unable to join" message on iOS devices, and some similar on Windows 7 Pro.
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  • TomLiotta
    ...the devices are kicked... That makes me wonder if IP addresses are being duplicated. How is DHCP configured among the APs and network? NAT? These are routers being used "as AP's only". What address ranges are involved? Tom
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  • Lardog
    All nodes are static IP address. This is a closed system. I have checked for IP address conflicts. It is a traffic issue. Again, 1 minute all is good. The next minute ( after traffic increases) wireless devices can't connect. I know it is traffic issue because I know exactly when it increases. This is due to a show that runs at the same time every night and all the equipment ( lighting, audio, video) runs over IP network. Before we added the AP's this year, we used to connect for remote programming by cat 5e. We though it would be a good idea to go wireless. So what I'm saying, before we added the AP's, we had no network troubles. It's got to be the AP's, I just need to know what to do to properly configure them so the predictable network traffic increase does not affect connectivity to wireless devices.
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  • TomLiotta
    Do you ever use the ethernet ports on the APs? If so, do those also drop? The E1000s are pretty basic and dropped connections are perhaps the most common complaints against them. That's not very helpful to you, but might indicate that they just aren't appropriate for the environment. Tom
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  • Guardian
    I had something similar to this but it was relating to blackberry users receiving and send mail on their handhelds. We have Cisco 1841 & Cisco 5505 ASA series. You might look into load balancing since you have a number of APs and since its relating to a show. Might look into that.... Regards NMM
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