08-20-2010 10:35 AM
08-20-2010 10:40 AM
The bigger issue is security, if they have an open or easily compromised AP (WEP, bad PSK, etc.), you risk having an open port into your network accessible from the outside. Someone sitting in your parking lot now potentially has internal access to your network. Your boss probably doesn't want to be responsible for a security breach :)
Your Aruba WLAN will continue to function, and ARM will move away from the interference, but as you just bought a centralized WLAN you might want to go take out the random router installed on your network. What is it that he needs that AP to do that you can't provide with the WLAN?
Director, Strategic Account Solutions
08-23-2010 05:39 AM
I personaly say that they should be gotten rid of, but it is hard to take away something once they have it. I have since convinced him to not put the rogue AP in do to the security risks you mentioned above.
I was simply triying to explain to him about interference and did not have the knowledge to convince him, as he said " I think you're blowing smoke up my ..."
08-23-2010 11:46 AM
INTERFERENCE 101.... :)
If your system is 802.11b/g (2.4 GHz), you can tell him this :
In 802.11 b/g there are a total of 11 channels (assuming deployment in the United States). Of those 11 channels, ONLY 3 are not overlapping... in other words, only 3 are "clear channels". Those 3 channels are 1, 6 and 11.
So, let's assume that your system has 3 access points. The controller will assign each access point to a channel with the least amount of interference - meaning, the controller might assign one AP on channel 1, one AP on channel 6 and one AP on channel 11. Those are the 3 "clear channels".
Suddenly the teacher fires up his rouge access point, and it is on channel 4. That means that your APs on channel 1 and channel 6 are now experiencing interference. Where does the controller move them to avoid the interference ? No matter what the controller does, 2 of your APs are now experiencing interference.
The controller (via ARM) can attempt to mitigate that interference, but it does not eliminate it. Your teacher and his rouge access point has now caused degradation to your system.
Hope that helps.....
08-23-2010 01:33 PM
I personally love to find these kinds of things around ^^