JHatz
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Technology Coordinator
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United States
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If your office also serves as a server room - locking it is absolutely warranted whether or not you are in there. My office and my server room are separate - I keep my door open - but I'm at the back of the school office so no students walk that far in. I keep my door open when in there - and locked when I leave/
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I haven't run into this - my lease time is set only for an hour though ( 3600 seconds). I've only run out of addresses on three occasions and they never persisted past the hour mark.
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Rebooting Meru 832AP's bring down entire network (wired and wireless)
JHatz replied to JHatz's topic in Wireless Networks
I've got tickets opened with both Meru and Extreme - neither have come up with anything yet thus why I decided to try here - was hoping someone else has gone through this sort of thing and has the answer. -
The Safe Mac » MacKeeper - all you need to know about why you don't want to use MacKeeper.
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Youtubes safety mode hasn't been working right for weeks now - I'm allowing it to be turned off.
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With Google for Education or Business you can create distro lists, share mailboxes by assigning delegates, add shared contacts etc. I switched jobs going from private sector that when I started had no email - we started with Exchange 5.5 I believe and when I left we were on Exchange 2003. I went to a public school district that was using FirstClass - talk about painful (for me - they were used to it) - I made it my first priority to get them onto GAFE. Never regretted it. Would never go back to Exchange. There are also some useful command line tools like GAM that I enjoy using.
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I have Meru 832e AP's in my High School - all connected at Layer 3. I use a Meru 3200 controller and its connected to my core switch which is Enterasys. The switch was put in about a year and a half ago - the Meru AP's were put in this summer ( I had 320i's previously - with no issues - but they were L2 at the time). I am able to take down our entire network by simply rebooting three or more of the AP's - meaning wired and wireless connections no longer get to Internet or internal addresses - running pings gets maybe one response out of 20 or more if lucky. To get my network back - in most cases I can simply unplug the Meru Controller's ethernet cable from the core switch - wait 30 seconds - plug back in - and after maybe 20 seconds the whole network is operational again. In some rare cases I've had to reboot the Meru controller. I can replicate this at will by simply unplugging or rebooting three AP's. If I do only one - it will take the whole network down for the time it takes four pings to be dropped - then things come back for five or six pings - go down again for four pings then things go back to normal. I've had one instance when our network went down like this - except I didn't reboot any AP's manually - and we only lost Internet traffic - not internal connections as I could still talk to servers in our buildings. I tried unplugging the ethernet cord to the Meru controller and plugging back in - then I lost the internal network as well - I had to reboot the controller to bring things back to normal. We've done some wiresharking on the controllers port - and don't see anything I'd call flooding - looks just like normal amount of traffic. Nothing is standing out in the pcaps. It almost seems like it could be ARP cache poisoning - but I don't know how to prove that. Anyone else ever come across anything similar?
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I have an interesting situation since I've put Meru 832e's in our high school. Whenever I reboot three or more - my entire network - goes down. If I reboot just one - I lose network connectivity district wide for probably ten seconds (our pings come back as unreachable) then normal network resumes. When rebooting three or more - maybe one ping in 20 get to their destination - if lucky. When I say entire network - I mean it - wired, wireless - internal and external communications - all gone. To "fix" this - in some cases I can just unplug the ethernet cable from the Meru 3200 controller, wait a few seconds and plug back in - usually network goes back to normal after fifteen to twenty seconds. In some cases I have to reboot the Meru controller. I can replicate this anytime by rebooting three AP's. Anyone else ever have a similar experience? I am starting to believe it may be ARP poisoning.. we've run wireshark against the controllers swith port and don't seen any flooding going on, nor anything in the pcaps that jump out at us. Our network switch is Enterasys - just over a year old. The Ap's were installed this summer and I didn't reboot any AP's until last month when I was upgrading them and the controller.
