One Device Crash Down Entire Network

Jul 21, 2011

I am in charge of taking care our small office network (about 25 PC's) and encountered a problem the other day. I got a call that nothing network related was working. I went to look at the switches/router and everything appeared fine. After some troubleshooting i found if i unplugged the switch and connected directly the the router everything worked prefect. Reconnected the switch, network goes down again. I assumed it was the switch at first but then did a walk around and a laptop was in a weird frozen state. I unhooked the network cable and everything started working away like it should.

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if its possible to set a maximum bandwidth for the entire wlan or for entire Vlan in the WLC 5508 ?

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Aug 6, 2011

After recently setting up a new computer, my entire network seems to randomly loose internet connection. The interval between connection losses is as short as half an hour but it sometimes goes several hours without dying; the connections is lost for anywhere between 30 seconds and 20 minutes each time it dies.The new computer is running Windows 7 and is using a Roeswill USB wireless adapter, but I have tired it with a wire and the connection still dies. I am disinclined to believe that this is caused by a virus simply because this is a brand new computer that has had only minimal use; to be on the safe side, though, I did do virus scans with multiple programs, however, I did not find anything.When the connection is lost, a yellow exclamation appears on the task bar's internet access icon. If I check my available networks, my network still shows full strength. I have tried disconnecting and reconnecting but nothing happens; I don't get any "failure to connect" type errors nor do I get connection back. I have also tried physically removing the adapter/wire and plugging it back in, but that doesn't do anything either.

I am under the impression that the new Windows 7 computer is doing something to temporarily kill the entire network, but I don't know what.For the record, my modem is an old Motorola and my router is an old Netgear. Both are quite a few years old, but I don't think they are the problem as my internet was fine before I added the new Windows 7 computer. There are wired computers and wireless computers running XP, Vista, and 7 also on the network.

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May 4, 2012

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Devices: Blackberry, Iphone, macbook (all wifi)
Computer A
Runs windows xp 32 bit,
amd processor
onboard video

[code].....

The internet modem runs to a router (Dlink dir615) then to a switch (or hub, if you will) and then to the 2 computers. The entire problem is solved by unplugging computer A from the system. But other than that I have no alternative.

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Jan 7, 2012

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And yet when I go to the URL I want to block it doesn't work! [URL]

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Mar 7, 2012

I have a the aforementioned router set up with one PC laptop connected via ethernet cable and two to five other devices (PC laptops, iPhone, iPad, Linux Laptop) connected at any given time. About once or twice a week the router drops the network. I can still see the SSID, but can't connect on any device. The wired laptop gets dropped as well. I tried to ping its IP, but it says the device is unreachable. The only solution is to walk upstairs and unplug the router, which fixes it every time until a few days later when it happens again. I've restored factory settings a number of times.

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Apr 10, 2012

I wanted to know if I can somehow setup my network to use a proxy for all connected devices?

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Nov 13, 2011

I just got a new notebook that has windows ultimate, and whenever i turn it on it knocks off all the other PCS on the network and the printer, including the one the router is wired to. I can only get it to pick up all 4 devices when i go into the Lynksys program and click change password. But then the program locks up and i have to shut it off manually.
 
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Oct 17, 2012

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Jan 9, 2012

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Network A: server OS is XP Pro - SP3, four workstations, XP Pro-SP3, Windstream DSL and Netgear Router. I have already bridged the router on this one, and it did not correct the conflict.

Network B: Server OS - Windows7 SP1, three workstations all XP Pro SP3, ISP is Clear (formerly clearwire). Router is the old wired Linksys befsr41 v4.

Network C: server OS - XP Pro SP2, ISP - Clear, three workstations - two are XP ProSP3 one is XP Pro SP2. I have had less trouble with this network, but I suspect the conflict exists here as well.

I have tried to get a static IP address from Windstream where I have had my worst problems, but cannot seem to get one. I suspect we have the least expensive service option possible, and are possibly using a service designed for home use as opposed to business, as someone told me recently that getting a static IP address can be expensive. Is this true? Currently all networks have DHCP enabled, and the routers are set up to use DHCP. My thoughts were to disable DHCP and assign ip addresses manually.

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Feb 6, 2013

About a week ago, our network started to experience complete failure.

Our Equipment:

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Wifi Routers: Dlink DIR-601, Linksys wrt54g, wrt54gv2
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All has been working together in harmony for many years.Fast forward to last week when my hell began with intermittent crashes.Not sure what's causing the problem.When it happens, everybody loses their internet, the ability to communicate over the network; ping tests won't respond to anything (including the router) that exists on the lan, even with a static IP against other statics.In visually inspection of the switches and router, they seem to be happily blinking away with no apparent issue (visually).The only way I've been able to fix the problem is by power cycling the router.About 1 second after doing that, we're back in action for 2-6 hours (very unpredictable).I never had to power cycle any other devices)

Steps I've taken in troubleshootingeliminating potential culprits:

Replaced the router with a spare (new) FVS318G

Replaced the power supply for the router (suspected because problem remained after router swap)

Replaced cable going from router to lan switch

Removed linksys wifi router from network (the router had needed power cycling weekly and was old. So I unplugged it)

Removed Dlink wifi router from network (I hate dlink routers, so removed it).I'm at a loss.

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Jan 30, 2011

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when this error occurs
 
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Apr 27, 2011

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Version 4.7.2

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[code].....

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