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What are the issues that cause a router to hang? I have a router that has 15 machines of which 3 are on WiFi. Also there are 2 ip cameras. The network is entirely dedicated for a project relating to the camera, so the camera is accessed and video is streamed through that continuously. So my router doesn't respond once in a while. but a restart solves the issue. My router is a Cisco linksys E1200. Any help or suggestions on this ?

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Could be running out of connections. When you say "hang", what do you mean exactly? Are you able to ping it or access the web config? – Paul Dec 4 '12 at 9:27
@Paul i meant that the router becomes irresponsive. I cant ping the router. And the people connected to that doesn't have a internet access. I keep doing a power off and on. – rahul Dec 4 '12 at 9:30
@Paul What are the number of connections that such routers can have ? – rahul Dec 4 '12 at 9:31
The first step would be to upgrade the router firmware. Unless you have a loop somewhere in the network - do you have any other network hardware in this scenario? – Paul Dec 4 '12 at 13:19
@Paul I have an unconfigurable 24-port switch in this. Is that a problem ? other than that no hardware and no loop. But the camera do keep generating UDP packets. Is that a problem ? – rahul Dec 5 '12 at 11:39

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