Networking – Motorola cable modem regularly drops connection restarts itself

modemnetworkingwireless-networking

I have a Motorola modem SURFBoard SB4200, along with a wireless Linksys router that connects to that modem. The router works normally but the modem often dies and restarts itself after about 1-2 minutes.

What could be causing this problem? How should I start debugging it?

Could an excessive amount of network traffic be bringing down the modem? Are there any tools that can monitor the modem?

BTW, I use internet cable service provided by Comcast.

Best Answer

there is a feature called 'IP Flood Detection' that needs to be disabled. (It is located under the Firewall page) By default, it is turned ON. When ON, this feature eventually causes everything to slow to a crawl and randomly reset modem. Turn it OFF (uncheck box) This is certainly a failing on Motorola's part to default a poor-functioning feature ON in the first place.

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