Mine was put into bridge mode for a day by a Comcast engineer and it was an utter disaster. Every hour or so the bridge function would fail and while the modem itself was up and connected to the internet, the bridge function failed and hence my network went down. Only a hard reset made it work again...for an hour. I had them switch it back and now the network is rock-solid. Note that the UI does not allow you to do it yourself.
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