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Solved
CM400: Post-Reset Fast Speeds, then Slow (Downstream Channel Shift?)
I have a CM400 (Netgear) cablemodem, which has worked fine for the last several years. In the last 24 hours, however, I've seen it slow to a crawl. Resetting the cable modem - whether I do it, or Xfi...
For what it's worth, and for anyone that should find this in the future. Oddly enough, disconnecting the CM400 from power for some time (minutes) before reconnecting it seems to have solved the issue. Now, the uptime has been >60 minutes and the modem has continued to use the initial/boot downstream channel and has not "chased" the apparently bad-choice downstream channel as it previously had. I hope this helps someone else.
FURRYe38:
Thanks. Here's what the page looks like currently. I have performed several resets, and - like clockwork - at "uptime" of 13m0s is when it switches downstream channels and the quality drops.
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For what it's worth, and for anyone that should find this in the future. Oddly enough, disconnecting the CM400 from power for some time (minutes) before reconnecting it seems to have solved the issue. Now, the uptime has been >60 minutes and the modem has continued to use the initial/boot downstream channel and has not "chased" the apparently bad-choice downstream channel as it previously had. I hope this helps someone else.