said by k9iua6:
So far the only issue I've run into with my modem swap is that right now I can't access 192.168.100.1 for a modem status when I have things connected through the router, whereas I could when I first enabled the modem by directly connecting a computer. It worked before with the same router and the previous modem. I wonder if the downloaded default configuration for the Cisco CM100 from Mediacom disables this IP. I will do some more testing later today.
I just restarted both the cable modem and the router. Now I can get to the cable modem status pages at 192.168.100.1 like I used to, so the two devices just must have been in an unstable state.
I notice with the new configuration and now running D2 protocols that my download symbol rate is different that it was under D1.1. And now when I run speedtests, I actually get to see "speed boost" in action, which I never observed with the previous cable modem. So overall I am impressed with the results from this modest modem swap. I didn't realize for how long I might have been suffering from either a failing or inferior modem setup.
ADDED: I just noticed, looking at the modem status page again, that it is now definitely reporting a different software version than it did yesterday, so I'm guessing my restart just now activated new firmware that Mediacom's system had downloaded, which hadn't been running earlier.