I'm running similar issue the last month or so, since an upgrade of service in the area.
Tue Dec 18 23:08:59 2012 Critical (3) DHCP WARNING - Non-critical field invalid in response.
Tue Dec 18 23:08:50 2012 Critical (3) No Ranging Response received - T3 time-out
Tue Dec 18 23:08:34 2012 Critical (3) DCC aborted unable to acquire new downstream channel
Roughly every 1/2 hour... Sometimes it skips...
I've done my research on this one, and getting techs arguing, REFUSING to look at the MODEM logs (only their remote logs)
They REFUSE to admit there's a problem with the line (downstream channel overlap!!!)
I just spent 20 minutes arguing with a tech that it was NOT the modem (5 replaced in the last 2-3 months), and NOT the network card on my computer (errors while modem is connected, powered on, but, unplugged from computer)
Have an ACTIVE forum post »
communityforums.rogers.c ··· -id/8749 from them as well.