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Multiple times a day, my SB8200 modem is cycling through the process to select / apply the best Profile.  It is a set of three lines that appear in Event Log beginning with: US profile assignment change, MDD message timeout, and CM-STATUS message sent.  It is not clear which of the three is the ‘first’ in the series.  The logs are followed my my MAC address and the address of the CMTS-MAC address at the other end (COX).  It cycles between Profiles 9 13, 10 13, 11 13, and 12 13.

The modem / service seems to be working fine otherwise, but this continuous cycling makes me think something is wrong.  This began about 3 days after a senior Cox tech was on site to fully clean my install including eliminating some ingress sources which coincidentally resulted in now showing blue 3.1 Upload in addition to 3.1 download.

Here are the full lines with my MAC address deleted.

US profile assignment change. US Chan ID: 8; Previous Profile: 10 13; New Profile: 11 13.;CM-MAC=xx:xx:xx:xx:xx:xx;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.1;

MDD message timeout;CM-MAC=xx:xx:xx:xx:xx:xx;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.1;

CM-STATUS message sent. Event Type Code: 1; Chan ID: 160; DSID: N/A; MAC Addr: N/A; OFDM/OFDMA Profile ID: N/A.;CM-MAC=xx:xx:xx:xx:xx:xx;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.1;

Thoughts?

Hello BILLinAZ

                          The logs are Values read by technicians from the internet provider end, since the logs are what the coaxial cable transmits and the log screen on the router is the translator so can be easily read by them, the coaxial cable is owned by the Internet service provider, I wouldn't be able to tell you what that means.

If your Event Log is reporting a high volume of errors, this would indicate a potential CMTS signal issue. To troubleshoot these errors, we would like to note the current signal levels being used by your (sb8200).

                            If your modem is rebooting and the power light on the modem goes off and on you need to check the power cable and the power outlet and if the internet is intermittent you can try resetting modem for a minute without coax cable.

​​​​​1 The levels on the line are perfectly within spec based on the senior ISP tech and his boss having done a house call to ‘clean up’ the aging 25 year installation the week prior to this new firmware being pushed.  I can send the levels if you tell me how to attach as a screen shot or cut and paste pdf.

2 The ISP techs have little to no interest to look at the modem’s event logs in lieu of using their own meters.  I have printed the logs to show them and very competent senior techs don’t know what the various lines mean.  They just look for signal levels and interference / ingress.

3 The modem is not rebooting and I already did the factory reset without cable connected.  The service does not seem to be affected.

4 So WHO can tell me what these repeated Profile seeking episodes mean?

Modem switching to the right profile are the configuration of the ISP while activating modem so its completely on the internet service provider end so you need to check with your ISP only.

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