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s_s_K_l's avatar
s_s_K_l
Follower
Jun 14, 2020

CM500 - Improper Configuration File CVC Format

My Internet keeps disconnecting very frequently and I have "Improper Configuration File CVC Format" in the logs. Also the logs,

 

Time	Priority	Description
2020-6-14, 17:57:15	Critical (3)	Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=;CMTS-MAC=;CM-QOS=1.1;CM-VER=3.0;
2020-6-14, 18:57:59	Critical (3)	No Ranging Response received - T3 time-out;CM-MAC=;CMTS-MAC=;CM-QOS=1.0;CM-VER=3.0;
1970-1-1, 00:00:21	Critical (3)	SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;;CM-MAC=;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.0;CM-VER=3.0;
1970-1-1, 00:00:26	Critical (3)	No Ranging Response received - T3 time-out;CM-MAC=;CMTS-MAC=;CM-QOS=1.0;CM-VER=3.0;
1970-1-1, 00:00:21	Critical (3)	SYNC Timing Synchronization failure - Failed to acquire FEC framing;CM-MAC=;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.0;CM-VER=3.0;
1970-1-1, 00:00:30	Notice (6)	Honoring MDD; IP provisioning mode = IPv4
1970-1-1, 00:00:32	Warning (5)	DHCP WARNING - Non-critical field invalid in response ;CM-MAC=;CMTS-MAC=;CM-QOS=1.0;CM-VER=3.0;
2020-6-14, 19:03:43	Notice (6)	TLV-11 - unrecognized OID;CM-MAC=;CMTS-MAC=;CM-QOS=1.1;CM-VER=3.0;
2020-6-14, 19:03:46	Error (4)	Improper Configuration File CVC Format

Any help appreciated. Thanks in advance

1 Reply

  • FURRYe38's avatar
    FURRYe38
    Guru - Experienced User
    Jun 15, 2020

    Have the ISP check the signal and line quality UP to the modem. 

    Have the ISP re-associate the modem and send there config and FW files. 
    Be sure there are no coax cable line splitters in the between the modem and ISP service box. 
    Be sure your using good quality RG6 coax cable up to the modem. 
    Be sure to power OFF the modem for 1 minute them back ON.