my modem randomly restarts itself

[muscleman]

Time Priority Code Description
1970-01-01 00:00:17 Critical D003.0 DHCP WARNING - Non-critical field invalid in response.
1970-01-01 00:00:05 Notice M571.1 Ethernet link up - ready to pass packets
1970-01-01 00:01:18 Notice M573.0 Modem Is Shutting Down and Rebooting...
1970-01-01 00:01:18 Critical R004.0 Received Response to Broadcast Maintenance Request, But no Unicast Maintenance o
1970-01-01 00:00:11 Critical R005.0 Started Unicast Maintenance Ranging - No Response received - T3 time-out
1970-01-01 00:00:09 Critical R002.0 No Ranging Response received - T3 time-out (US 6)
1970-01-01 00:00:19 Critical D003.0 DHCP WARNING - Non-critical field invalid in response.
1970-01-01 00:00:05 Notice M571.1 Ethernet link up - ready to pass packets
1970-01-01 00:01:19 Notice M573.0 Modem Is Shutting Down and Rebooting...