AC1200 (model C6220) Does this device log IP address conflicts?

[LogWatcher]

I'm helping a friend troubleshoot a problem with his AC1200 (model C6220) cable modem.  I suspect there is a periodic IP address conflict but it's difficult to talk a non-techie person trough troubleshooting over the phone.  I thought that since that cable modem does log some events, it might log a detected IP address conflict.  Anybody know if this is the case?  If that device does indeed log such events then I will try to talk the user through logging in to the modem's web interface and checking the logs.  If not, I won't bother trying to talk the used through this.

[antinode]

> [...] I suspect there is a periodic IP address conflict [...]

   Any evidence for that?  ("periodic" or "occasional"?)

> [...] it might log a detected IP address conflict. [...]

   I'd expect to find evidence in the log of the DHCP server granting an
address to a client device.  I wouldn't bet that the router would notice
a conflict, let alone record it in its log.

   In my experience, the usual cause of an address conflict is the
presence of multiple DHCP servers on the LAN.  Less frequently, a user
will assign a static address (not a reserved dynamic address) to some
device, but leave that address in the DHCP pool, so that the DHCP server
can grant it to some other device.

[LogWatcher]

Actually, the cable morem/router is the DHCP server.  I found no information about what types of events the device logs.  Maybe I'll have to open a ticket with Netfear support.