How to read FIOS internet router logs?

[lyolik]

My FIOS internet router keeps cycling (restarts every couple of minutes).  Resetting ONT and router sometimes helps.  Verizon came out multiple times and couldn't find any problems, but replaced ONT and router.  I would like to examine the router logs to get a count of how many times the router cycles/goes off-line, as well as any additional information that could be helpful to pinpoint what the issue is.