@TX2
Hello,
May I know who is your ISP? What is the network bandwidth provided by your ISP?
When the internet drops on the C60, does it show the WAN port unplugged or any error on its web interface status page? Is the Internet LED orange or green?
Ensure the cable between the C60 and your ISP modem is good, try with another cat5e or cat6 cable if necessary. Do you mean the connection will recover automatically without doing anything?
Please reset the C60 first and then log into its web interface, confirm if there is a status for the Internet Negotiation speed:
https://www.tp-link.com/support/faq/2472/
Try to change it to 100Mbps Full Duplex or 1000Mbps Full Duplex on System Tool-System Parameters to give it a go.
If this makes no difference, please send us the whole system log on the C60 showing this connect-disconnect-connect issue, thanks.