Hi Meriadoc, If your DSL modem try to re-syncs, the DSL modem will lost internet, since the router get internet from the DSL modem, the only way to forbidden that happen is to get a DSL modem which...

only Ipaid have this issue? How about your other devices?

Hi， TP-Link will relese new firmware in the near future and will forbeiden to ping the public IP address in default mode. Please pay attention to the our updates on official website. Thanks

About the automation, I found a FAQ, it might be helpful https://www.tp-link.com/us/faq-1901.html

Hi Lerenzo, for this case, please check what's the topology of your netowrk? How did you establish the netowrk in your situation, just simple like from modem to Deco and the other deco is wireles...

Hi yes,all the deco can be work together , so it's not a problem for P7 and Deco M9 to work together