@alistairts Just an update on my situation. TP-link created a beta firmware update just for me to set my MTU at 1440. The update is working 100%, I only hope they release an official firmware update...

When will the MTU setting be added to the Deco configuration? My ISP uses an MTU of 1440, therefore I am forced to use a second router between my ONT and Deco P9 with the sole purpose of setting the...