@Jopie152 Deco X60 is capable of much more than 300Mbps. You tried multiple things, but let's try some of them in an organized order. 1. Please share your Deco mesh network diagram in Map and in List...

@DennisBadKnee With Deco running in access point mode IP address reservation is done on your DSL modem/router. Check its documentation or ask ISP Tech Support to help you with that.

@decom9b Would be very helpful if you could make screenshots from your Deco app for Show List and Show Map, and attach them to your reply. Examples: ------------

@rob5 It is recommended to turn off router WiFi network, leaving just Deco to provide WiFi coverage.

@hot-brush These logs are not very helpful. "We have many devices running on this network." - How many, approximately? Would be helpful if you could make screenshot of Deco app screen for Show List...

@KuroYami This is truly strange for router to miss such basic functionality. Can you share brand name and model number of your ISP Router? Also, while it is really what I don't want to recommend, but...