Hi all 

I have an existing router at home which gives 300mbps speed and then I have purchased deco e4 and completed the setup for 3 of them 

but deco is not able to replicate the speed of 300mbps 

One deco is connected to router with LAN and other two and just replicating 

do I need to do something different to get the speed replicated ? 
should I use acces point or extender for the main deco ?

regards

neeraj