Cannot connect my Netgear EAX12 extender to my Netgear RAX10 router.

And?

 

Blank messages are always a bad sign. There isn't enough room to cram everything into the subject.

 

What are you doing and what goes wrong?

 

You can help people to help you by providing the information suggested in this forum's header:

 

Subject (Include model number and brief summary)
Model (Recommended - Helps the community give the best answers)
Body (Include additional detail including model version, firmware, OS and environment where relevant.)

They are there for a good reason.

 

Manuals are always a good place to start.

Visit the support pages:

Support | NETGEAR

Feed in your model number and check the documentation for your hardware.

Begin with the Quick Start/Installation Guide.