Please advise what I am doing wrong because connection has been buggy with P9 no matter which modem I am using. I am with PlusNet VDSL

Currently I entered Plusnet details in Archer VR600 > set Bridge Mode > put in PlusNet details in P9 as well. P9 simply not connecting to internet. 

Question:

1- Should I still be entering PlusNet VDSL details in Archer?

2- Other than setting Archer in Bridge Mode, anything else I should do to connect P9 with Archer properly?

3- Am I supposed to assign static IP for P9 in Archer?

Would like to make it work with P9 in Router Mode instead of Access Mode.

Thanks