Hello  @Marvin_S ,

The Service Name is mandatory hence I'm compelled to use the advanced settings. However as mentioned above Access Concentrator Name has to be left blank.

These are the instructions/configuration specs from my ISP and it his how the modem from ISP is also working with PPoE settings on it.

please advice if there are other ways to achieve this?

thanks.

  @Marvin_S 

Hi, I have indeed tried all permutations and combinations and have reached out hear as the PPPoE link is not establishing.

The modem that my ISP provided allows for a blank and hence seems to work seamlessly.

Looks like the Deco software needs an update.

Thanks @Marvin_S & @David-TP for your responses.

unfortunately it's too simple for a video, it basically is just feeding in to Deco's internet connections page a PPPoE username & a password. In addition to which the Service name and Access Concentrator name under the advance page. See screenshots:

The BSNL-FTTH didn't have any success :(. 
yes the ISP is BSNL.

P.S: also tried MAC address cloning and setting up VLAN settings from the syrotech. Of course I did manage to put the Syrotech modem in bridge mode to get this to work.

Syrotech model SY-GPON-2010-WADONT and config page screenshot with original settings prior to bridge :

 😁 Just updated the screenshot description in my last post @klipse.
The goal is to enable PPPoE on Deco and drop the management from ISP router.

True and the existing setup already works that way with routing mode+Deco as AP.

So I am convinced that the Access Concentrator Name cannot be 'Required' but 'Optional'.