PPPoE Relay help

hi

i need to use a pppoe relay on my lede router vdsl to attach another router that has a configured VoIP service. This VoIP service is configured to do a personal connection to my isp using a pppoe, so i need to make the lede router to do the pppoe relay service.

I tried installig relayd, creating a new relay interface between lan and ptm interfaces, but a simple connection using my pc windows pppoe-passthrough always does an error.

i'm sure i'm making something wrong, can you help me?
thanks

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