TpLink C7 V4 rp-pppoe-relay Unable to start

SNAPSHOT r7194-5e9470a
kernel 4.9.107

root@OpenWrt:/tmp/tmp# opkg install
Package rp-pppoe-relay (3.11-1) installed in root is up to date.

root@OpenWrt:/tmp/tmp# pppoe-relay -S eth1 -C br-lan
-ash: pppoe-relay: not found

How to fix it ?

You really must use a current binary, one built with the snapshot you're running - especially when the underlying libc has been switched from uclibc to musl.

Thank you for your reply, but I can't find the corresponding installation package. Can you tell me to download it?