Hi @Bean.Wang-Q
EC20 able to give DNS to host with pppd on IPCP negotiation,
EC200U is not able to give DNS to host with pppd on IPCP negotiation,
More over google IPV6 DNS 2001:4860:4860::8888、2001:4860:4860::8844 is not solving the problem, but if I use 2405:200:800::11 which is provided by Operator , im able to ping domains.
This will resolve if EC200U able to give DNS to host during IPCP negotiation, like EC20
Thanks