interfaces {
    fe-0/0/5 {
        unit 0 {
            encapsulation ppp-over-ether;
        }
    }
    pp0 {
        unit 0 {
            ppp-options {
                pap {
                    access-profile ppp-profile;
                    local-password "dkwoxslxqpz";##SECRET-DATA
                    local-name "username";
                    passive;           ##被動模式
                }
            }
            pppoe-options {
                underlying-interface fe-0/0/5.0; 選擇介面
                auto-reconnect 10;      ##自動重連
                client;
                idle-timeout 0;             ##空閒超時時間為0，就直接重新撥號
            }
            family inet {
                negotiate-address;
                mtu 1492;         ##根據當地情況來設定MTU，可以不用設定
            }
        }
    }
}    

#################################

set interfaces fe-0/0/0 unit 0 encapsulation ppp-over-ether

set interfaces pp0 unit 0 ppp-options chap local-name 480000048023 這個名字要和下面的保持一致（撥號的賬號）
set interfaces pp0 unit 0 ppp-options chap no-rfc2486
set interfaces pp0 unit 0 ppp-options chap passive
set interfaces pp0 unit 0 ppp-options pap local-name 480000048023
set interfaces pp0 unit 0 ppp-options pap no-rfc2486
set interfaces pp0 unit 0 ppp-options pap local-password "$9$nrOoCORevWx7VrlJDHkPfIEcl8X"
set interfaces pp0 unit 0 ppp-options pap passive
set interfaces pp0 unit 0 pppoe-options underlying-interface fe-0/0/0.0
set interfaces pp0 unit 0 pppoe-options idle-timeout 0
set interfaces pp0 unit 0 pppoe-options auto-reconnect 3
set interfaces pp0 unit 0 pppoe-options client
set interfaces pp0 unit 0 family inet negotiate-address