[edit]
root@ISP-1-R1# show
## Last changed: 2018-04-11 07:49:32 UTC
version 14.1R1.10;
system {
    host-name ISP-1-R1;
    root-authentication {
        encrypted-password "$1$jN9xg82/$gUal2CRqIlldjMNTNYD/N/"; ## SECRET-DATA
    }
    syslog {
        user * {
            any emergency;
        }
        file messages {
            any notice;
            authorization info;
        }
        file interactive-commands {
            interactive-commands any;
        }
    }
}
interfaces {
    em2 {
        description "ISP-1-R1 to ISP-2-R1";
        unit 0 {
            family inet {
                address 30.30.30.9/30;
            }
        }
    }
    em3 {
        description "ISP-1-R1 to Customer A";
        unit 0 {
            family inet {
                address 30.30.30.13/30;
            }
        }
    }
    em4 {
        description "ISP-1-R1 to ISP-1-R2";
        unit 0 {
            family inet {
                address 50.50.50.2/30;
            }
        }
    }
    em5 {
        description "ISP-1-R1 to Edge-1";
        unit 0 {
            family inet {
                address 30.30.30.1/30;
            }
        }
    }
    lo0 {
        description Loopback;
        unit 0 {
            family inet {
                address 10.10.10.1/32;
            }
        }
    }
}
routing-options {
    static {
        route 0.0.0.0/0 discard;
        route 30.30.30.0/24 discard;
        route 50.50.50.0/24 discard;
    }
    router-id 10.10.10.1;
    autonomous-system 100;
}
protocols {
    bgp {
        group IBGP-PEERS {
            type internal;
            local-address 10.10.10.1;
            export STATIC;
            neighbor 10.10.10.2;
        }
        group enterprise-edge1 {
            type external;
            export BGP-ENTERPRISE-OUT;
            peer-as 10;
            neighbor 30.30.30.2;
        }
        group EBGP-PEER {
            type external;
            export BGP-ISP2-OUT;
            peer-as 200;
            neighbor 30.30.30.10;
        }
        group CUSTOMER-PEER {
            type external;
            import BGP-CUSTOMER-A-IN;
            export STATIC;
            peer-as 300;
            neighbor 30.30.30.14;
        }
    }
    ospf {
        area 0.0.0.0 {
            interface em4.0 {
                interface-type p2p;
            }
            interface lo0.0 {
                passive;
            }
            interface em5.0 {
                passive;
            }
            interface em2.0 {
                passive;
            }
            interface em3.0 {
                passive;
            }
        }
    }
}
policy-options {
    policy-statement BGP-CUSTOMER-A-IN {
        term ACCEPT {
            then {
                community add CUSTOMER_A_MARK;
                accept;
            }
        }
    }
    policy-statement BGP-ENTERPRISE-OUT {
        term DEFAULT {
            from {
                route-filter 0.0.0.0/0 exact;
            }
            then accept;
        }
        term ACCEPT {
            from community [ CUSTOMER_A_MARK CUSTOMER_B_MARK ];
            then accept;
        }
        term OTHER {
            then reject;
        }
    }
    policy-statement BGP-ISP2-OUT {
        term CUSTOMERS {
            from community CUSTOMER_A_MARK;
            then accept;
        }
        term AGGREGATES {
            from {
                route-filter 30.30.30.0/24 exact;
                route-filter 50.50.50.0/24 exact;
            }
            then accept;
        }
        term OTHER {
            then reject;
        }
    }
    policy-statement STATIC {
        term DEFAULT {
            from {
                route-filter 0.0.0.0/0 exact;
            }
            then accept;
        }
    }
    community CUSTOMER_A_MARK members 300:100;
    community CUSTOMER_B_MARK members 400:200;
}

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root@ISP-1-R1#