Permite colocar ip dentro da bridge para pingar 

set interfaces irb unit 1200 family inet address 192.168.1.1/30  criar a interface fora da routing instance 

set routing-instances TESTE instance-type virtual-switch

set routing-instances TESTE bridge-domains TESTE-DOMINIO vlan-id 1200

set routing-instances TESTE bridge-domains TESTE-DOMINIO interface ge-0/0/2.0

set routing-instances TESTE bridge-domains TESTE-DOMINIO interface ge-0/0/2.1200

set routing-instances TESTE bridge-domains TESTE-DOMINIO interface ge-0/0/3.1200

set routing-instances TESTE bridge-domains TESTE-DOMINIO routing-interface irb.1200 adicionar dentro da routing instance

set bridge-domains TESTE-DOMINIO domain-type bridge

}

interfaces {

    ge-0/0/2 {

        flexible-vlan-tagging;

        encapsulation flexible-ethernet-services;

        unit 1200 {

            description "circuito de teste";

            encapsulation vlan-bridge;

            vlan-id 1200;

        }

    }

    ge-0/0/3 {

        flexible-vlan-tagging;

        encapsulation flexible-ethernet-services;

        unit 1200 {

            description "circuito de test";

            encapsulation vlan-bridge;

            vlan-id 1200;

        }

    }

    em0 {

        unit 0 {

            family inet {

                address 192.168.56.10/24;

            }

        }

    }

    irb {

        unit 1200 {

            family inet {

                address 192.168.1.1/30;

            }

        }

    }

}

routing-instances {

    TESTE {

        instance-type virtual-switch;

        bridge-domains {

            TESTE-DOMINIO {

                vlan-id 1200;

                interface ge-0/0/2.0; ## 'ge-0/0/2.0' is not defined

                interface ge-0/0/2.1200;

                interface ge-0/0/3.1200;

                routing-interface irb.1200;

            }

        }

    }

}

bridge-domains {

    TESTE-DOMINIO {

        domain-type bridge;

    }

}