firewall {

    family vpls {

        filter CONTROL-FLOODING {

            term STP {

                from {

                    destination-mac-address {

                        01:80:c2:00:00:00/48;

                    }

                }

                then {

                    count STP;

                    discard;

                }

            }

            term ALTERNATE-STP {

                from {

                    destination-mac-address {

                        01:80:c2:00:00:00/44;

                    }

                }

                then {

                    count ALTERNATE-STP;

                    discard;

                }

            }

            term PVST {

                from {

                    destination-mac-address {

                        01:00:0c:cc:cc:cd/48;

                    }

                }

                then {

                    count PVST;

                    discard;

                }
 

            }

            term CDP {

                from {

                    destination-mac-address {

                        01:00:0c:cc:cc:cc/48;

                    }

                }

                then {

                    count CDP;

                    discard;

                }

            }

            term VLAN-BRIDGE {

                from {

                    destination-mac-address {

                        01:00:0c:cd:cd:ce/48;

                    }

                }

                then {

                    count VLAN-BRIDGE;

                    discard;

                }

            }

            term STP_UPFAST {

                from {

                    destination-mac-address {

                        01:00:0c:cd:cd:cd/48;

                    }

                }

                then {

                    count STP_UPFAST;

                    discard;

                }

            }

            term DEFAULT {

                then accept;

            }

        }

    }              

}

 

 

And apply it under routing-instance:

routing-instances {

    L2VPLS512 {

        instance-type vpls;

        forwarding-options {

            family vpls {

                flood {

                    input CONTROL-FLOODING;

                }

            }

        }

        protocols {

            vpls {

                site-range 4;

                site router1 {

                    site-identifier 1;

                    multi-homing;

                    site-preference primary;

                    interface ae0.512;

                }

            }

        }

    }