Listing 1 Sample Juniper filter-based forwarding configuration routing options

{
    interface-routes {
        rib-group all-ribs;
    }
    rib-groups {
       all-ribs { 
            import-rib [ inet.0 ISP1.inet.0 ISP2.inet.0];
        }
     }
}
routing-instances {
    ISP1 {
        instance-type forwarding;
        routing-options {
            static {
                route 0.0.0.0/0 next-hop 1.1.1.2;
            }
        }
    }
    ISP2 {
        instance-type forwarding;
        routing-options {
            static {
                route 0.0.0.0/0 next-hop 2.2.2.2;
            }
        }
    }
}
firewall {
      family inet {
            filter alpine {
                 term ISP1 {
                       from {
                            source-address 5.5.5.5/32;
                       }
                       then {
                            routing-instance ISP1;
                     }
             }
             term ISP2 {
                    from {
                           source-address 5.5.5.6/32;
                    }
                    then {
                           routing-instance ISP2;
                    }
             }
             term default-accept {
                   then {
                        accept;
                  }
            }
      }
}
interface {
      fe-0/0/0 {
           family {
                 inet {
                        filter {
                              input alpine;
                        }
                        address 5.5.5.3/24;
                  }
            }
      }