[j-nsp] Filter-based forwarding query

[Dave O' Meara]

Hi there,

I need to over-ride regular routing for three specific subnets, using
filter-based forwarding. Instead of these subnets routing to the
internet, I need to intercept packets destined for these subnets and
route them out of a directly-connected interface. I understand that I
need to create a new routing instance, but how do I keep this new
routing table minimal i.e. just directly-connected routes?  

Should the config below work?

Thanks,
Dave



interfaces {
    fe-0/0/1 {
        unit 0 {
            family inet {
                no-redirects;
                filter {
                    input policy_route;
                }
                address a.b.c.d/30;
            
            }
        }
    }
}

firewall {
    filter policy_route {
        term intercept {
            from {
                destination-address {
                    e.f.g.0/24;
                    e.f.h.0/24;
                    e.f.j.0/24;
                }
            }
            then {
                routing-instance policy-route-table;
            }
        term default {
            then accept;
        }
    }
}

 
routing-instances {
    policy-route-table {
        instance-type forwarding;
        routing-options {
            static {
                route e.f.g.0/24 next-hop 10.1.1.2;
                route e.f.h.0/24 next-hop 10.1.1.2;
                route e.f.j.0/24 next-hop 10.1.1.2;            }
        }
    }
}

routing-options {
    interface-routes {
        rib-group inet policy-route-group;
    }
    rib-groups {
        policy-route-group {
            import-rib policy-route-table.inet.0;
        }
    }
}