1 RTN_UNSPEC 0 2 RTN_UNICAST 1 3 RTN_LOCAL 2 4 RTN_BROADCAST 3 5 RTN_ANYCAST 4 6 RTN_MULTICAST 5 7 RTN_BLACKHOLE 6 8 RTN_UNREACHABLE 7 9 RTN_PROHIBIT 8 10 RTN_THROW 9 11 RTN_NAT 10 12 RTN_XRESOLVE 11 13