The following table describes the Flags column in the netstat -rn output.
| Flag | Description |
|---|---|
| U | Up—Route is valid |
| G | Gateway—Route is to a gateway router rather than to a directly connected network or host |
| H | Host name—Route is to a host rather than to a network, where the destination address is a complete address |
| R | Reject—Set by ARP when an entry expires (for example, the IP address could not be resolved into a MAC address) |
| D | Dynamic—Route added by a route redirect or RIP (if routed is enabled). |
| M | Modified—Route modified by a route redirect |
| C | Cloning—A new route is cloned from this entry when it is used |
| L | Link—Link-level information, such as the Ethernet MAC address, is present |
| S | Static—Route added with the route command |