| This matches the routing realm. Routing realms are used in complex routing | |
| setups involving dynamic routing protocols like BGP. | |
| .TP | |
| [\fB!\fP] \fB--realm\fP \fIvalue\fP[\fB/\fP\fImask\fP] | |
| Matches a given realm number (and optionally mask). If not a number, value | |
| can be a named realm from /etc/iproute2/rt_realms (mask can not be used in | |
| that case). |