1This matches the routing realm.  Routing realms are used in complex routing
2setups involving dynamic routing protocols like BGP.
3.TP
4[\fB!\fP] \fB\-\-realm\fP \fIvalue\fP[\fB/\fP\fImask\fP]
5Matches a given realm number (and optionally mask). If not a number, value
6can be a named realm from /etc/iproute2/rt_realms (mask can not be used in
7that case).
8