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). 8Both value and mask are four byte unsigned integers and may be specified in 9decimal, hex (by prefixing with "0x") or octal (if a leading zero is given). 10