+ <tag><label id="radv-iface-route-lifetime">route lifetime <m/expr/ [sensitive <m/switch/]</tag>
+ This option specifies the default value of advertised lifetime for
+ specific routes; i.e., the time (in seconds) for how long (since the
+ receipt of RA) hosts should consider these routes valid. A special value
+ 0xffffffff represents infinity. The lifetime can be overriden on a per
+ route basis by the <ref id="rta-ra-lifetime" name="ra_lifetime"> route
+ attribute. Default: 3 * <cf/max ra interval/, <cf/sensitive/ no.
+
+ For the <cf/sensitive/ option, see <ref id="radv-trigger" name="trigger">.
+ If <cf/sensitive/ is enabled, even the routes with the <cf/ra_lifetime/
+ attribute become sensitive to the trigger.
+
+ <tag><label id="radv-iface-route-preference">route preference low|medium|high</tag>
+ This option specifies the default value of advertised route preference
+ for specific routes. The value can be overriden on a per route basis by
+ the <ref id="rta-ra-preference" name="ra_preference"> route attribute.
+ Default: medium.
+
+ <tag><label id="radv-prefix-linger-time">prefix linger time <m/expr/</tag>
+ When a prefix or a route disappears, it is advertised for some time with
+ zero lifetime, to inform clients it is no longer valid. This option
+ specifies the time (in seconds) for how long prefixes are advertised
+ that way. Default: 3 * <cf/max ra interval/.
+
+ <tag><label id="radv-route-linger-time">route linger time <m/expr/</tag>
+ When a prefix or a route disappears, it is advertised for some time with
+ zero lifetime, to inform clients it is no longer valid. This option
+ specifies the time (in seconds) for how long routes are advertised
+ that way. Default: 3 * <cf/max ra interval/.
+