IP Router Configuration Command Reference
228 Router Configuration Guide
preferred-lifetime
Syntax [no] preferred-lifetime {seconds | infinite}
Context config>router>router-advert>if
Description This command configures the remaining length of time in seconds that this prefix will continue to be
preferred, such as, time until deprecation. The address generated from a deprecated prefix should not
be used as a source address in new communications, but packets received on such an interface are
processed as expected.
Default 604800
Parameters seconds — Specifies the remaining length of time in seconds that this prefix will continue to be
preferred.
infinite — Specifies that the prefix will always be preferred. A value of 4,294,967,295 represents
infinity.
valid-lifetime
Syntax valid-lifetime {seconds | infinite}
Context config>router>router-advert>if
Description This command specifies the length of time in seconds that the prefix is valid for the purpose of on-link
determination. A value of all one bits (0xffffffff) represents infinity.
The address generated from an invalidated prefix should not appear as the destination or source address
of a packet.
Default 2592000
Parameters seconds — Specifies the remaining length of time in seconds that this prefix will continue to be
valid.
infinite — Specifies that the prefix will always be valid. A value of 4,294,967,295 represents
infinity.
reachable-time
Syntax reachable-time milli-seconds
no reachable-time
Context config>router>router-advert>if
Description This command configures how long this router should be considered reachable by other nodes on the
link after receiving a reachability confirmation.
Default no reachable-time
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