IPv6 Configuration Guide K/KA/KB.15.15

Options for valid-lifetime preferred-lifetime:
Time in seconds:
[ 0 - 4294967295 | 0 - 4294967295 ]
Specific date and time
[ valid-lifetime preferred-lifetime ]
valid-lifetime-MM/DD/YY
valid-lifetime-HH:MM:SS
preferred-lifetime-MM/DD/YY
preferred-lifetime-HH:MM:SS
at valid-date preferred-date
valid-date - MM/DD/[YY]YY]
valid-date - HH:MM[:SS}
preferred-date - MM/DD/[YY]YY
preferred-date - HH:MM[:SS}
VLAN or tunnel context command for specifying prefixes for the routing switch to
include in RAs transmitted on the VLAN or tunnel. IPv6 hosts use the prefixes in RAs
to autoconfigure themselves with global unicast addresses. A host’s autoconfigured
address is composed of the advertised prefix and the interface identifier in the host’s
current link-local address.
valid-lifetime
The total time the prefix remains available before becoming unusable. After
preferred-lifetime expiration, any autoconfigured address is deprecated and
used only for transactions that began before the preferred-lifetime expired. If
the valid lifetime also expires, the address becomes unusable.
Default: 2,592,000 seconds - 30 days; Range: 0 - 4294967295
seconds
preferred-lifetime
The span of time during which the address can be freely used as a source and
destination for traffic. This setting must be less than or equal to the corresponding
valid-lifetime setting.
Default: 604,000 second – 7 days; Range: 0 - 4294967295 seconds
NOTE: The valid and preferred lifetimes designated in this command are
fixed values. Each successive transmission of the same RA contains the same
valid and preferred lifetimes.
For more information on valid and preferred lifetimes, see “Address lifetimes”
(page 28).
default
Applied to all on-link prefixes that are not individually set by theipv6 ra
prefix ipv6-prefix/prefix-len command. It applies the same valid
and preferred lifetimes, link state, autoconfiguration state, and advertise options
to the advertisements sent for all on-link prefixes that are not individually
configured with a unique lifetime. This also applies to the prefixes for any global
unicast addresses configured later on the same VLAN or tunnel.
Using default once, and then using it again with any new values results in
the new values replacing the former values in advertisements.
190 IPv6 Router Advertisements