This document describes a Dynamic Host Configuration Protocol for IPv6
(DHCPv6) option for specifying an upper bound
for how long a client should wait before refreshing information
retrieved from DHCPv6. It is used with stateless DHCPv6 as there are
no addresses or other entities with lifetimes that can tell the
client when to contact the DHCPv6 server to refresh its
configuration. [STANDARDS-TRACK]