This parameter defines the IA Valid Lifetime, in seconds, utilized by CDRouter’s DHCPv6 server on the WAN. CDRouter’s DHCPv6 server will provide this Valid Lifetime to the DUT’s DHCPv6 client on the WAN. To return an infinite Valid Lifetime to the WAN client, a value of infinite may be specified. If an infinite lifetime is used, all tests that require the WAN client to renew or rebind will be skipped. Note that the Valid Lifetime must be greater than or equal to the Preferred Lifetime.