I'm testing DHCPv6 client. One of the tasks I need to check is if the CONFIRM message is sent as described in RFC (if it occurs in specified timeout). I know that this message is sent to be sure if it is still appropriate on given link.
I'd like to ask how to enforce sending such CONFIRM message by DHCPv6 client? I tried to ifconfig ethX down/up but it didn't cause any DHCPv6 activity.