During the period, Client has more status. The beginning of the period, Client has a status of connected (bound). At T1, the Client switches to extended status (renewal) and send a unicast DHCP Request to the DHCP Server to request to extend the time for the IP address lease. If the DHCP SERVER with DHCP ACK reply, the Client returns the connection status (bound). Conversely, the Client will try to send a DHCP Request after about half the time remaining time until T2 time 60 seconds. If the Client still cannot get DHCP ACK before T2 to, Client connection status switch back (rebinding).In the connection status (rebinding), Client will promote a DHCP Request to renew the IP address lease time. If DHCP ACK was received, the Client returns the connection status (bound). Conversely, the Client will try to send a DHCP Request after half the period of time remaining until expiration of the LT.
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