Allows for the renewal of DHCP leases. When assigned an IP address via DHCP, ethernet devices are given a lease on the address for an amount of time. With Ethernet.maintain(), it is possible to request a renewal from the DHCP server. Depending on the server's configuration, you may receive the same address, a new one, or none at all.
Ethernet.maintain() was added to Arduino 1.0.1.
Ethernet.maintain();
none
byte: 0: nothing happened 1: renew failed 2: renew success 3: rebind fail 4: rebind success