American Fibertek Commander C10e/C10e-I/C10p/C10p-I - Manual (Page 21)

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Recovering IP Address when DHCP Is Used
Commander has the ability to be programmed with a fixed IP address and operate in systems
using DHCP. In the latter case Commander’s IP address will change according to the IP address
assigned to it by that system’s DHCP server. In order to inform the operator of any such change
in its IP address, Commander will send the new IP to the email address programmed in the Global
Settings.
Please note: The programming of Global Settings is restricted to the Master Admin.
DHCP notification: Commander provides programmable email notification of any IP address
changes. Also, ARP packet with IP and MAC address sent once every minute, may be detected
by using standard freeware such as Wireshark or TCPDUMP. Both methods keep you up to date
on Commanders using DHCP without the need to remove from system or complex external
connections.