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Installation and Operation Manual
ECN: 003155
Date: 06/4/2013
30
AC-SmartStart-7608-Series_IOM Rev 04
LAN Module & Communications
7.2 LAN Module IP Address and DHCP
The unit is capable of getting an IP address via DHCP provided a DHCP server exists
on the network and the IP address is set to 0.0.0.0. Upon power up of the PDU, if the IP
address is set to 0.0.0.0, a DHCP server on the network will supply the LAN module with
an IP address gateway address, and subnet mask. If no DHCP server exists, the LAN
module red diagnostic LED will blink continuously and the screen status LED will blink five
times. Please consult with the factory if IP configuration is needed when using DHCP.
Please make sure that the IP address that is given to the PDU is recorded so that LAN
connections can be made and the commands intended for the unit are received.
7.3 LAN Module IP Address and AutoIP
To enable AutoIP, the IP address must be set to 0.0.0.0. AutoIP allows the unit to obtain
an address in a network that does not have a DHCP server. AutoIP assigns a random
valid address to the LAN module in the range of 169.254.x.1 to 169.254.x.1 where x is
between 0 and 255. This range of IP addresses is not to be used over the internet. If a
LAN module has not been configured manually and cannot find a DHCP server, it auto-
matically chooses an address from the reserved range. The LAN module then uses the
Address Resolution Protocol (ARP) to send out a request asking if any other node is using
that same address. If another node using the same address is found, the LAN module will
assign another IP address, reboot, and repeat the sequence.
The purpose of AutoIP is to allow a small network of AutoIP enabled devices to be set up
without any need for a DHCP server. AutoIP can be disabled by setting the IP address to
0.0.1.0.
7.4 LAN Module IP Address and ARP
If a link can be established on a network but the user cannot ping the IP address of the
unit, it may be necessary to re-configure the IP address using the MAC address. The
MAC address is a unique serial number given to every device that could be connected
to a LAN. The MAC address is on a label on the top of the unit. If the label has been
removed, please contact your IP department for additional help in identifying MAC ad-
dresses or IP addresses trying to connect to the network. There are software packages
that can scan a network for all devices connected, then the PDU can be connected and
the software will show the attributes of the newly connected device. From this informa-
tion, you will be able re-define the IP address and netmask of the PDU to the necessary
settings for the application.
The ARP method is available under Windows-based systems. The LAN module will set
its address from the first directed TCP/IP packet it receives. The MAC address of the LAN
module that is being changed is needed.