Moxa Technologies 5250 User Manual

Page of 108
NPort IA5150/5250 Series User’s Manual 
Web Console Configuration 
 
5-7
You must assign a valid IP address to NPort IA5150/5250 before it will work in your network 
environment. Your network system administrator should provide you with an IP address and 
related settings for your network. The IP address must be unique within the network (otherwise, 
NPort IA5150/5250 will not have a valid connection to the network). First time users can refer to 
Chapter 3, “Initial IP Address Configuration,” for more information. 
You can choose from four possible “IP configuration” modes—StaticDHCPDHCP/BOOTP
and BOOTP—located under the web console screen’s IP configuration drop-down box. 
Method 
Function Definition 
Static 
User defined IP address, Netmask, Gateway. 
DHCP 
DHCP Server assigned IP address, Netmask, Gateway, DNS, and Time 
Server 
DHCP/BOOTP  DHCP Server assigned IP address, Netmask, Gateway, DNS, and Time 
Server, or BOOTP Server assigned IP address (if the DHCP Server does not 
respond) 
BOOTP 
BOOTP Server assigns IP address 
IP Address 
Setting 
Factory Default 
Necessity 
E.g., 192.168.1.1 
(IP addresses of the form x.x.x.0 and 
x.x.x.255 are invalid.) 
192.168.127.254 Required 
An IP address is a number assigned to a network device (such as a computer) as a permanent 
address on the network. Computers use the IP address to identify and talk to each other over the 
network. Choose a proper IP address that is unique and valid in your network environment. 
Netmask 
Setting 
Factory Default 
Necessity 
E.g., 255.255.255.0 
255.255.255.0 
Required 
A subnet mask represents all of the network hosts at one geographic location, in one building, or 
on the same local area network. When a packet is sent out over the network, the NPort 
IA5150/5250 will use the subnet mask to check whether the desired TCP/IP host specified in the 
packet is on the local network segment. If the address is on the same network segment as the 
NPort IA5150/5250, a connection is established directly from the NPort IA5150/5250. Otherwise, 
the connection is established through the given default gateway. 
Gateway 
Setting 
Factory Default 
Necessity 
E.g., 192.168.1.1 
None 
Optional 
A gateway is a network gateway that acts as an entrance to another network. Usually, the 
computers that control traffic within the network or at the local Internet service provider are 
gateway nodes. NPort IA5150/5250 needs to know the IP address of the default gateway computer 
in order to communicate with the hosts outside the local network environment. For correct 
gateway IP address information, consult the network administrator.