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AT-IFS802SP/POE(W)-80 User Manual
6.6  DHCP Server
DHCP is the abbreviation of Dynamic Host Configuration Protocol that is a protocol for assigning
dynamic IP addresses to devices on a network. With dynamic addressing, a device can have a different 
IP address every time it connects to the network. In some systems, the device’s IP address can even 
change while it is still connected. DHCP also supports a mix of static and dynamic IP addresses. Dynamic 
addressing simplifies network administration because the software keeps track of IP addresses rather
than requiring an administrator to manage the task. This means that a new computer can be added to 
a network without the hassle of manually assigning it a unique IP address.
The system provides the DHCP server function. Having enabled the DHCP server function, the switch 
system will be configured as a DHCP server.
6.6.1 System configuration
DHCP Server
: Enable or Disable the DHCP Server function. Enable—the switch will be the 
DHCP server on your local network.
Low IP Address
: Type in an IP address. Low IP address is the beginning of the dynamic IP range. 
For  example,  dynamic  IP  is  in  the  range  between  192.168.1.100  ~  192.168.1.200.  In  contrast, 
192.168.1.100 is the Low IP address.
High  IP Address
: Type  in  an  IP  address.  High  IP  address  is  the  end  of  the  dynamic  IP  range. 
For  example,  dynamic  IP  is  in  the  range  between  192.168.1.100  ~  192.168.1.200.  In  contrast, 
192.168.1.200 is the High IP address.
Subnet Mask
: Type in the subnet mask of the IP configuration.
Gateway
: Type in the IP address of the gateway in your network.
DNS
: Type in the Domain Name Server IP Address in your network.
Lease Time (sec)
:  It  is  the  time  period  that  system  will  reset  the  dynamic  IP  assignment  to 
ensure the dynamic IP will not been occupied for a long time or the server doesn’t know that the 
dynamic IP is idle.
And then, click 
Apply
DHCP Server Configuration interface