SENA LS110 - Manual (Page 22)

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client computer receives this information when the IP address is provided at its boot-up.
To obtain an IP address, the LS110 sends a corresponding DHCP request as a broadcast over the
network after each reset. The reply generated by the DHCP server contains the IP address as well as
the subnet mask, gateway address, DNS servers and the lease time. The LS110 immediately places
this information in its non-volatile memory. If the operating time reaches the lease time, the LS110 will
request the DHCP server for a renewal of its lease time. If the DHCP server approves extending the
lease, the LS110 can continue to work with the current IP address. Otherwise, the LS110 will start the
procedure to request a new IP address to the DHCP server.
A DHCP sever assigns IP addresses dynamically from an IP address pool, which is managed by the
network administrator. This means DHCP client, i.e. the LS110, receives a different IP address each
time it boots up. To prevent the case that users do not know the IP address of the LS110 in such
environments, its IP address should be reserved on the DHCP server side. In order to reserve the IP
address in the DHCP network, the administrator needs the MAC address of the LS110 found on the
label sticker located at the bottom of the LS110:
MAC=00:01:95:04:0c:a1
3.2.2 DHCP Configuration
To make the LS110 work in DHCP mode, just set IP mode to DHCP as in Figure 3-6.
-----------------------------------------------------------------------------
IP configuration
-----------------------------------------------------------------------------
1. IP mode : Static IP
2. IP address : 192.168.23.12
3. Subnet mask : 255.255.255.0
4. Default gateway : 192.168.1.1
5. Primary DNS : 168.126.63.1
6. Secondary DNS : 168.126.63.2
<ESC> Back, <ENTER> Refresh
---> 1
Select IP mode(1 = Static IP, 2 = DHCP)
---> 2
Figure 3-6 Setting IP mode to DHCP
3.3 DNS
When users want to visit certain website, the computer asks a Domain Name System (DNS) server for
the correct IP address of the web site, and the computer uses the answer to connect to the web
server. DNS is the way that Internet domain names are identified and translated into IP addresses.
Domain name is the form of alphanumeric name such as sena.com and it is usually easier to