SENA PS400 - Manual (Page 24)

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servers will be automatically configured when the IP address is assigned in DHCP mode. DHCP uses
the concept of a "lease" or amount of time for which a given IP address will be valid for a computer. All
the parameters required to assign an IP address are configured on DHCP server side, and each
DHCP client computer receives this information when the IP address is provided at its boot-up.
To obtain an IP address, the HelloDevice Pro Series sends a corresponding DHCP request as a
broadcast over the network af ter 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
HelloDevice Pro Series immediately places this information in its non-volatile memory. If the operating
time reaches the lease time, the HelloDevice Pro Series will request the DHCP server for renewal of
its lease time. If the DHCP server approves extending the lease, the HelloDevice Pro Series can
continue to work with the current IP address. Otherwise, the HelloDevice Pro Series will start the
procedure to request a new IP address to the DHCP server.
Note:
In DHCP mode, all the network-related parameters for the HelloDevice Pro Series are supposed to be
configured automatically. In case that automatic configuration of DNS server fails, it can be configured
manually in Manual DNS Configuration menu. (See Manual DNS Configuration in section 5.3 for
further information).
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 HelloDevice Pro Series, receives a different
IP address each time it boots up. To prevent the case that users do not know the IP address of the
HelloDevice Pro Series 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 HelloDevice Pro Series found on the label sticker at the bottom of the HelloDevice Pro
Series:
MAC=00:01:95:04:0c:a1
3.2.2 DHCP setting
----------------------------------------------------
IP configuration
----------------------------------------------------
Select menu:
IP mode: DHCP
<ESC> Back, <ENTER> Refresh
--- > 1
Select mode (1 = Static IP, 2 = DHCP, 3 = PPPoE)
--- > 2
Figure 3-6. Setting DHCP mode