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21-4 LAN Setup
Table 21-1 DHCP Ethernet Setup Menu Fields
FIELD
The Contivity C221 passes a DNS (Domain Name System) server IP
address (in the order you specify here) to the DHCP clients.
Select From ISP if your ISP dynamically assigns DNS server
information (and the Contivity C221's WAN IP address). The IP
Address field below displays the (read-only) DNS server IP address
that the ISP assigns. If you chose From ISP, but the Contivity C221
has a fixed WAN IP address, From ISP changes to None after you
save your changes. If you chose From ISP for the second or third DNS
server, but the ISP does not provide a second or third IP address,
From ISP changes to None after save your changes.
Select User-Defined if you have the IP address of a DNS server.
Enter the DNS server's IP address in the IP Address field below. If
you chose User-Defined, but leave the IP address set to 0.0.0.0,
User-Defined changes to None after you save your changes. If you
First DNS Server
set a second choice to User-Defined, and enter the same IP address,
Second DNS Server
the second User-Defined changes to None after you save your
Third DNS Server
changes.
Select DNS Relay to have the Contivity C221 act as a DNS proxy. The
Contivity C221's LAN IP address displays in the IP Address field
below (read-only). The Contivity C221 tells the DHCP clients on the
LAN that the Contivity C221 itself is the DNS server. When a computer
on the LAN sends a DNS query to the Contivity C221, the Contivity
C221 forwards the query to the Contivity C221's system DNS server
(configured in the SYSTEM General screen) and relays the response
back to the computer. You can only select DNS Relay for one of the
three servers; if you select DNS Relay for a second or third DNS
server, that choice changes to None after you save your changes.
Select None if you do not want to configure DNS servers. If you do not
configure a DNS server, you must know the IP address of a machine in
order to access it
Use the instructions in the following table to configure TCP/IP parameters for the LAN port.
Table 21-2 LAN TCP/IP Setup Menu Fields
FIELD
TCP/IP Setup:
317517-A Rev 00
DESCRIPTION
DESCRIPTION
EXAMPLE
EXAMPLE
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