ZyXEL Communications ZYWALL USG 20 Manual page 271

Table 66 Configuration > Network > Interface > VLAN > Edit (continued)
LABEL
DHCP
Relay Server 1 Enter the IP address of a DHCP server for the network.
Relay Server 2 This field is optional. Enter the IP address of another DHCP server for
IP Pool Start
Address
Pool Size
First DNS
Server
Second DNS
Server
Third DNS
Server
First WINS
Server, Second
WINS Server
ZyWALL USG 20/20W User's Guide
DESCRIPTION
Select what type of DHCP service the ZyWALL provides to the
network. Choices are:
None - the ZyWALL does not provide any DHCP services. There is
already a DHCP server on the network.
DHCP Relay - the ZyWALL routes DHCP requests to one or more
DHCP servers you specify. The DHCP server(s) may be on another
network.
DHCP Server - the ZyWALL assigns IP addresses and provides
subnet mask, gateway, and DNS server information to the network.
The ZyWALL is the DHCP server for the network.
These fields appear if the ZyWALL is a DHCP Relay.
the network.
These fields appear if the ZyWALL is a DHCP Server.
Enter the IP address from which the ZyWALL begins allocating IP
addresses. If you want to assign a static IP address to a specific
computer, click Add Static DHCP.
If this field is blank, the Pool Size must also be blank. In this case,
the ZyWALL can assign every IP address allowed by the interface's IP
address and subnet mask, except for the first address (network
address), last address (broadcast address) and the interface's IP
address.
Enter the number of IP addresses to allocate. This number must be at
least one and is limited by the interface's Subnet Mask. For example,
if the Subnet Mask is 255.255.255.0 and IP Pool Start Address is
10.10.10.10, the ZyWALL can allocate 10.10.10.10 to 10.10.10.254,
or 245 IP addresses.
If this field is blank, the IP Pool Start Address must also be blank.
In this case, the ZyWALL can assign every IP address allowed by the
interface's IP address and subnet mask, except for the first address
(network address), last address (broadcast address) and the
interface's IP address.
Specify the IP addresses up to three DNS servers for the DHCP clients
to use. Use one of the following ways to specify these IP addresses.
Custom Defined - enter a static IP address.
From ISP - select the DNS server that another interface received
from its DHCP server.
ZyWALL - the DHCP clients use the IP address of this interface and
the ZyWALL works as a DNS relay.
Type the IP address of the WINS (Windows Internet Naming Service)
server that you want to send to the DHCP clients. The WINS server
keeps a mapping table of the computer names on your network and
the IP addresses that they are currently using.
Chapter 11 Interfaces
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