ZyXEL Communications ZyWALL 1100 User Manual page 175

Table 76 Configuration > Network > Interface > Ethernet > Edit (continued)
LABEL DESCRIPTION
DHCP Select what type of DHCP service the ZyWALL/USG provides to the network. Choices
are:
None - the ZyWALL/USG does not provide any DHCP services. There is already a DHCP
server on the network.
DHCP Relay - the ZyWALL/USG routes DHCP requests to one or more DHCP servers
you specify. The DHCP server(s) may be on another network.
DHCP Server - the ZyWALL/USG assigns IP addresses and provides subnet mask,
gateway, and DNS server information to the network. The ZyWALL/USG is the DHCP
server for the network.
These fields appear if the ZyWALL/USG is a DHCP Relay.
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 the network.
These fields appear if the ZyWALL/USG is a DHCP Server.
IP Pool Start Enter the IP address from which the ZyWALL/USG begins allocating IP addresses. If
Address
you want to assign a static IP address to a specific computer, use the Static DHCP
Table.
If this field is blank, the Pool Size must also be blank. In this case, the ZyWALL/USG
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.
Pool Size 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/USG 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/USG 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.
First DNS Specify the IP addresses up to three DNS servers for the DHCP clients to use. Use one
Server, Second
of the following ways to specify these IP addresses.
DNS Server,
Third DNS
Custom Defined - enter a static IP address.
Server
From ISP - select the DNS server that another interface received from its DHCP
server.
ZyWALL/USG - the DHCP clients use the IP address of this interface and the ZyWALL/
USG works as a DNS relay.
First WINS Type the IP address of the WINS (Windows Internet Naming Service) server that you
Server, Second
want to send to the DHCP clients. The WINS server keeps a mapping table of the
WINS Server
computer names on your network and the IP addresses that they are currently using.
Default Router If you set this interface to DHCP Server, you can select to use either the interface's IP
address or another IP address as the default router. This default router will become the
DHCP clients' default gateway.
To use another IP address as the default router, select Custom Defined and enter the
IP address.
Lease time Specify how long each computer can use the information (especially the IP address)
before it has to request the information again. Choices are:
infinite - select this if IP addresses never expire.
days, hours, and minutes - select this to enter how long IP addresses are valid.
Chapter 9 Interfaces
ZyWALL/USG Series User's Guide
175