ZyXEL Communications ZyWall ATP series User Manual page 225

Table 91 Configuration > Network > Interface > Ethernet > Edit (continued)
LABEL DESCRIPTION
DHCP Select what type of DHCP service the Zyxel Device provides to the network. Choices are:
None - the Zyxel Device does not provide any DHCP services. There is already a DHCP
server on the network.
DHCP Relay - the Zyxel Device routes DHCP requests to one or more DHCP servers you
specify. The DHCP server(s) may be on another network.
DHCP Server - the Zyxel Device assigns IP addresses and provides subnet mask, gateway,
and DNS server information to the network. The Zyxel Device is the DHCP server for the
network.
These fields appear if the Zyxel Device 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 Zyxel Device is a DHCP Server.
IP Pool Start Enter the IP address from which the Zyxel Device begins allocating IP addresses. If you want
Address
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 Zyxel Device 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 Zyxel Device 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 Zyxel Device
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 Server, Specify the IP addresses up to three DNS servers for the DHCP clients to use. Use one of the
Second DNS
following ways to specify these IP addresses.
Server, Third DNS
Server
Custom Defined - enter a static IP address.
From ISP - select the DNS server that another interface received from its DHCP server.
Zyxel Device - the DHCP clients use the IP address of this interface and the Zyxel Device
works as a DNS relay.
First WINS Server, Type the IP address of the WINS (Windows Internet Naming Service) server that you want to
Second WINS
send to the DHCP clients. The WINS server keeps a mapping table of the computer names
Server
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.
Extended This table is available if you selected DHCP server.
Options
Configure this table if you want to send more information to DHCP clients through DHCP
packets.
Add Click this to create an entry in this table. See
Chapter 9 Interfaces
ZyWALL ATP Series User's Guide
225
Section 9.3.6 on page 232.