ZyXEL Communications USG FLEX H Series User Manual page 115

Table 62 Network > Interface > Interface > Internal/External > Add (VLAN)
LABEL DESCRIPTION
Subnet Mask This option appears when Interface Type is internal. Enter the subnet mask of this interface in
dot decimal notation. The subnet mask indicates what part of the IP address is the same for
all computers on the network.
DHCP Server
Mode Select what type of DHCP service the Zyxel Device provides to the network. Choices are:
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 - 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.
Start IP Enter the IP address from which the Zyxel Device begins allocating IP addresses. If 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 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
Start IP 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 Start IP 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.
ZyWALL - 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.
Advanced Settings
Chapter 7 Interfaces
USG FLEX H Series User's Guide
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