ZyXEL Communications UAG4100 User Manual Download

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Chapter 10 Interfaces

UAG4100 User’s Guide

138

IP Pool Start

Address

Enter the IP address from which the UAG 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 UAG 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

255.255.255.0 and

IP Pool Start Address

is 10.10.10.10, the UAG 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

UAG 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

Second DNS

Server

Third DNS

Server

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.

Device

- the DHCP clients use the IP address of this interface and the UAG works as a

DNS relay.

First WINS

Server, Second

WINS Server

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.

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

Options

This table is available if you selected

DHCP server

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

Section 10.3.3 on page 124

Edit

Select an entry in this table and click this to modify it.

Remove

Select an entry in this table and click this to delete it.

This field is a sequential value, and it is not associated with any entry.

Name

This is the name of the DHCP option.

Code

This is the code number of the DHCP option.

Type

This is the type of the set value for the DHCP option.

Value

This is the value set for the DHCP option.

Enable IP/MAC

Binding

Select this option to have the UAG enforce links between specific IP addresses and
specific MAC addresses for this VLAN. This stops anyone else from manually using a
bound IP address on another device connected to this interface. Use this to make use
only the intended users get to use specific IP addresses.

Table 58

Configuration > Network > Interface > VLAN > Edit (continued)

LABEL

DESCRIPTION