ZyXEL Communications ZyWall USG20-VPN User Manual page 212

Table 81 Configuration > Network > Interface > Bridge > Add / Edit (continued)
LABEL DESCRIPTION
Ingress This is reserved for future use.
Bandwidth
Enter the maximum amount of traffic, in kilobits per second, the USG can receive from
the network through the interface. Allowed values are 0 - 1048576.
MTU Maximum Transmission Unit. Type the maximum size of each data packet, in bytes,
that can move through this interface. If a larger packet arrives, the USG divides it into
smaller fragments. Allowed values are 576 - 1500. Usually, this value is 1500.
DHCP Setting
DHCP Select what type of DHCP service the USG provides to the network. Choices are:
None - the USG does not provide any DHCP services. There is already a DHCP server
on the network.
DHCP Relay - the USG routes DHCP requests to one or more DHCP servers you
specify. The DHCP server(s) may be on another network.
DHCP Server - the USG assigns IP addresses and provides subnet mask, gateway, and
DNS server information to the network. The USG is the DHCP server for the network.
These fields appear if the 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 USG is a DHCP Server.
IP Pool Start Enter the IP address from which the USG begins allocating IP addresses. If you want to
Address
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 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 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
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 Server Specify the IP addresses up to three DNS servers for the DHCP clients to use. Use one
Second DNS
of the following ways to specify these IP addresses.
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.
USG - the DHCP clients use the IP address of this interface and the 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.
Chapter 9 Interfaces
USG20(W)-VPN Series User's Guide
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