Zyxel ZyWALL-USG50 Router Manual PDF (Setup & Configuration Guide)

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Chapter 11 Interfaces

ZyWALL USG 50 User’s Guide

261

Each field is described in the table below.

Table 68

Configuration > Network > Interface > Bridge > Edit

LABEL

DESCRIPTION

Show Advance

Settings / Hide

Advance Settings

Click this button to display a greater or lesser number of configuration

fields.

General Settings

Enable

Interface

Select this to enable this interface. Clear this to disable this interface.

Interface

Properties

Interface

Name

This field is read-only if you are editing the interface. Enter the name

of the bridge interface. The format is br

x

, where

x

is 0 - 11. For

example, br0, br3, and so on.

Zone

Select the zone to which the interface is to belong. You use zones to

apply security settings such as firewall, IDP, remote management,

anti-virus, and application patrol.

Description

Enter a description of this interface. It is not used elsewhere. You can

use alphanumeric and

()+/:=?!*#@$_%-

characters, and it can be

up to 60 characters long.

Member

Configuration

Available

This field displays Ethernet interfaces and VLAN interfaces that can

become part of the bridge interface. An interface is not available in

the following situations:

•

There is a virtual interface on top of it

•

It is already used in a different bridge interface

Select one, and click the

>>

arrow to add it to the bridge interface.

Each bridge interface can only have one VLAN interface.

Member

This field displays the interfaces that are part of the bridge interface.

Select one, and click the

<<

arrow to remove it from the bridge

interface.

IP Address

Assignment

Get

Automatically

Select this if this interface is a DHCP client. In this case, the DHCP

server configures the IP address, subnet mask, and gateway

automatically.

Use Fixed IP

Address

Select this if you want to specify the IP address, subnet mask, and

gateway manually.

IP Address

This field is enabled if you select

Use Fixed IP Address

.

Enter the IP address for this interface.

Subnet Mask

This field is enabled if you select

Use Fixed IP Address

.

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 in the network.

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Gateway

This field is enabled if you select

Use Fixed IP Address

.

Enter the IP address of the gateway. The ZyWALL sends packets to

the gateway when it does not know how to route the packet to its

destination. The gateway should be on the same network as the

interface.

Metric

Enter the priority of the gateway (if any) on this interface. The

ZyWALL decides which gateway to use based on this priority. The

lower the number, the higher the priority. If two or more gateways

have the same priority, the ZyWALL uses the one that was configured

first.

Related Setting

Configure

WAN TRUNK

Click

WAN TRUNK

to go to a screen where you can configure the

interface as part of a WAN trunk for load balancing.

Configure

Policy Route

Click

Policy Route

to go to the screen where you can manually

configure a policy route to associate traffic with this bridge interface.

Interface

Parameters

Egress

Bandwidth

Enter the maximum amount of traffic, in kilobits per second, the

ZyWALL can send through the interface to the network. Allowed

values are 0 - 1048576.

Ingress

Bandwidth

This is reserved for future use.

Enter the maximum amount of traffic, in kilobits per second, the

ZyWALL 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 ZyWALL 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 ZyWALL provides to the

network. Choices are:

None

- the ZyWALL does not provide any DHCP services. There is

already a DHCP server on the network.

DHCP Relay

- the ZyWALL routes DHCP requests to one or more

DHCP servers you specify. The DHCP server(s) may be on another

network.

DHCP Server

- the ZyWALL assigns IP addresses and provides

subnet mask, gateway, and DNS server information to the network.

The ZyWALL is the DHCP server for the network.

These fields appear if the ZyWALL 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 is a

DHCP Server

.

Table 68

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

LABEL

DESCRIPTION

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IP Pool Start

Address

Enter the IP address from which the ZyWALL 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 ZyWALL 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 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 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.

ZyWALL

- the DHCP clients use the IP address of this interface and

the ZyWALL 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.

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.

Enable IP/MAC

Binding

Select this option to have this interface enforce links between specific

IP addresses and specific MAC addresses. 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.

Enable Logs

for IP/MAC

Binding

Violation

Select this option to have the ZyWALL generate a log if a device

connected to this interface attempts to use an IP address that is

bound to another device’s MAC address.

Static DHCP

Table

Configure a list of static IP addresses the ZyWALL assigns to

computers connected to the interface. Otherwise, the ZyWALL assigns

an IP address dynamically using the interface’s

IP Pool Start

Address

and

Pool Size

.

Table 68

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

LABEL

DESCRIPTION

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264

11.7.3

Virtual Interfaces Add/Edit

This screen lets you configure IP address assignment and interface parameters for

virtual interfaces. To access this screen, click an

Add

icon next to an Ethernet

Add

Click this to create a new entry.

Edit

Select an entry and click this to be able to modify it.

Remove

Select an entry and click this to delete it.

#

This field is a sequential value, and it is not associated with a specific

entry.

IP Address

Enter the IP address to assign to a device with this entry’s MAC

address.

MAC Address

Enter the MAC address to which to assign this entry’s IP address.

Description

Enter a description to help identify this static DHCP entry. You can use

alphanumeric and

()+/:=?!*#@$_%-

characters, and it can be up to

60 characters long.

Connectivity

Check

The interface can regularly check the connection to the gateway you

specified to make sure it is still available. You specify how often the

interface checks the connection, how long to wait for a response

before the attempt is a failure, and how many consecutive failures are

required before the ZyWALL stops routing to the gateway. The

ZyWALL resumes routing to the gateway the first time the gateway

passes the connectivity check.

Enable

Connectivity

Check

Select this to turn on the connection check.

Check Method

Select the method that the gateway allows.

Select

icmp

to have the ZyWALL regularly ping the gateway you

specify to make sure it is still available.

Select

tcp

to have the ZyWALL regularly perform a TCP handshake

with the gateway you specify to make sure it is still available.

Check Period

Enter the number of seconds between connection check attempts.

Check Timeout

Enter the number of seconds to wait for a response before the

attempt is a failure.

Check Fail

Tolerance

Enter the number of consecutive failures before the ZyWALL stops

routing through the gateway.

Check Default

Gateway

Select this to use the default gateway for the connectivity check.

Check this

address

Select this to specify a domain name or IP address for the

connectivity check. Enter that domain name or IP address in the field

next to it.

Check Port

This field only displays when you set the

Check Method

to

tcp

.

Specify the port number to use for a TCP connectivity check.

OK

Click

OK

to save your changes back to the ZyWALL.

Cancel

Click

Cancel

to exit this screen without saving.

Table 68

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

LABEL

DESCRIPTION

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Chapter 11 Interfaces

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265

interface, VLAN interface, or bridge interface in the respective interface summary

screen.

Figure 166

Configuration > Network > Interface > Add

Each field is described in the table below.

Table 69

Configuration > Network > Interface > Add

LABEL

DESCRIPTION

Interface

Properties

Interface

Name

This field is read-only. It displays the name of the virtual interface,

which is automatically derived from the underlying Ethernet interface,

VLAN interface, or bridge interface.

Description

Enter a description of this interface. It is not used elsewhere. You can

use alphanumeric and

()+/:=?!*#@$_%-

characters, and it can be

up to 60 characters long.

IP Address

Assignment

IP Address

Enter the IP address for this interface.

Subnet Mask

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 in the network.

Gateway

Enter the IP address of the gateway. The ZyWALL sends packets to

the gateway when it does not know how to route the packet to its

destination. The gateway should be on the same network as the

interface.

Metric

Enter the priority of the gateway (if any) on this interface. The

ZyWALL decides which gateway to use based on this priority. The

lower the number, the higher the priority. If two or more gateways

have the same priority, the ZyWALL uses the one that was configured

first.

Interface

Parameters

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