ZyXEL Communications ISG50 User Manual

 Chapter 12 Interfaces

ISG50 User’s Guide

• Zero or one VLAN interfaces (and any associated virtual VLAN interfaces)
• Any number of Ethernet interfaces (and any associated virtual Ethernet interfaces)

When you create a bridge interface, the ISG50 removes the members’ entries from the routing 
table and adds the bridge interface’s entries to the routing table. For example, this table shows the 
routing table before and after you create bridge interface br0 (250.250.250.0/23) between lan1 
and vlan1. 

In this example, virtual Ethernet interface lan1:1 is also removed from the routing table when lan1 
is added to br0. Virtual interfaces are automatically added to or remove from a bridge interface 
when the underlying interface is added or removed.

This screen lists every bridge interface and virtual interface created on top of bridge interfaces. To 
access this screen, click Configuration > Network > Interface > Bridge.

Configuration > Network > Interface > Bridge      

Each field is described in the following table. 

Example: Routing Table Before and After Bridge Interface br0 Is Created

210.210.210.0/24

lan1

221.221.221.0/24

vlan0

210.211.1.0/24

lan1:1

230.230.230.192/26

wan2

221.221.221.0/24

vlan0

241.241.241.241/32

dmz

222.222.222.0/24

vlan1

242.242.242.242/32

dmz

230.230.230.192/26

wan2

250.250.250.0/23

br0

241.241.241.241/32

dmz

242.242.242.242/32

dmz

Configuration > Network > Interface > Bridge

Add

Click this to create a new entry.

Edit

Double-click an entry or select it and click Edit to open a screen where you can modify 
the entry’s settings. 

Remove

To remove an entry, select it and click Remove. The ISG50 confirms you want to 
remove it before doing so.

Activate

To turn on an entry, select it and click Activate.

Inactivate

To turn off an entry, select it and click Inactivate.

Create Virtual 
Interface

To open the screen where you can create a virtual interface, select an interface and 
click Create Virtual Interface.