Bridge Summary - ZyXEL Communications ZyWALL 1100 User Manual

If computer B responds to computer A, bridge X records the source address 0B:0B:0B:0B:0B:0B
and port 4 in the table. It also looks up 0A:0A:0A:0A:0A:0A in the table and sends the packet to
port 2 accordingly.
Table 90 Example: Bridge Table After Computer B Responds to Computer A
MAC ADDRESS
0A:0A:0A:0A:0A:0A
0B:0B:0B:0B:0B:0B
Bridge Interface Overview
A bridge interface creates a software bridge between the members of the bridge interface. It also
becomes the ZyWALL/USG's interface for the resulting network.
Unlike the device-wide bridge mode in ZyNOS-based ZyWALL/USGs, this ZyWALL/USG can bridge
traffic between some interfaces while it routes traffic for other interfaces. The bridge interfaces also
support more functions, like interface bandwidth parameters, DHCP settings, and connectivity
check. To use the whole ZyWALL/USG as a transparent bridge, add all of the ZyWALL/USG's
interfaces to a bridge interface.
A bridge interface may consist of the following members:
• 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 ZyWALL/USG 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.
Table 91 Example: Routing Table Before and After Bridge Interface br0 Is Created
IP ADDRESS(ES)
210.210.210.0/24
210.211.1.0/24
221.221.221.0/24
222.222.222.0/24
230.230.230.192/26
241.241.241.241/32
242.242.242.242/32
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.

9.8.1 Bridge Summary

This screen lists every bridge interface and virtual interface created on top of bridge interfaces. If
you enabled IPv6 in the Configuration > System > IPv6 screen, you can also configure bridge
interfaces used for your IPv6 network on this screen. To access this screen, click Configuration >
Network > Interface > Bridge.
Chapter 9 Interfaces
PORT
2
4
DESTINATION
lan1
lan1:1
vlan0
vlan1
wan2
dmz
dmz
ZyWALL/USG Series User's Guide
216
IP ADDRESS(ES)
221.221.221.0/24
230.230.230.192/26
241.241.241.241/32
242.242.242.242/32
250.250.250.0/23
DESTINATION
vlan0
wan2
dmz
dmz
br0