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14.1 Overview
By default, all LAN and WAN interfaces on the ZyXEL Device are in the same group and can
communicate with each other. Create interface groups to have the ZyXEL Device assign the IP
addresses in different domains to different groups. Each group acts as an independent network on
the ZyXEL Device. This lets devices connected to an interface group's LAN interfaces communicate
through the interface group's WAN or LAN interfaces but not other WAN or LAN interfaces.
14.2 The Interface Group Screen
You can manually add a LAN interface to a new group. Alternatively, you can have the ZyXEL Device
automatically add the incoming traffic and the LAN interface on which traffic is received to an
interface group when its DHCP Vendor ID option information matches one listed for the interface
group.
Use the LAN screen to configure the private IP addresses the DHCP server on the ZyXEL Device
assigns to the clients in the default and/or user-defined groups. If you set the ZyXEL Device to
assign IP addresses based on the client's DHCP Vendor ID option information, you must enable
DHCP server and configure LAN TCP/IP settings for both the default and user-defined groups. See
Chapter 8 on page 115
In the following example, the client that sends packets with the DHCP Vendor ID option set to MSFT
5.0 (meaning it is a Windows 2000 DHCP client) is assigned the IP address 192.168.2.2 and uses
the WAN VDSL_PoE/ppp0.1 interface.
Figure 85 Interface Grouping Application
DHCP Vendor ID option: MSFT 5.0
P-873HNUP-51B User's Guide
for more information.
Default: ETH 2~4
192.168.1.x/24
192.168.2.x/24
C
HAPTER
Interface Group
eth10.0
VDSL_PoE/ppp0.1
1 4
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