Interface Grouping
Interface Grouping 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 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.
Interface Grouping
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 Setup 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 Home Networking for more information.
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.
Interface Grouping Application
You can use this screen to create new user-defined interface groups or modify existing ones. Interfaces that do not belong to any user-defined group always belong to the default group.
Click Network Setting > Interface Grouping to open the following screen.
Network Setting > Interface Grouping
The following table describes the fields in this screen.
Network Setting > Interface Grouping 
Label
Description
Add New Interface Group
Click this button to create a new interface group.
Group Name
This shows the descriptive name of the group.
WAN Interface
This shows the WAN interfaces in the group.
LAN Interfaces
This shows the LAN interfaces in the group.
Criteria
This shows the filtering criteria for the group.
Modify
Click the Edit icon to modify an existing Interface group setting or click the Delete icon to remove the Interface group.
Interface Group Configuration
Click the Add New Interface Group button in the Interface Grouping screen to open the following screen. Use this screen to create a new interface group. If you want to automatically add LAN clients to a new group, use filtering criteria.
*An interface can belong to only one group at a time.
*After configuring a vendor ID, reboot the client device attached to the Zyxel Device to obtain an appropriate IP address.
*You can have up to 15 filter criteria.
Network Setting > Interface Grouping > Add New Interface Group (for DSL routers)
Network Setting > Interface Grouping > Add New Interface Group (for Ethernet routers)
Network Setting > Interface Grouping > Add New Interface Group (for AON and PON routers)
The following table describes the fields in this screen.
Network Setting > Interface Grouping > Add New Interface Group/Edit 
Label
Description
Group Name
Enter a descriptive name for this interface group. You can use up to 32 printable characters except [ " ], [ ` ], [ ' ], [ < ], [ > ], [ ^ ], [ $ ], [ | ], [ & ], or [ ; ]. Spaces are allowed.
WAN Interfaces used in the grouping
Select the WAN interface this group uses. The group can have up to one PTM interface, up to one ATM interface, up to one ETH interface, and up to one WWAN interface.
Select None to not add a WAN interface to this group.
Selected LAN Interfaces
Available LAN Interfaces
Select one or more interfaces (Ethernet LAN, wireless LAN) in the Available LAN Interfaces list and use the left arrow to move them to the Selected LAN Interfaces list to add the interfaces to this group.
To remove a LAN or wireless LAN interface from the Selected LAN Interfaces, use the right-facing arrow.
Automatically Add Clients With the following DHCP Vendor IDs
Click Add to identify LAN hosts to add to the interface group by criteria such as the type of the hardware or firmware. See Interface Grouping Criteria for more information.
#
This shows the index number of the rule.
Filter Criteria
This shows the filtering criteria. The LAN interface on which the matched traffic is received will belong to this group automatically.
WildCard Support
This shows if wildcard on DHCP option 60 is enabled.
Modify
Click the Edit icon to change the group setting.
Click the Delete icon to delete this group from the Zyxel Device.
Cancel
Click Cancel to exit this screen without saving.
OK
Click OK to save your changes.
Interface Grouping Criteria
Click the Add button in the Interface Grouping Configuration screen to open the following screen. Use this screen to automatically add clients to an interface group based on specified criteria. You can choose to define a group based on a MAC address, a vendor ID (DHCP option 60), an Identity Association Identifier (DHCP option 61), vendor specific information (DHCP option 125), or a VLAN group.
Network Setting > Interface Grouping > Interface Group Configuration: Add
The following table describes the fields in this screen.
Network Setting > Interface Grouping > Interface Group Configuration: Add 
Label
Description
Source MAC Address
Enter the source MAC address of the packet.
APAS MAC Filter
Select this option and enter the MAC address of the matched LAN host.
DHCP Option 60
Select this option and enter the Vendor Class Identifier (Option 60) of the matched traffic, such as the type of the hardware or firmware.
Enable wildcard
Select this option to be able to use wildcards in the Vendor Class Identifier configured for DHCP option 60.
DHCP Option 61
Select this and enter the device identity of the matched traffic.
 
Enter the Identity Association Identifier (IAID) of the device, for example, the WAN connection index number.
DHCP Option 125
Select this and enter vendor specific information of the matched traffic.
Enterprise Number
Enter the vendor’s 32-bit enterprise number registered with the IANA (Internet Assigned Numbers Authority).
Manufacturer OUI
Specify the vendor’s OUI (Organization Unique Identifier). It is usually the first 3 bytes of the MAC address.
Serial Number
Enter the serial number of the device.
Product Class
Enter the product class of the device.
VLAN Group
Select this and the VLAN group of the matched traffic from the drop-down list box. A VLAN group can be configured in Network Setting > VLAN Group.
Cancel
Click Cancel to exit this screen without saving.
OK
Click OK to save your changes.