ZyXEL Communications P-870HN-51B - V1.0 Manual page 100

Chapter 6 LAN Setup
IP Alias
IP alias allows you to partition a physical network into different logical networks
over the same Ethernet interface. The ZyXEL Device supports three logical LAN
interfaces via its single physical Ethernet interface with the ZyXEL Device itself as
the gateway for each LAN network.
When you use IP alias, you can also configure firewall rules to control access
between the LAN's logical networks (subnets).
Note: Make sure that the subnets of the logical networks do not overlap.
The following figure shows a LAN divided into subnets A and B.
Figure 47 Physical Network & Partitioned Logical Networks
Ethernet
Interface
100
A: 192.168.1.1 - 192.168.1.24
B: 192.168.2.1 - 192.168.2.24
P-870HN-51b User's Guide