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Chapter 7 Interfaces
ZyWALL 110/310/1100 Series User’s Guide
172
7.10 Interface Technical Reference
Here is more detailed information about interfaces on the ZyWALL.
IP Address Assignment
Most interfaces have an IP address and a subnet mask. This information is used to create an entry
in the routing table.
Figure 99 Example: Entry in the Routing Table Derived from Interfaces
For example, if the ZyWALL gets a packet with a destination address of 100.100.25.25, it routes the
packet to interface lan1. If the ZyWALL gets a packet with a destination address of
200.200.200.200, it routes the packet to interface wan1.
In most interfaces, you can enter the IP address and subnet mask manually. In PPPoE/PPTP
interfaces, however, the subnet mask is always 255.255.255.255 because it is a point-to-point
interface. For these interfaces, you can only enter the IP address.
In many interfaces, you can also let the IP address and subnet mask be assigned by an external
DHCP server on the network. In this case, the interface is a DHCP client. Virtual interfaces,
however, cannot be DHCP clients. You have to assign the IP address and subnet mask manually.
In general, the IP address and subnet mask of each interface should not overlap, though it is
possible for this to happen with DHCP clients.
Ingress
Bandwidth
This is reserved for future use.
Enter the maximum amount of traffic, in kilobits per second, the ZyWALL can receive
from the network through the interface. Allowed values are 0 - 1048576.
OK Click OK to save your changes back to the ZyWALL.
Cancel Click Cancel to exit this screen without saving.
Table 59 Configuration > Network > Interface > Create Virtual Interface (continued)
LABEL DESCRIPTION
Table 60 Example: Routing Table Entries for Interfaces
IP ADDRESS(ES) DESTINATION
100.100.1.1/16 lan1
200.200.200.1/24 wan1
lan1
wan1