Compatible Systems 5.4 - Manual (Page 48)

42 Chapter 2 - IP Routing & Bridging
IP Subinterface Dialog Box
Add IP Subinterface Dialog Box
IP Subinterface Configuration Dialog Box
Subinterfaces are added to the edit area of a device by right-clicking on any
configuration item for the device, then choosing Sub interface/Add. To delete
a sub interface, right-click on the subinterface icon, then choose Subinter-
face/Delete. These functions are also available in the Device menu.
Once you have created a subinterface, you may access the IP Subinterface
Configuration Dialog Box by clicking on TCP/IP under the subinterface icon.
IP subinterfaces allow the device to service more than one IP address range
on a single physical network segment.
Because a routed IP packet does not contain any information regarding which
networks it has passed across, the device must associate all IP packets
received from a physical segment with the primary interface connected to that
segment. As a result of this, the only IP parameters which can be set for
subinterfaces are the IP Address, IP Subnet Mask, and IP Broadcast Address.