Interface Types - ZyXEL Communications ZYWALL USG 20 Manual

6.2.1 Interface Types

There are many types of interfaces in the ZyWALL. In addition to being used in
various features, interfaces also describe the network that is directly connected to
the ZyWALL.
• Ethernet interfaces are the foundation for defining other interfaces and
network policies. You also configure RIP and OSPF in these interfaces.
• Port groups create a hardware connection between physical ports at the layer-
2 (data link, MAC address) level. Port groups are created when you use the
Interface > Port Roles screen to set multiple physical ports to be part of the
same (lan1, lan2 or dmz) interface.
• PPP interfaces support Point-to-Point Protocols (PPPoE or PPTP). ISP accounts
are required for PPPoE/PPTP interfaces.
• VLAN interfaces recognize tagged frames. The ZyWALL automatically adds or
removes the tags as needed. Each VLAN can only be associated with one
Ethernet interface.
• Bridge interfaces create a software connection between Ethernet or VLAN
interfaces at the layer-2 (data link, MAC address) level. Then, you can configure
the IP address and subnet mask of the bridge. It is also possible to configure
zone-level security between the member interfaces in the bridge.
• Virtual interfaces increase the amount of routing information in the ZyWALL.
There are three types: virtual Ethernet interfaces (also known as IP alias),
virtual VLAN interfaces, and virtual bridge interfaces.
ZyWALL USG 20/20W User's Guide
Chapter 6 Configuration Basics
89