ZyXEL Communications ZYWALL 1050 - V2.00 EDITION 1 Betriebsanweisung PDF herunterladen (Seite 47)

ZyWALL (ZLD) CLI Reference Guide

CHAPTER 6

Interfaces

This chapter shows you how to use interface-related commands.

6.1 Interface Overview

In general, an interface has the following characteristics.

• An interface is a logical entity through which (layer-3) packets pass.

• An interface is bound to a physical port or another interface.

• Many interfaces can share the same physical port.

• An interface is bound to at most one zone.

• Many interface can belong to the same zone.

• Layer-3 virtualization (IP alias, for example) is a kind of interface.

Some characteristics do not apply to some types of interfaces.

6.1.1 Types of Interfaces

You can create several types of interfaces in the ZyWALL. The types supported vary by

ZyWALL model.

• Port groups create a hardware connection between physical ports at the layer-2 (data link,

MAC address) level.

• Ethernet interfaces are the foundation for defining other interfaces and network policies.

RIP and OSPF are also configured in these interfaces.

• VLAN interfaces receive and send 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. Unlike port groups, bridge interfaces can take

advantage of some security features in the ZyWALL. You can also assign an IP address

and subnet mask to the bridge.

• PPPoE/PPTP interfaces support Point-to-Point Protocols (PPP). ISP accounts are

required for PPPoE/PPTP interfaces.

• Cellular interfaces are for 3G WAN connections via a connected 3G device.

• WLAN interfaces are for wireless LAN (IEEE 802.11b/g) connections via an installed

wireless LAN card.

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ZyXEL Communications ZYWALL 1050 - V2.00 EDITION 1 Betriebsanweisung Seite 47