ZyXEL ISG50-PSTN User Guide - Page 233
Interfaces
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CHAPTER 12 Interfaces 12.1 Interface Overview Use the Interface screens to configure the ISG50's interfaces. You can also create interfaces on top of other interfaces. • Ports are the physical ports to which you connect cables. • Interfaces are used within the system operationally. You use them in configuring various features. An interface also describes a network that is directly connected to the ISG50. For example, You connect the LAN1 network to the LAN1 interface. • Zones are groups of interfaces used to ease security policy configuration. 12.1.1 What You Can Do in this Chapter • Use the Port Role screens (Section 12.2 on page 236) to create port groups and to assign physical ports and port groups to Ethernet interfaces. • Use the Ethernet screens (Section 12.3 on page 237) to configure the Ethernet interfaces. Ethernet interfaces are the foundation for defining other interfaces and network policies. RIP and OSPF are also configured in these interfaces. • Use the PPP screens (Section 12.4 on page 246) for PPPoE or PPTP Internet connections. • Use the Cellular screens (Section 12.5 on page 251) to configure settings for interfaces for Internet connections through an installed 3G card. • Use the VLAN screens (Section 12.6 on page 259) to divide the physical network into multiple logical networks. VLAN interfaces receive and send tagged frames. The ISG50 automatically adds or removes the tags as needed. Each VLAN can only be associated with one Ethernet interface. • Use the Bridge screens (Section 12.7 on page 267) to combine two or more network segments into a single network. • Use the Virtual Interface screen (Section 12.7.3 on page 275) to create virtual interfaces on top of Ethernet interfaces to tell the ISG50 where to route packets. You can create virtual Ethernet interfaces, virtual VLAN interfaces, and virtual bridge interfaces. • Use the Trunk screens (Chapter 13 on page 281) to configure load balancing. 12.1.2 What You Need to Know Interface Characteristics Interfaces generally have the following characteristics (although not all characteristics apply to each type of interface). • An interface is a logical entity through which (layer-3) packets pass. • An interface is bound to a physical port or another interface. ISG50 User's Guide 233
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