ZyXEL ZyWALL ATP700 User Guide - Page 239
Types of Interfaces
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Chapter 9 Interfaces • 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 belongs to at most one zone. • Many interfaces can belong to the same zone. • Layer-3 virtualization (IP alias, for example) is a kind of interface. Types of Interfaces You can create several types of interfaces in the Zyxel Device. • Setting interfaces to the same port role forms a port group. Port groups creates 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 or Interface > Port Groups screen to set multiple physical ports to be part of the same interface. • Ethernet interfaces are the foundation for defining other interfaces and network policies. RIP and OSPF are also configured in these interfaces. • Tunnel interfaces send IPv4 or IPv6 packets from one network to a specific network through the Internet or a public network. • VLAN interfaces receive and send tagged frames. The Zyxel Device 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 Zyxel Device. You can also assign an IP address and subnet mask to the bridge. • PPP interfaces support Point-to-Point Protocols (PPP). ISP accounts are required for PPPoE/PPTP/L2TP interfaces. • Cellular interfaces are for mobile broadband WAN connections via a connected mobile broadband device. • Virtual interfaces provide additional routing information in the Zyxel Device. There are three types: virtual Ethernet interfaces, virtual VLAN interfaces, and virtual bridge interfaces. • Trunk interfaces manage load balancing between interfaces. Port groups and trunks have a lot of characteristics that are specific to each type of interface. The other types of interfaces--Ethernet, PPP, cellular, VLAN, bridge, and virtual--have a lot of similar characteristics. These characteristics are listed in the following table and discussed in more detail below. Table 95 Ethernet, PPP, Cellular, VLAN, Bridge, and Virtual Interface Characteristics CHARACTERISTICS ETHERNET ETHERNET PPP CELLULAR VLAN BRIDGE Name* wan1, wan2 lan1, lan2, dmz pppx cellularx vlanx brx Configurable Zone No No Yes Yes Yes Yes IP Address Assignment Static IP address Yes Yes Yes Yes Yes Yes DHCP client Yes No Yes Yes Yes Yes Routing metric Yes Yes Yes Yes Yes Yes Interface Parameters VIRTUAL ** No Yes No Yes ZyWALL ATP Series User's Guide 239