ZyXEL ZyWALL ATP700 User Guide - Page 264
Virtual Interfaces
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Chapter 9 Interfaces To allow the Zyxel Device to answer external interface ARP requests on behalf of a device on a supported interface, select the interface, click Add or Edit, then click Add in the Proxy ARP section of the screen. Figure 201 Interface > Edit > Add Proxy ARP The following table describes labels that can appear in this screen. Table 101 Interface > Edit > Add Proxy ARP LABEL DESCRIPTION Interface Name This identifies the interface for which the configuration settings that use it are displayed. Address Type Choose IPv4 Address, or IPv4 CIDR (for example, 192.168.1.1/24) or an IPv4 Range (for example, 192.168.1.2-192.168.1.100) and then enter the target IP address information. The Zyxel Device answers external ARP requests only if they match one of these inputted target IP addresses. For example, if the IPv4 Address is 192.168.1.5, then the Zyxel Device will answer ARP requests coming from the WAN only if it contains 192.168.1.5 as the target IP address. OK Click OK to save your changes back to the Zyxel Device. Cancel Click Cancel to exit this screen without saving. 9.4.3 Virtual Interfaces Use virtual interfaces to tell the Zyxel Device where to route packets. Virtual interfaces can also be used in VPN gateways (see Chapter 19 on page 419) and VRRP groups (see Chapter 35 on page 747). Virtual interfaces can be created on top of Ethernet interfaces, VLAN interfaces, or bridge interfaces. Virtual VLAN interfaces recognize and use the same VLAN ID. Otherwise, there is no difference between each type of virtual interface. Network policies (for example, security policies) that apply to the underlying interface automatically apply to the virtual interface as well. Like other interfaces, virtual interfaces have an IP address, subnet mask, and gateway used to make routing decisions. However, you have to manually specify the IP address and subnet mask; virtual interfaces cannot be DHCP clients. The virtual interface uses the same MTU and bandwidth settings that the underlying interface uses. Unlike other interfaces, virtual interfaces do not provide DHCP services, and they do not verify that the gateway is available. This screen lets you configure IP address assignment and interface parameters for virtual interfaces. To access this screen, click the Create Virtual Interface icon on the Ethernet, VLAN, or bridge interface summary screen. ZyWALL ATP Series User's Guide 264