Virtual Interfaces; Virtual Interfaces Add/Edit - ZyXEL Communications USG40 User Manual

Table 90 Configuration > Network > Interface > Bridge > Create Virtual Interface (continued)
LABEL
Check Method
Check Period
Check Timeout
Check Fail
Tolerance
Check Default
Gateway
Check this
address
Check Port
Related Setting
Configure WAN
TRUNK
Configure Policy
Route
OK
Cancel

8.9 Virtual Interfaces

Use virtual interfaces to tell the ZyWALL/USG where to route packets. Virtual interfaces can also be
used in VPN gateways (see
503).
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. Like other interfaces, you can restrict bandwidth through
virtual interfaces, but you cannot change the MTU. The virtual interface uses the same MTU 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.

8.9.1 Virtual Interfaces Add/Edit

This screen lets you configure IP address assignment and interface parameters for virtual
interfaces. To access this screen, click the Create Virtual Interface icon in the Ethernet, VLAN, or
bridge interface summary screen.
Chapter 8 Interfaces
DESCRIPTION
Select the method that the gateway allows.
Select icmp to have the ZyWALL/USG regularly ping the gateway you specify to make
sure it is still available.
Select tcp to have the ZyWALL/USG regularly perform a TCP handshake with the
gateway you specify to make sure it is still available.
Enter the number of seconds between connection check attempts.
Enter the number of seconds to wait for a response before the attempt is a failure.
Enter the number of consecutive failures before the ZyWALL/USG stops routing through
the gateway.
Select this to use the default gateway for the connectivity check.
Select this to specify a domain name or IP address for the connectivity check. Enter
that domain name or IP address in the field next to it.
This field only displays when you set the Check Method to tcp. Specify the port
number to use for a TCP connectivity check.
Click WAN TRUNK to go to a screen where you can configure the interface as part of a
WAN trunk for load balancing.
Click Policy Route to go to the screen where you can manually configure a policy
route to associate traffic with this bridge interface.
Click OK to save your changes back to the ZyWALL/USG.
Click Cancel to exit this screen without saving.
Chapter 19 on page
ZyWALL/USG Series User's Guide
221
340) and VRRP groups (see Chapter 31 on page