Tunnel Interfaces - ZyXEL Communications ZyWall USG20-VPN User Manual

Table 72 Configuration > Network > Interface > Cellular > Add / Edit (continued)
LABEL
Actions when over
% of time budget or
% of data budget
Log
OK
Cancel

9.6 Tunnel Interfaces

The USG uses tunnel interfaces in Generic Routing Encapsulation (GRE), IPv6 in IPv4, and 6to4
tunnels.
GRE Tunneling
GRE tunnels encapsulate a wide variety of network layer protocol packet types inside IP tunnels. A
GRE tunnel serves as a virtual point-to-point link between the USG and another router over an IPv4
network. At the time of writing, the USG only supports GRE tunneling in IPv4 networks.
Figure 130 GRE Tunnel Example
IPv6 Over IPv4 Tunnels
To route traffic between two IPv6 networks over an IPv4 network, an IPv6 over IPv4 tunnel has to
be used.
Figure 131 IPv6 over IPv4 Network
On the USG, you can either set up a manual IPv6-in-IPv4 tunnel or an automatic 6to4 tunnel. The
following describes each method:
Chapter 9 Interfaces
DESCRIPTION
Specify the actions the USG takes when the specified percentage of time budget or
data limit is exceeded. Enter a number from 1 to 99 in the percentage fields. If you
change the value after you configure and enable budget control, the USG resets the
statistics.
Select None to not create a log when the USG takes this action, Log to create a log, or
Log-alert to create an alert log. If you select Log or Log-alert you can also select
recurring every to have the USG send a log or alert for this event periodically.
Specify how often (from 1 to 65535 minutes) to send the log or alert.
Click OK to save your changes back to the USG.
Click Cancel to exit this screen without saving.
IPv4
IPv6
USG20(W)-VPN Series User's Guide
Internet
IPv4
183
IPv6