Tunnel Interface Screen; Configuring The Tunnel Screen - ZyXEL Communications ZyWall USG 50-H Series User Manual

8.9 Tunnel Interface Screen

The ZyWALL uses tunnel interfaces in Generic Routing Encapsulation (GRE) tunneling. GRE
is a tunneling protocol developed by Cisco. 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 ZyWALL and another router over an IP network. You can also use a
GRE tunnel to transport multicast and IPv6 traffic.
Here the ZyWALL receives multicast traffic from an IP-TV Set Top Box and sends it through
a GRE tunnel to a router that routes it to an IPTV server.
Figure 141 GRE Tunnel Example
You can use tunnel interfaces in configuring:
• Static Routes
• Policy Routes
• Zones
• Trunks
• Connectivity Checking

8.9.1 Configuring the Tunnel Screen

This screen lists the ZyWALL's configured GRE tunnel interfaces. To access this screen, click
Network > Interface > Tunnel.
Figure 142 Network > Interface > Tunnel
Each field is explained in the following table.
Table 56 Network > Interface > Tunnel
LABEL
#
Name
IP Address
Mask
ZyWALL USG 50-H User's Guide
LAN
DESCRIPTION
This field is a sequential value, and it is not associated with any interface.
This field displays the name of the interface.
This is the IP address of the interface. If the interface is active (and connected),
the ZyWALL tunnels local traffic sent to this IP address to the Remote Gateway
Address.
This is the interface's subnet mask in dotted decimal notation.
Chapter 8 Interface
WAN
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