Chapter 7 Interfaces

Table 49 Configuration > Network > Interface > Cellular > Add (continued)

LABEL

DESCRIPTION

Log

Select None to not create a log when the ZyWALL takes this action, Log to create a

 

log, or Log-alertto create an alert log. If you select Log or Log-alertyou can also

 

select recurring every to have the ZyWALL send a log or alert for this event

 

periodically. Specify how often (from 1 to 65535 minutes) to send the log or alert.

 

 

OK

Click OK to save your changes back to the ZyWALL.

 

 

Cancel

Click Cancel to exit this screen without saving.

 

 

7.6 Tunnel Interfaces

The ZyWALL 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 ZyWALL and another router over an IPv4 network. At the time of writing, the ZyWALL only supports GRE tunneling in IPv4 networks.

Figure 86 GRE Tunnel Example

IPv4

Internet

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 87 IPv6 over IPv4 Network

IPv6

 

IPv4

 

IPv6

 

 

On the ZyWALL, you can either set up a manual IPv6-in-IPv4 tunnel or an automatic 6to4 tunnel. The following describes each method:

IPv6-in-IPv4 Tunneling

Use this mode on the WAN of the ZyWALL if

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ZyWALL 110/310/1100 Series User’s Guide