A tunnel interface is a virtual network adapter that can be used to create a point-to-point connection via an IP network. The following types of tunnel interfaces are supported:
-
GRE: a network packet tunneling protocol developed by Cisco Systems. Its main purpose is to encapsulate network layer packets into IP packets. The IP protocol number is 47.
-
IPIP: an IP tunneling protocol that encapsulates an IP packet into another IP packet by adding an external header that contains the Source IP (tunnel entry point) and Destination IP (tunnel exit point).
-
VXLAN: a protocol for tunneling Layer 2 Ethernet frames into UDP packets. Uses port 4789.
To create a tunnel interface, in the Network --> Interfaces section, click Add and select Add tunnel. Provide the following settings:
|
Name |
Description |
|---|---|
|
Enabled |
Enable or disable the interface. |
|
Name |
The interface name. Should be in the form greN, where N is the ordinal number of the tunnel interface. |
|
Description |
Interface description. |
|
Zone |
The zone to which this interface will belong. |
|
Mode |
The tunnel's operating mode: GRE, IPIP, or VXLAN. |
|
MTU |
The MTU size for the selected interface. |
|
Local IP |
The local address of the point-to-point interface. |
|
Remote IP |
The remote address of the point-to-point interface. |
|
Interface IP |
The IP address assigned to the tunnel interface. |
|
VXLAN ID |
The VXLAN ID. Relevant only for a VXLAN tunnel. |