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18 VPN
322
The specification of the GRE protocol is available in two versions:
• GRE V.1 for use in PPTP connections (RFC 2637, configuration in the PPTP menu)
• GRE V.0 (RFC 2784) for general encapsulation using GRE
In this menu you can configure a virtual interface for using GRE V.0. The data traffic routed
over this interface is then encapsulated using GRE and sent to the specified recipient.
18.4.1 GRE Tunnels
A list of all configured GRE tunnels is displayed in the VPN->GRE->GRE Tunnels menu.
18.4.1.1 New
Choose the New button to set up new GRE tunnels.
The VPN->GRE->GRE Tunnels menu includes the following fields:
Fields in the GRE TunnelsBasic Parameters menu
Field
Description
Local GRE IP Address
Remote GRE IP Ad-
dress
Default Route
Local IP Address
Route Entries
Funkwerk Enterprise Communications GmbH
Description
Enter a description for the GRE tunnel.
Enter the source IP address of the GRE packets to the GRE
partner.
If no IP address is given (this corresponds to IP address
0.0.0.0), the source IP address of the GRE packets is selected
automatically from one of the addresses of the interface via
which the GRE partner is reached.
Specify the destination IP address of the GRE packets to the
GRE partner.
If you enable the Default Route, all data is automatically routed
to one connection.
The function is disabled by default.
Enter the (LAN) IP address to be used as the source address of
your device for sending own packets through the GRE tunnel.
Define other routing entries for this connection partner.
Add new entries with Add.
R1xxx/R3xxx/R4xxx
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