HP VPN Firewall Appliances VPN Configuration Guide

5
• RFC 2784, Generic Routing Encapsulation (GRE)
Configuring a GRE over IPv4 tunnel in the Web
interface
Configuration prerequisites
Before you configure a GRE over IPv4 tunnel, configure an IP address for the interface (such as a VLAN
interface, an Ethernet interface, or a Loopback interface) to be used as the source interface of the tunnel
interface.
Recommended configuration procedure
Ste
p
Remarks
1. Creating a GRE over IPv4
tunnel interface
Required.
Create a tunnel interface and configure GRE over IPv4 tunnel related
parameters.
2. Configuring a route for
packet forwarding through
the tunnel
Optional.
Each end of the tunnel must have a route (static or dynamic) for packet
forwarding through the tunnel to the other end.
For more information about routing configuration, see Network
Management Configuration Guide.
IMPORTANT:
The destination IP address of the static route configured on the tunnel interface
cannot be in the same subnet as the IP address of the tunnel interface.
Creating a GRE over IPv4 tunnel interface
1. Select VPN > GRE > GRE from the navigation tree to enter the GRE over IPv4 tunnel interface
management page.
Figure 8 GRE over IPv4 tunnel management page
2. Click Add to add a GRE over IPv4 tunnel interface.