HP VPN Firewall Appliances VPN Configuration Guide

Table 3 Field description

Field Descri

tion

Tunnel Interface Name of the tunnel interface.

Tunnel Dest Address IP address of the tunnel destination.

Branch Network

Address/Mask

IP address and mask of the branch network.

GRE Key

GRE key of the tunnel, used to identify the priority of the tunnel entry. If the

tunnel peer device is not configured with a GRE key, nothing will be displayed

for this field.

Basic P2MP GRE tunnel configuration example

Network requirements

A company has a network at the headquarters and each of its branches. It is required to implement

communication between the headquarters and the branches through GRE. Figure 24 shows a simplifi

scenario, where there is only one branch.

• Firewall A is the gateway at the headquarters, and Firewall B is the gateway of the branch.

• Host A is an internal user at the headquarters and Host B is an internal user at the branch. A GRE

tunnel is established between Firewall A and Firewall B to implement communication between Host

A and Host B.

If you use P2P GRE tunnels, the number of GRE tunnels to be configured is the same as that of the

branches. To simplify the configuration at the headquarters, you can create a P2MP GRE tunnel interface

on Firewall A, and configure a GRE over IPv4 tunnel interface on Firewall B.

This example uses Firewall B to illustrate the branch gateway configuration. The configuration on other

branch gateways is similar.

Figure 24 Network diagram

Configuring Firewall A

1. Configure an IPv4 address for each interface and assign the interfaces to security zones. (Details

not shown.)

2. Create a P2MP GRE tunnel interface: