Huawei AR1200 Series - Example for Configuring the Keepalive Function for GRE

peer 1.1.1.9 as-number 100
peer 1.1.1.9 connect-interface LoopBack1
#
ipv4-family unicast
undo synchronization
peer 1.1.1.9 enable
#
ipv4-family vpnv4
policy vpn-target
peer 1.1.1.9 enable
#
ipv4-family vpn-instance vpn1
import-route direct
import-route isis 50
#
ospf 10
area 0.0.0.0
network 3.3.3.9 0.0.0.0
network 110.1.1.0 0.0.0.255
#
return
l Configuration file of CE2
#
sysname CE2
#
isis 50
network-entity 50.0000.0000.0004.00
#
interface GigabitEthernet1/0/0
ip address 11.1.1.1 255.255.255.0
isis enable 50
#
interface GigabitEthernet2/0/0
ip address 41.1.1.2 255.255.255.0
isis enable 50
#
return
1.7.5 Example for Configuring the Keepalive Function for GRE
This section provides an example for configuring the Keepalive function of the GRE tunnel. In
this manner, the VPN does not select the GRE tunnel that cannot reach the remote end, and data
loss can be avoided.
Networking Requirements
As shown in Figure 1-9, Router A and Router B are configured with the GRE protocol. The two
ends of the GRE tunnel need be configured with the Keepalive function.
Figure 1-9 Networking diagram of configuring the Keepalive function on two ends of a GRE
tunnel
GE1/0/0
20.1.1.1/24
GE1/0/0
30.1.1.2/24
Internet
GRE Tunnel
Tunnel0/0/1
40.1.1.1/24
Tunnel0/0/1
40.1.1.2/24
RouterA RouterB
Huawei AR1200 Series Enterprise Routers
Configuration Guide - VPN 1 GRE Configuration
Issue 01 (2012-04-20) Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
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