H3C Technologies H3C SecPath F1000-E - Manual (Page 26)

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NOTE:
To avoid looping, do not configure the tunnel interface of the GRE over IPv4 tunnel as the backup interface
of the P2MP GRE tunnel interface on Device B.
Figure 16 Network diagram for P2MP GRE tunnel backup at the headquarters
Device Interface IP Address Device Interface IP Address
Device A GE1/1 11.1.1.1/24 Device B GE1/1 11.1.1.2/24
GE1/2 10.1.1.1/24 GE1/2 10.1.1.2/24
GE1/3 192.168.11.1/24 GE1/3 192.168.11.2/24
Tunnel0 172.168.1.1/24 Tunnel0 172.168.2.2/24
Tunnel1 192.168.22.1/24 Tunnel1 192.168.22.2/24
Device C GE1/1 11.1.1.3/24 Device C Tunnel0 172.168.1.3/24
GE1/2 192.168.12.1/24 Tunnel1 172.168.2.3/24
Configuration procedure
Configure IP addresses and masks for interfaces as per Figure 16 . (Omitted)
Step1 Configure Device A
# Create interface Tunnel 1 and configure an IP address for it.
system-view
[DeviceA] interface tunnel 1
[DeviceA-Tunnel1] ip address 192.168.22.1 255.255.255.0
# Configure the tunnel encapsulation mode of interface Tunnel 1 as GRE over IPv4.
[DeviceA-Tunnel1] tunnel-protocol gre
# Configure the source and destination IP addresses of interface Tunnel 1.
[DeviceA-Tunnel1] source 10.1.1.1
[DeviceA-Tunnel1] destination 10.1.1.2
[DeviceA-Tunnel1] quit
# Create interface Tunnel 0 and configure an IP address for it.
[DeviceA] interface tunnel 0
[DeviceA-Tunnel0] ip address 172.168.1.1 255.255.255.0