3Com Switch 8800 Advanced Software V5 Configuration Guide

GRE Tunnel Configuration Example 411
GRE Tunnel
Configuration
Example
GRE IPv4 over IPv4
Tunnel Configuration
Example
Network requirements
Switch 1 and Switch 2 are interconnected through an IPv4 network. Two private
IPv4 subnets Group1 and Group2 are interconnected through a GRE tunnel
between the two switches.
Network diagram
Figure 128 Network diagram for GRE application
Configuration procedure
1 Configure Switch 1
# Configure vlan-interface 100.
<Sysname1> system-view
[Sysname1] vlan 100
[Sysname1-vlan100] port GigabitEthernet 4/1/1
[Sysname1-vlan100] quit
[Sysname1] interface vlan-interface 100
[Sysname1-Vlan-interface100] ip address 10.1.1.1 255.255.255.0
[Sysname1-Vlan-interface100] quit
# Configure vlan-interface 101, the physical interface for the tunnel.
[Sysname1] vlan 101
[Sysname1-vlan101] port GigabitEthernet 4/1/2
[Sysname1-vlan101] quit
[Sysname1] interface vlan-interface 101
[Sysname1-Vlan-interface101] ip address 192.13.2.1 255.255.255.0
[Sysname1-Vlan-interface101] quit
# Create an interface named Tunnel 4/0/1.
[Sysname1] interface tunnel 4/0/1
# Configure an IPv4 address for interface Tunnel 4/0/1.
[Sysname1-Tunnel4/0/1] ip address 10.1.2.1 255.255.255.0
# Configure the tunnel encapsulation mode.
[Sysname1-Tunnel4/0/1] tunnel-protocol gre
IPv4 Netw ork
IPv4
Group1
IPv 4
Group2
Sw itc h1
Tunnel4/0/1
Vlan-interface101
192.13.2.1/24
Tunnel4/0/1
Vlan-interface101
131.108.5.2/24
Vlan-interface100
10.1.1.1/24
Vlan-interf ace100
10.1.3.1/24
Sw itc h 2
IPv4 Netw ork
IPv4
Group1
IPv 4
Group2
Sw itc h1
Tunnel
Vlan-interface101
192.13.2.1/24
Tunnel
Vlan-interface101
131.108.5.2/24
Vlan-interface100
10.1.1.1/24
Vlan-interf ace100
10.1.3.1/24
Sw itc h 2
IPv4 Netw ork
IPv4
Group1
IPv 4
Group2
Sw itc h1
Tunnel4/0/1
Vlan-interface101
192.13.2.1/24
Tunnel4/0/1
Vlan-interface101
131.108.5.2/24
Vlan-interface100
10.1.1.1/24
Vlan-interf ace100
10.1.3.1/24
Sw itc h 2
IPv4 Netw ork
IPv4
Group1
IPv 4
Group2
Sw itc h1
Tunnel
Vlan-interface101
192.13.2.1/24
Tunnel
Vlan-interface101
131.108.5.2/24
Vlan-interface100
10.1.1.1/24
Vlan-interf ace100
10.1.3.1/24
Sw itc h 2