Example for Configuring an IPv4 over IPv6 Tunnel

NetEngine AR V300R019 CLI-based Configuration Guide - IP Service

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Networking Requirements

In Figure 12-2, two IPv4 networks connect to an IPv6 network through RT1 and RT5. Border devices RT2 and RT4 on the IPv6 network support the IPv4/IPv6 dual stack. An IPv4 over IPv6 tunnel needs to be set up between RT2 and RT4 so that physically isolated IPv4 networks can communicate.

Figure 12-2 Networking diagram for configuring an IPv4 over IPv6 tunnel

Configuration Roadmap

The configuration roadmap is as follows:

Configure an IPv4 over IPv6 tunnel on the border devices at both ends of the IPv6 network.
Use a dynamic routing protocol to configure a route for the tunnel interface to forward packets.

Procedure

Configure an IPv6 address for the physical interface and enable IPv6 capability for IS-IS on the IPv6 network to implement IP connectivity of the IPv6 network.

# Configure RT2.

<Huawei> system-view
[Huawei] sysname RT2
[RT2] ipv6
[RT2] interface gigabitethernet 2/0/0
[RT2-GigabitEthernet2/0/0] ipv6 enable
[RT2-GigabitEthernet2/0/0] ipv6 address fc00:1::1 64
[RT2-GigabitEthernet2/0/0] quit
[RT2] isis 1
[RT2-isis-1] network-entity 10.0000.0000.0001.00
[RT2-isis-1] ipv6 enable topology standard
[RT2-isis-1] quit
[RT2] interface gigabitethernet 2/0/0
[RT2-GigabitEthernet2/0/0] isis ipv6 enable 1
[RT2-GigabitEthernet2/0/0] quit

# Configure RT3.

<Huawei> system-view
[Huawei] sysname RT3
[RT3] ipv6
[RT3] interface gigabitethernet 1/0/0
[RT3-GigabitEthernet1/0/0] ipv6 enable
[RT3-GigabitEthernet1/0/0] ipv6 address fc00:1::2 64
[RT3-GigabitEthernet1/0/0] quit
[RT3] interface gigabitethernet 2/0/0
[RT3-GigabitEthernet2/0/0] ipv6 enable
[RT3-GigabitEthernet2/0/0] ipv6 address fc00:2::1 64
[RT3-GigabitEthernet2/0/0] quit
[RT3] isis 1
[RT3-isis-1] network-entity 10.0000.0000.0002.00
[RT3-isis-1] ipv6 enable topology standard
[RT3-isis-1] quit
[RT3] interface gigabitethernet 1/0/0
[RT3-GigabitEthernet1/0/0] isis ipv6 enable 1
[RT3-GigabitEthernet1/0/0] quit
[RT3] interface gigabitethernet 2/0/0
[RT3-GigabitEthernet2/0/0] isis ipv6 enable 1
[RT3-GigabitEthernet2/0/0] quit

# Configure RT4.

<Huawei> system-view
[Huawei] sysname RT4
[RT4] ipv6
[RT4] interface gigabitethernet 1/0/0
[RT4-GigabitEthernet1/0/0] ipv6 enable
[RT4-GigabitEthernet1/0/0] ipv6 address fc00:2::2 64
[RT4-GigabitEthernet1/0/0] quit
[RT4] isis 1
[RT4-isis-1] network-entity 10.0000.0000.0003.00
[RT4-isis-1] ipv6 enable topology standard
[RT4-isis-1] quit
[RT4] interface gigabitethernet 1/0/0
[RT4-GigabitEthernet1/0/0] isis ipv6 enable 1
[RT4-GigabitEthernet1/0/0] quit

Configure an IPv4 address for the physical interface and configure OSPF on the IPv4 network to implement IP connectivity of the IPv4 network.

# Configure RT1.

<Huawei> system-view
[Huawei] sysname RT1
[RT1] interface gigabitethernet 1/0/0
[RT1-GigabitEthernet1/0/0] ip address 10.1.2.2 30
[RT1-GigabitEthernet1/0/0] quit
[RT1] ospf 1
[RT1-ospf-1] area 0
[RT1-ospf-1-area-0.0.0.0] network 10.1.2.0 0.0.0.3

# Configure RT2.

[RT2] interface gigabitethernet 1/0/0
[RT2-GigabitEthernet1/0/0] ip address 10.1.2.1 30
[RT2-GigabitEthernet1/0/0] quit
[RT2] ospf 1
[RT2-ospf-1] area 0
[RT2-ospf-1-area-0.0.0.0] network 10.1.2.0 0.0.0.3

# Configure RT4.

[RT4] interface gigabitethernet 2/0/0
[RT4-GigabitEthernet2/0/0] ip address 10.1.3.1 30
[RT4-GigabitEthernet2/0/0] quit
[RT4] ospf 1
[RT4-ospf-1] area 0
[RT4-ospf-1-area-0.0.0.0] network 10.1.3.0 0.0.0.3

# Configure RT5.

<Huawei> system-view
[Huawei] sysname RT5
[RT5] interface gigabitethernet 1/0/0
[RT5-GigabitEthernet1/0/0] ip address 10.1.3.2 30
[RT5-GigabitEthernet1/0/0] quit
[RT5] ospf 1
[RT5-ospf-1] area 0
[RT5-ospf-1-area-0.0.0.0] network 10.1.3.0 0.0.0.3

Configure a tunnel interface.

# Create a tunnel interface, and configure an IPv4 address, a source IPv6 address (or source interface), and a destination IPv6 address for the tunnel interface.

# Configure RT2.

[RT2] interface tunnel 0/0/2
[RT2-Tunnel0/0/2] tunnel-protocol ipv4-ipv6
[RT2-Tunnel0/0/2] undo tunnel ipv4-ipv6 encapsulation-limit
[RT2-Tunnel0/0/2] ip address 10.1.1.1 30
[RT2-Tunnel0/0/2] source gigabitethernet 2/0/0
[ET2-Tunnel0/0/2] destination fc00:2::2

# Configure RT4.

[RT4] interface tunnel 0/0/1
[RT4-Tunnel0/0/1] tunnel-protocol ipv4-ipv6
[RT4-Tunnel0/0/1] undo tunnel ipv4-ipv6 encapsulation-limit
[RT4-Tunnel0/0/1] ip address 10.1.1.2 30
[RT4-Tunnel0/0/1] source gigabitethernet 1/0/0
[ET4-Tunnel0/0/1] destination fc00:1::1

Use a dynamic routing protocol to configure a route for the tunnel interface to forward packets.

# Configure RT2.

[RT2] ospf 1
[RT2-ospf-1] area 0
[RT2-ospf-1-area-0.0.0.0] network 10.1.1.0 0.0.0.3
[RT2-ospf-1-area-0.0.0.0] quit
[RT2-ospf-1] quit

# Configure RT4.

[RT4] ospf 1
[RT4-ospf-1] area 0
[RT4-ospf-1-area-0.0.0.0] network 10.1.1.0 0.0.0.3

Verify the configuration.

# After the preceding configurations are complete, check the tunnel interface status on RT2 and RT4. You can see that the protocol status of the tunnel interface is Up.

[RT2] display interface tunnel 0/0/2
Tunnel0/0/2 current state : UP
Line protocol current state : UP
Last line protocol up time: 2010-06-22, 19:33:19
Description : HUAWEI, AR Series, Tunnel0/0/2 Interface
Route Port,The Maximum Transmit Unit is 1500
Internet Address is 10.1.1.1/30
Encapsulation is TUNNEL6, loopback not set
Tunnel protocol/transport (IPv6 or IPv4) over IPv6
Tunnel Source fc00:1::1 (GigabitEthernet2/0/0)
Tunnel Destination fc00:2::2
Tunnel Encapsulation limit 4
Tunnel Traffic class not set
Tunnel Flow label not set
Tunnel Hop limit 64
Current system time: 2012-09-05 10:28:33                                        
    300 seconds input rate 0 bits/sec, 0 packets/sec                            
    300 seconds output rate 0 bits/sec, 0 packets/sec                           
    102 seconds input rate 0 bits/sec, 0 packets/sec                            
    102 seconds output rate 0 bits/sec, 0 packets/sec                           
    0 packets input,  0 bytes                                                   
    0 input error                                                               
    0 packets output,  0 bytes                                                  
    0 output error                                                              
    Input bandwidth utilization  : --                                           
    Output bandwidth utilization : --

# Check the IPv4 routing table on RT2 and RT4. You can see that the outbound interface of the route to the remote IPv4 network is a tunnel interface.

[RT2] display ip routing-table
Routing Tables: Public
         Destinations : 9        Routes : 9
Destination/Mask    Proto  Pre  Cost       NextHop         Interface
        1.1.1.1/32  Direct 0    0          127.0.0.1       InLoopBack0
       10.1.1.0/30  Direct 0    0          10.1.1.1        Tunnel0/0/2
       10.1.1.1/32  Direct 0    0          127.0.0.1       Tunnel2/0/0
       10.1.2.0/30  Direct 0    0          10.1.2.1        GigabitEthernet1/0/0
       10.1.2.1/32  Direct 0    0          127.0.0.1       GigabitEthernet1/0/0
       10.1.2.2/32  Direct 0    0          10.1.2.2        GigabitEthernet1/0/0
       10.1.3.0/24  OSPF   10   2           10.1.1.2        Tunnel0/0/2
      127.0.0.0/8   Direct 0    0          127.0.0.1       InLoopBack0
      127.0.0.1/32  Direct 0    0          127.0.0.1       InLoopBack0

# RT1 and RT5 can ping each other.

Configuration Files

Configuration file of RT1

#
 sysname RT1
#
interface GigabitEthernet1/0/0
 ip address 10.1.2.2 255.255.255.252
#
ospf 1
 area 0.0.0.0
  network 10.1.2.0 0.0.0.3
#
return

Configuration file of RT2

#
 sysname RT2
#
ipv6
#
isis 1
 network-entity 10.0000.0000.0001.00
 #
  ipv6 enable topology standard
 #
#
interface GigabitEthernet1/0/0
 ip address 10.1.2.1 255.255.255.252
#
interface GigabitEthernet2/0/0
 ipv6 enable
 ipv6 address fc00:1::1/64
isis ipv6 enable 1
#
interface Tunnel0/0/2
 ip address 10.1.1.1 255.255.255.252
 tunnel-protocol ipv4-ipv6
 undo tunnel ipv4-ipv6 encapsulation-limit
 source  GigabitEthernet2/0/0
 destination  fc00:2::2
#
ospf 1
 area 0.0.0.0
  network 10.1.2.0 0.0.0.3
  network 10.1.1.0 0.0.0.3
#
return

Configuration file of RT3

#
 sysname RT3
#
ipv6
#
isis 1
 network-entity 10.0000.0000.0002.00
 #
  ipv6 enable topology standard
 #
#
interface GigabitEthernet1/0/0
 ivp6 enable
 ipv6 address fc00:1::2/64
 isis ipv6 enable 1
#
interface GigabitEthernet2/0/0
 ipv6 enable
 ipv6 address fc00:2::1/64
 isis ipv6 enable 1
#
return

Configuration file of RT4

#
 sysname RT4
#
ipv6
#
isis 1
 network-entity 10.0000.0000.0003.00
 #
  ipv6 enable topology standard
 #
#
interface GigabitEthernet1/0/0
 ipv6 enable
 ipv6 address fc00:2::2/64
 isis ipv6 enable 1
#
interface GigabitEthernet2/0/0
 ip address 10.1.3.1 255.255.255.252
#
interface Tunnel0/0/1
 ip address 10.1.1.2 255.255.255.252
 tunnel-protocol ipv4-ipv6
 undo tunnel ipv4-ipv6 encapsulation-limit
 source  GigabitEthernet1/0/0
 destination  fc00:1::1
#
ospf 1
 area 0.0.0.0
  network 10.1.1.0 0.0.0.3
  network 10.1.3.0 0.0.0.3
#
return

Configuration file of RT5

#
 sysname RT1
#
interface GigabitEthernet1/0/0
 ip address 10.1.3.2 255.255.255.252
#
ospf 1
 area 0.0.0.0
  network 10.1.3.0 0.0.0.3
#
return

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Updated: 2023-05-18

Document ID: EDOC1100112351

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