H3C S12500R Switch Router Series
IPv6 over IPv4 Tunneling with OSPFv3 Configuration Examples

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

The information in this document is subject to change without notice.

Contents

Introduction· 1

Prerequisites· 1

Example: Configuring IPv6 over IPv4 tunneling with OSPFv3· 1

Network configuration· 1

Software versions used· 2

Restrictions and guidelines· 2

Procedures· 2

Configuring IPv6 over IPv4 tunnels· 2

Configuring OSPFv3· 4

Verifying the configuration· 5

Configuration files· 6

Related documentation· 7

 

Introduction

This document provides IPv6 over IPv4 tunneling with OSPFv3 configuration examples.

Prerequisites

The configuration examples in this document were created and verified in a lab environment, and all the devices were started with the factory default configuration. When you are working on a live network, make sure you understand the potential impact of every command on your network.

This document assumes that you have basic knowledge of IPv6 over IPv4 tunneling and OSPFv3.

Example: Configuring IPv6 over IPv4 tunneling with OSPFv3

Network configuration

As shown in Figure 1, in IPv6 networks, Device A, Device B, and Device C act as the gateways of the headquarters, Branch 1, and Branch 2, respectively.

Configure IPv6 over IPv4 tunnels to ensure that the headquarters can communicate with the two branches over IPv4 networks.

Configure OSPFv3 on the gateways to ensure the following:

·     The gateways have routes to destination IPv6 addresses through tunnel interfaces.

·     Branch 1 and Branch 2 can communicate with each other through the headquarters.

Figure 1 Network diagram

 

Table 1 Interface and IP address assignment

Device	Interface	IP address
Device A	HGE1/0/1	20.1.1.1/24
	HGE1/0/2	2001::1/64
	Tunnel1	3001::1/64
	Tunnel2	4001::1/64
Device B	HGE1/0/1	30.1.1.1/24
	HGE1/0/2	5001::1/64
	Tunnel1	3001::2/64
Device C	HGE1/0/1	40.1.1.1/24
	HGE1/0/2	6001::1/64
	Tunnel2	4001::2/64

 

Software versions used

This configuration example was created and verified on Release 3606.

Restrictions and guidelines

For tunnel interfaces to send and receive packets, you must configure a tunnel-type service loopback group.

On the device, a tunneled packet cannot be directly routed based on its destination address. It is sent to a tunnel-type service loopback group, which then delivers the packet to the forwarding module for Layer 3 forwarding.

By default, interfaces on the device are disabled (in ADM or Administratively Down state). To have an interface operate, you must use the undo shutdown command to enable that interface.

Procedures

Make sure the gateways can reach each other at IPv4.

Configuring IPv6 over IPv4 tunnels

·     Configure Device A:

# Configure an IP address for HundredGigE 1/0/1.

<DeviceA> system-view

[DeviceA] interface hundredgige 1/0/1

[DeviceA-HundredGigE1/0/1] ip address 20.1.1.1 24

[DeviceA-HundredGigE1/0/1] quit

# Configure IP addresses for other interfaces, as shown in Figure 1. (Details not shown.)

# Create service loopback group 1, and specify its service type as tunnel.

[DeviceA] service-loopback group 1 type tunnel

# Assign HundredGigE 1/0/3 to service loopback group 1.

[DeviceA] interface hundredgige 1/0/3

[DeviceA-HundredGigE1/0/3] port link-mode bridge

[DeviceA-HundredGigE1/0/3] port service-loopback group 1

[DeviceA-HundredGigE1/0/3] quit

# Configure an IPv6 over IPv4 tunnel interface Tunnel 1.

[DeviceA] interface tunnel 1 mode ipv6-ipv4

# Configure an IPv6 address for Tunnel 1.

[DeviceA-Tunnel1] ipv6 address 3001::1/64

# Specify HundredGigE 1/0/1 as the source interface of Tunnel 1.

[DeviceA-Tunnel1] source hundredgige 1/0/1

# Specify the destination address for Tunnel 1.

[DeviceA-Tunnel1] destination 30.1.1.1

[DeviceA-Tunnel1] quit

# Configure an IPv6 over IPv4 tunnel interface Tunnel 2.

[DeviceA] interface tunnel 2 mode ipv6-ipv4

# Configure an IPv6 address for Tunnel 2.

[DeviceA-Tunnel2] ipv6 address 4001::1/64

# Specify HundredGigE 1/0/1 as the source interface of Tunnel 2.

[DeviceA-Tunnel2] source hundredgige 1/0/1

# Specify the destination address for Tunnel 2.

[DeviceA-Tunnel2] destination 40.1.1.1

[DeviceA-Tunnel2] quit

·     Configure Device B:

# Configure an IP address for HundredGigE 1/0/1.

<DeviceB> system-view

[DeviceB] interface hundredgige 1/0/1

[DeviceB-HundredGigE1/0/1] ip address 30.1.1.1 24

[DeviceB-HundredGigE1/0/1] quit

# Configure IP addresses for other interfaces, as shown in Figure 1. (Details not shown.)

# Create service loopback group 1, and specify its service type as tunnel.

[DeviceB] service-loopback group 1 type tunnel

# Assign HundredGigE 1/0/3 to service loopback group 1.

[DeviceB] interface hundredgige 1/0/3

[DeviceB-HundredGigE1/0/3] port link-mode bridge

[DeviceB-HundredGigE1/0/3] port service-loopback group 1

[DeviceB-HundredGigE1/0/3] quit

# Configure an IPv6 over IPv4 tunnel interface Tunnel 1.

[DeviceB] interface tunnel 1 mode ipv6-ipv4

# Configure an IPv6 address for Tunnel 1.

[DeviceB-Tunnel1] ipv6 address 3001::2/64

# Specify HundredGigE 1/0/1 as the source interface of Tunnel 1.

[DeviceB-Tunnel1] source hundredgige 1/0/1

# Specify the destination address for Tunnel 1.

[DeviceB-Tunnel1] destination 20.1.1.1

[DeviceB-Tunnel1] quit

·     Configure Device C:

# Configure an IP address for HundredGigE 1/0/1.

<DeviceC> system-view

[DeviceC] interface hundredgige 1/0/1

[DeviceC-HundredGigE1/0/1] ip address 40.1.1.1 24

[DeviceC-HundredGigE1/0/1] quit

# Configure IP addresses for other interfaces, as shown in Figure 1. (Details not shown.)

# Create service loopback group 1, and specify its service type as tunnel.

[DeviceC] service-loopback group 1 type tunnel

# Assign HundredGigE 1/0/3 to service loopback group 1.

[DeviceC] interface hundredgige 1/0/3

[DeviceC-HundredGigE1/0/3] port link-mode bridge

[DeviceC-HundredGigE1/0/3] port service-loopback group 1

[DeviceC-HundredGigE1/0/3] quit

# Configure an IPv6 over IPv4 tunnel interface Tunnel 2.

[DeviceC] interface tunnel 2 mode ipv6-ipv4

# Configure an IPv6 address for Tunnel 2.

[DeviceC-Tunnel2] ipv6 address 4001::2/64

# Specify HundredGigE 1/0/1 as the source interface of Tunnel 2.

[DeviceC-Tunnel2] source hundredgige 1/0/1

# Specify the destination address for Tunnel 2.

[DeviceC-Tunnel2] destination 20.1.1.1

[DeviceC-Tunnel2] quit

Configuring OSPFv3

·     Configure Device A:

# Specify the router ID as 1.1.1.1.

[DeviceA] ospfv3

[DeviceA-ospfv3-1] router-id 1.1.1.1

[DeviceA-ospfv3-1] quit

# Enable OSPFv3 on Tunnel 1.

[DeviceA] interface Tunnel 1

[DeviceA-Tunnel1] ospfv3 1 area 0

[DeviceA-Tunnel1] quit

# Enable OSPFv3 on Tunnel 2.

[DeviceA] interface Tunnel 2

[DeviceA-Tunnel2] ospfv3 1 area 0

[DeviceA-Tunnel2] quit

# Enable OSPFv3 on HundredGigE 1/0/2.

[DeviceA] interface hundredgige 1/0/2

[DeviceA-HundredGigE1/0/2] ospfv3 1 area 0

[DeviceA-HundredGigE1/0/2] quit

·     Configure Device B:

# Specify the router ID as 2.2.2.2.

[DeviceB] ospfv3

[DeviceB-ospfv3-1] router-id 2.2.2.2

[DeviceB-ospfv3-1] quit

# Enable OSPFv3 on Tunnel 1.

[DeviceB] interface Tunnel 1

[DeviceB-Tunnel1] ospfv3 1 area 0

[DeviceB-Tunnel1] quit

# Enable OSPFv3 on HundredGigE 1/0/2.

[DeviceB] interface hundredgige 1/0/2

[DeviceB-HundredGigE1/0/2] ospfv3 1 area 0

[DeviceB-HundredGigE1/0/2] quit

·     Configure Device C:

# Specify the router ID as 3.3.3.3.

[DeviceC] ospfv3

[DeviceC-ospfv3-1] router-id 3.3.3.3

[DeviceC-ospfv3-1] quit

# Enable OSPFv3 on Tunnel 2.

[DeviceC] interface Tunnel 2

[DeviceC-Tunnel2] ospfv3 1 area 0

[DeviceC-Tunnel2] quit

# Enable OSPFv3 on HundredGigE 1/0/2.

[DeviceC] interface hundredgige 1/0/2

[DeviceC-HundredGigE1/0/2] ospfv3 1 area 0

[DeviceC-HundredGigE1/0/2] quit

Verifying the configuration

# Ping PC 1 from PC 2.

D:\>ping6 -s 5001::3 2001::3

 

Pinging 2001::3

from 5001::3 with 32 bytes of data:

 

Reply from 2001::3: bytes=32 time=13ms

Reply from 2001::3: bytes=32 time=1ms

Reply from 2001::3: bytes=32 time=1ms

Reply from 2001::3: bytes=32 time<1ms

 

Ping statistics for 2001::3:

    Packets: Sent = 4, Received = 4, Lost = 0 (0% loss),

Approximate round trip times in milli-seconds:

Minimum = 0ms, Maximum = 13ms, Average = 3ms

The output shows that the ping operation succeeds.

# Ping PC 3 from PC 2.

D:\>ping6 -s 5001::3 6001::3

 

Pinging 6001::3

from 6001::3 with 32 bytes of data:

 

Reply from 6001::3: bytes=32 time=13ms

Reply from 6001::3: bytes=32 time=1ms

Reply from 6001::3: bytes=32 time=1ms

Reply from 6001::3: bytes=32 time<1ms

 

Ping statistics for 6001::3:

    Packets: Sent = 4, Received = 4, Lost = 0 (0% loss),

Approximate round trip times in milli-seconds:

Minimum = 0ms, Maximum = 13ms, Average = 3ms

The output shows that the ping operation succeeds.

Configuration files

·     Device A:

#

 service-loopback group 1 type tunnel

#

ospfv3 1

 router-id 1.1.1.1

 area 0.0.0.0

#

interface HundredGigE1/0/1

 ip address 20.1.1.1 255.255.255.0

#

interface HundredGigE1/0/2

 ospfv3 1 area 0.0.0.0

 ipv6 address 2001::1/64

#

interface HundredGigE1/0/3

 port link-mode bridge

 port service-loopback group 1

#

interface Tunnel1 mode ipv6-ipv4

 ospfv3 1 area 0.0.0.0

 source HundredGigE1/0/1

 destination 30.1.1.1

 ipv6 address 3001::1/64

#

interface Tunnel2 mode ipv6-ipv4

 ospfv3 1 area 0.0.0.0

 source HundredGigE1/0/1

 destination 40.1.1.1

 ipv6 address 4001::1/64

#

·     Device B:

#

 service-loopback group 1 type tunnel

#

ospfv3 1

 router-id 2.2.2.2

 area 0.0.0.0

#

interface HundredGigE1/0/1

 ip address 30.1.1.1 255.255.255.0

#

interface HundredGigE1/0/2

 ospfv3 1 area 0.0.0.0

 ipv6 address 5001::1/64

#

interface HundredGigE1/0/3

 port link-mode bridge

 port service-loopback group 1

#

interface Tunnel1 mode ipv6-ipv4

 ospfv3 1 area 0.0.0.0

 source HundredGigE1/0/1

 destination 20.1.1.1

 ipv6 address 3001::2/64

#

·     Device C:

#

 service-loopback group 1 type tunnel

#

ospfv3 1

 router-id 3.3.3.3

 area 0.0.0.0

#

interface HundredGigE1/0/1

 ip address 40.1.1.1 255.255.255.0

#

interface HundredGigE1/0/2

 ospfv3 1 area 0.0.0.0

 ipv6 address 6001::1/64

#

interface HundredGigE1/0/3

 port link-mode bridge

 port service-loopback group 1

#

interface Tunnel2 mode ipv6-ipv4

 ospfv3 1 area 0.0.0.0

 source HundredGigE1/0/1

 destination 20.1.1.1

 ipv6 address 4001::2/64

#

Related documentation

·     H3C S12500R Switch Router Series Layer 3—IP Routing Command Reference-R3606

·     H3C S12500R Switch Router Series Layer 3—IP Routing Configuration Guide-R3606

·     H3C S12500R Switch Router Series Layer 3—IP Services Command Reference-R3606

·     H3C S12500R Switch Router Series Layer 3—IP Services Configuration Guide-R3606