Example for Configuring 6to4 Relay
This section provides an example for configuring 6to4 relay.
Networking Requirements
As shown in Figure 6-3, Device A functions as a 6to4 router and connects to the 6to4 network; Device B is a 6to4 relay router and connects to the IPv6 network (2001::/64); Device A connects to Device B through the IPv4 backbone network. To interconnect the hosts on the 6to4 and IPv6 networks, a 6to4 tunnel between Device A and Device B needs to be established.
The method of configuring a tunnel between a 6to4 relay router and a 6to4 router is the same as the method of configuring a tunnel between 6to4 routers. To interconnect a 6to4 network with an IPv6 network, configure a static route to the IPv6 network on each 6to4 router.
Precautions
When configuring a 6to4 tunnel, note the following points:
Create a tunnel interface and set parameters for the tunnel interface.
Configure only the source IPv4 address of the tunnel. The destination IPv4 address of the tunnel is the same as the destination IPv4 address contained in the original IPv6 packet. The source address of a 6to4 tunnel must be unique.
Assign a 6to4 address to the interface that connects a border router to a 6to4 network and an IPv4 address to the interface that connects a border router to an IPv4 network.
Configure an IP address for the tunnel interface to support routing protocols.
Configuration Roadmap
The configuration roadmap is as follows:
Configure the IPv4/IPv6 dual stack on the routers.
Configure a 6to4 tunnel between router A and router B.
Configure static routes on the routers.
Data Preparation
To complete the configuration, you need the following data:
IPv4 and IPv6 addresses of the interfaces
Source IPv4 address of the tunnel interface
Static routes to indirectly connected router A and router B
Procedure
- Configure Device A.
# Configure the IPv4/IPv6 dual stack.
<HUAWEI> system-view[~HUAWEI] sysname DeviceA
[*HUAWEI] commit
[~DeviceA] interface GigabitEthernet 0/1/0
[~DeviceA-GigabitEthernet0/1/0] ip address 1.1.1.1 255.0.0.0
[*DeviceA-GigabitEthernet0/1/0] undo shutdown
[*DeviceA-GigabitEthernet0/1/0] quit
[*DeviceA] interface gigabitethernet 0/2/0
[*DeviceA-GigabitEthernet0/2/0] ipv6 enable
[*DeviceA-GigabitEthernet0/2/0] ipv6 address 2002:0101:0101:1::1 64
[*DeviceA-GigabitEthernet0/2/0] undo shutdown
[*DeviceA-GigabitEthernet0/2/0] quit
# Configure a 6to4 tunnel.
[*DeviceA] interface Tunnel 10
[*DeviceA-Tunnel10] tunnel-protocol ipv6-ipv4 6to4
[*DeviceA-Tunnel10] ipv6 enable
[*DeviceA-Tunnel10] ipv6 address 2002:0101:0101::1 64
[*DeviceA-Tunnel10] source 1.1.1.1
[*DeviceA-Tunnel10] quit
# Configure a static route to 2002::/16.
[*DeviceA] ipv6 route-static 2002:: 16 Tunnel 10
# Configure a default route to the IPv6 network.
[*DeviceA] ipv6 route-static :: 0 2002:0202:0202::1
[*DeviceA] commit
- Configure Device B.
# Configure the IPv4/IPv6 dual stack.
<HUAWEI> system-view[~HUAWEI] sysname DeviceB
[*HUAWEI] commit
[~DeviceB] interface GigabitEthernet 0/1/0
[~DeviceB-GigabitEthernet0/1/0] ip address 2.2.2.2 255.0.0.0
[*DeviceB-GigabitEthernet0/1/0] undo shutdown
[*DeviceB-GigabitEthernet0/1/0] quit
[*DeviceB] interface gigabitethernet 0/2/0
[*DeviceB-GigabitEthernet0/2/0] ipv6 enable
[*DeviceB-GigabitEthernet0/2/0] ipv6 address 2001:db8::1 64
[*DeviceB-GigabitEthernet0/2/0] undo shutdown
[*DeviceB-GigabitEthernet0/2/0] quit
# Configure a 6to4 tunnel.
[*DeviceB] interface Tunnel 10
[*DeviceB-Tunnel10] tunnel-protocol ipv6-ipv4 6to4
[*DeviceB-Tunnel10] ipv6 enable
[*DeviceB-Tunnel10] ipv6 address 2002:0202:0202::1 64
[*DeviceB-Tunnel10] source 2.2.2.2
[*DeviceB-Tunnel10] quit
# Configure a static route to 2002::/16.
[*DeviceB] ipv6 route-static 2002:: 16 Tunnel 10
[*DeviceB] commit
- Verify the configuration.
# Ping the IPv6 address of GE 0/2/0 on Device B from Device A. The command output shows the ping is successful.
[~DeviceA] ping ipv6 2001:db8::1
PING 2001:db8::1 : 56 data bytes, press CTRL_C to break
Reply from 2001:db8::1
bytes=56 Sequence=1 hop limit=64 time=10 ms
Reply from 2001:db8::1
bytes=56 Sequence=2 hop limit=64 time=2 ms
Reply from 2001:db8::1
bytes=56 Sequence=3 hop limit=64 time=2 ms
Reply from 2001:db8::1
bytes=56 Sequence=4 hop limit=64 time=2 ms
Reply from 2001:db8::1
bytes=56 Sequence=5 hop limit=64 time=2 ms
--- 2001:db8::1 ping statistics ---
5 packet(s) transmitted
5 packet(s) received
0.00% packet loss
round-trip min/avg/max = 5/14/29 ms
Configuration Files
Device A configuration file
#
sysname DeviceA#
admin
interface GigabitEthernet0/1/0undo shutdown
ip address 1.1.1.1 255.0.0.0
#
interface GigabitEthernet0/2/0undo shutdown
ipv6 enable
ipv6 address 2002:101:101:1::1/64
#
interface Tunnel 10
ipv6 enable
ipv6 address 2002:101:101::1/64
tunnel-protocol ipv6-ipv4 6to4
source 1.1.1.1
#
ipv6 route-static :: 0 2002:202:202::1
#
ipv6 route-static 2002:: 16 Tunnel 10
#
return
Device B configuration file
#
sysname DeviceB#
admin
interface GigabitEthernet0/1/0undo shutdown
ip address 2.2.2.2 255.0.0.0
#
interface GigabitEthernet0/2/0undo shutdown
ipv6 enable
ipv6 address 2001:db8::1/64
#
interface Tunnel 10
ipv6 enable
ipv6 address 2002:202:202::1/64
tunnel-protocol ipv6-ipv4 6to4
source 2.2.2.2
#
ipv6 route-static 2002:: 16 Tunnel 10
#
return
