Configuration example

As shown in Figure 125, dual-stack routers Router A and Router B communicate over an IPv4 network. Configure an automatic IPv4-compatible IPv6 tunnel between the two routers to enable IPv6 communications over the IPv4 network.

Make sure Router A and Router B can reach each other through IPv4.

• Configure Router A:

  # Specify an IPv4 address for GigabitEthernet 1/0/1.

  <RouterA> system-view
  [RouterA] interface gigabitethernet 1/0/1
  [RouterA-GigabitEthernet1/0/1] ip address 192.168.100.1 255.255.255.0
  [RouterA-GigabitEthernet1/0/1] quit
  

  # Create an automatic IPv4-compatible IPv6 tunnel.

  [RouterA] interface tunnel 0 mode ipv6-ipv4 auto-tunnel
  

  # Specify an IPv4-compatible IPv6 address for the tunnel interface.

  [RouterA-Tunnel0] ipv6 address ::192.168.100.1/96
  

  # Specify GigabitEthernet 1/0/1 as the source interface of the tunnel interface.

  [RouterA-Tunnel0] source gigabitethernet 1/0/1
  

• Configure Router B:

  # Specify an IPv4 address for GigabitEthernet 1/0/1.

  <RouterB> system-view
  [RouterB] interface gigabitethernet 1/0/1
  [RouterB-GigabitEthernet1/0/1] ip address 192.168.50.1 255.255.255.0
  [RouterB-GigabitEthernet1/0/1] quit
  

  # Create an automatic IPv4-compatible IPv6 tunnel.

  [RouterB] interface tunnel 0 mode ipv6-ipv4 auto-tunnel
  

  # Specify an IPv4-compatible IPv6 address for the tunnel interface.

  [RouterB-Tunnel0] ipv6 address ::192.168.50.1/96
  

  # Specify GigabitEthernet 1/0/1 as the source interface of the tunnel interface.

  [RouterB-Tunnel0] source gigabitethernet 1/0/1
  

# Use the display ipv6 interface command to display tunnel interface status on Router A and Router B. Verify that the interface tunnel 0 is up. (Details not shown.)

# Verify that Router B and Router A can ping the IPv4-compatible IPv6 address of each other. This example uses Router A.

[RouterA-Tunnel0] ping ipv6 ::192.168.50.1
Ping6(56 data bytes) ::192.168.100.1 --> ::192.168.50.1, press CTRL_C to break
56 bytes from ::192.168.50.1, icmp_seq=0 hlim=64 time=17.000 ms
56 bytes from ::192.168.50.1, icmp_seq=1 hlim=64 time=9.000 ms
56 bytes from ::192.168.50.1, icmp_seq=2 hlim=64 time=11.000 ms
56 bytes from ::192.168.50.1, icmp_seq=3 hlim=64 time=9.000 ms
56 bytes from ::192.168.50.1, icmp_seq=4 hlim=64 time=11.000 ms

--- Ping6 statistics for ::192.168.50.1 ---
5 packet(s) transmitted, 5 packet(s) received, 0.0% packet loss
round-trip min/avg/max/std-dev = 9.000/11.400/17.000/2.939 ms