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Requirements analysis
To enable communication between 6to4 networks, configure 6to4 addresses for 6to4 routers and
hosts in the 6to4 networks.
• The IPv4 address of GigabitEthernet 2/0/2 on Router A is 2.1.1.1/24, and the corresponding
6to4 prefix is 2002:0201:0101::/48. Host A must use this prefix.
• The IPv4 address of GigabitEthernet 2/0/2 on Router B is 5.1.1.1/24, and the corresponding
6to4 prefix is 2002:0501:0101::/48. Host B must use this prefix.
Configuration procedure
Make sure Router A and Router B can reach each other through IPv4.
• Configure Router A:
# Specify an IPv4 address for GigabitEthernet 2/0/2.
<RouterA> system-view
[RouterA] interface gigabitethernet 2/0/2
[RouterA-GigabitEthernet2/0/2] ip address 2.1.1.1 24
[RouterA-GigabitEthernet2/0/2] quit
# Specify a 6to4 address for GigabitEthernet 2/0/1.
[RouterA] interface gigabitethernet 2/0/1
[RouterA-GigabitEthernet2/0/1] ipv6 address 2002:0201:0101:1::1/64
[RouterA-GigabitEthernet2/0/1] quit
# Create the 6to4 tunnel interface Tunnel 0.
[RouterB] interface tunnel 0 mode ipv6-ipv4 6to4
# Specify an IPv6 address for the tunnel interface.
[RouterA-Tunnel0] ipv6 address 3001::1/64
# Specify the source interface as GigabitEthernet 2/0/2 for the tunnel interface.
[RouterA-Tunnel0] source gigabitethernet 2/0/2
[RouterA-Tunnel0] quit
# Configure a static route destined for 2002::/16 through the tunnel interface.
[RouterA] ipv6 route-static 2002:: 16 tunnel 0
• Configure Router B:
# Specify an IPv4 address for GigabitEthernet 2/0/2.
<RouterB> system-view
[RouterB] interface gigabitethernet 2/0/2
[RouterB-GigabitEthernet2/0/2] ip address 5.1.1.1 24
[RouterB-GigabitEthernet2/0/2] quit
# Specify a 6to4 address for GigabitEthernet 2/0/1.
[RouterB] interface gigabitethernet 2/0/1
[RouterB-GigabitEthernet2/0/1] ipv6 address 2002:0501:0101:1::1/64
[RouterB-GigabitEthernet2/0/1] quit
# Create the 6to4 tunnel interface Tunnel 0.
[RouterB] interface tunnel 0 mode ipv6-ipv4 6to4
# Specify an IPv6 address for the tunnel interface.
[RouterB-Tunnel0] ipv6 address 3002::1/64
# Specify the source interface as GigabitEthernet 2/0/2 for the tunnel interface.
[RouterB-Tunnel0] source gigabitethernet 2/0/2
[RouterB-Tunnel0] quit
# Configure a static route destined for 2002::/16 through the tunnel interface.
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