Configuring an IPv6 over IPv4 Tunnel
An IPv6 over IPv4 tunnel connects IPv6 networks through an IPv4 network.
Prerequisites
Source and destination devices of an IPv6 over IPv4 tunnel must have forwarding routes.
Configuration Process
You can perform the following configuration tasks in any sequence according to usage scenarios shown in Table 11-1.
Subcategory |
Tunnel Source/Destination IP Address |
Tunnel Interface IP Address |
Usage Scenario |
|---|---|---|---|
Manual IPv6 over IPv4 tunnel |
Source and destination IP addresses use manually configured IPv4 addresses. |
IPv6 address |
Applies to simple IPv6 networks or point-to-point connections. Only IPv6 packets can be transmitted over the manual IPv6 over IPv4 tunnel. |
IPv6 over IPv4 GRE tunnel |
Source and destination IP addresses use manually configured IPv4 addresses. |
IPv6 address |
Applies to simple IPv6 networks or point-to-point connections. The IPv6 over IPv4 GRE tunnel supports multiple upper-layer protocols including IPv6. |
Automatic IPv6 over IPv4 tunnel |
The source IP address uses a manually configured IPv4 address, and the destination address is automatically generated. |
IPv6 address that is compatible with an IPv4 address in the format of ::IPv4-source-address/96 |
Applies to point-to-multipoint connections of IPv6 hosts. |
6to4 tunnel |
The source IP address uses a manually configured IPv4 address, and the destination address is automatically generated. |
6to4 address in the format of 2002:IPv4-source-address::/48 |
Applies to point-to-multipoint connections on IPv6 networks. |
ISATAP tunnel |
The source IP address uses a manually configured IPv4 address, and the destination address is automatically generated. |
ISATAP address in the format of Prefix:0 |
Applies to connections of IPv6 nodes on an IPv4 network. |