Configure the IPv6 over IPv4 Manual Tunnel

Configuration Conditions

Before configuring the IPv6 over IPv4 manual tunnel, complete the following tasks:

Configure the IP address of the physical interface, making the neighboring nodes reachable at the network layer.
Create one tunnel interface, and configure the basic parameters (refer to the configuration manual of the tunnel interface).
Configure any unicast routing protocol, making the route at the two ends of the tunnel reachable.

Table 11-3 Configure IPv6 over IPv4 manual tunnel

Step		Command	Description
Enter the global configuration mode		configure terminal	-
Enter the tunnel configuration mode		interface tunnel tunnel-number	-
Configure the tunnel interface address	Configure IPv6 global unicast address or anycast address or the local address of the site or auto get address	ipv6 address { ipv6-address/prefix-length [ anycast \| eui-64 ] \| autoconfig }	Mandatory By default, do not configure the IPv6 address on the tunnel interface.
	Configure the local address of the IPv6 link	ipv6 address ipv6-address link-local	Optional By default, after enabling the IPv6 on the interface, automatically generate the local address of the link.
Configure the tunnel interface mode as the IPv6 over IPv4 manual tunnel		tunnel mode ipv6ip	Mandatory By default, the tunnel interface mode is GRE over IPv4.
Configure the source address or interface name of the tunnel interface		tunnel source { ip-address \| interface-name }	Mandatory By default, do not configure the source address or interface name on the tunnel interface.
Configure the destination address or host name of the tunnel interface		tunnel destination { ip-address \| hostname }	Mandatory By default, do not configure the destination address or host name on the tunnel interface.

The source address and destination address must be configured at both ends of the tunnel, and the addresses of the two ends are mutually the source address and destination address.
If adopting the interface mode when configuring the tunnel source, the source address of the tunnel is the master address of the source interface.
The two ends of the tunnel should be configured as the same tunnel mode. Otherwise, transmitting via the tunnel fails.
On one device, you cannot configure multiple tunnels whose tunnel mode, source address, and destination address are all the same.