Which configuration is used for IP6-over-IP4 tunnels?
A.
set interfaces gr-0/0/0 encapsulation inetv6
set interfaces gr-0/0/0 unit 0 tunnel source 10.0.1.1
set interfaces gr-0/0/0 unit 0 tunnel destination 10.0.0.1
set interfaces gr-0/0/0 unit 0 family inet address fec0:0:1006::1/126
B.
set interfaces gr-0/0/0 unit 0 tunnel source 10.0.1.1
set interfaces gr-0/0/0 unit 0 tunnel destination 10.0.0.1
set interfaces gr-0/0/0 unit 0 family inetv6 address fec0:0:1006::1/126
C.
set interfaces gr-0/0/0 unit 0 tunnel source fec0:0:1006::1/126
set interfaces gr-0/0/0 unit 0 tunnel destination fec0:0:2006::1/126
set interfaces gr-0/0/0 unit 0 family inet address 10.0.0.1
D.
set interfaces gr-0/0/0 unit 0 tunnel source 10.0.1.1
set interfaces gr-0/0/0 unit 0 tunnel destination 10.0.0.1
set interfaces gr-0/0/0 unit 0 family inet6 address fec0:0:1006::1/126
Explanation:
If you have a Tunnel PIC installed in your router, you can configure IPv6-over-IPv4 tunnels. To do this, you configure a unicast tunnel across an existing IPv4 network infrastructure. IPv6 packets are encapsulated in IPv4 headers and sent across the IPv4 infrastructure through the configured tunnel. You manually configure configured tunnels on each end point.
IPv6-over-IPv4 tunnels are defined in RFC 2893, Transition Mechanisms for IPv6 Hosts and Routers.