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I've got problem with configuration 6to4 on virtual machines. I've got two machines with ubuntu.

Conf. of first machine:

#ip tunnel del tun6to4                     
#ip tunnel add tun6to4 mode sit ttl 64 remote any local 150.254.34.1
#ip link set dev tun6to4 up
#ip -6 addr add 2002:a02d:1701::1/16 dev tun6to4

Conf. of second machine:

# ip tunnel del tun6to4                   
#ip tunnel add tun6to4 mode sit ttl 64 remote any local 160.45.23.1
#ip link set dev tun6to4 up
#ip -6 addr add 2002:96fe:2201:1/16 dev tun6to4

I try ping machines: ping 160.45.23.1 on first machine and ping 150.254.34.1 on second and thera is no connection between.

What is the reason?

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  • If you can't ping IPv4 addresses, you have an IPv4 problem. Check addresses, masks, gateway and firewall.
    – Turbo J
    May 4, 2011 at 20:09

1 Answer 1

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This is my address:

first machine:

ip addr
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 16436 qdisc noqueue state UNKNOWN 
link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
inet 127.0.0.1/8 scope host lo
inet6 ::1/128 scope host 
   valid_lft forever preferred_lft forever
2: eth0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP qlen 1000
link/ether 08:00:27:86:4b:84 brd ff:ff:ff:ff:ff:ff
inet 192.168.100.22/24 brd 192.168.100.255 scope global eth0
inet6 fe80::a00:27ff:fe86:4b84/64 scope link 
   valid_lft forever preferred_lft forever
3: eth1: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP qlen 1000
link/ether 08:00:27:00:3f:ba brd ff:ff:ff:ff:ff:ff
inet 192.168.100.20/24 brd 192.168.100.255 scope global eth1
inet6 fe80::a00:27ff:fe00:3fba/64 scope link 
   valid_lft forever preferred_lft forever
4: eth2: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP qlen 1000
link/ether 08:00:27:c0:93:ab brd ff:ff:ff:ff:ff:ff
inet6 fe80::a00:27ff:fec0:93ab/64 scope link 
   valid_lft forever preferred_lft forever
5: sit0: <NOARP> mtu 1480 qdisc noop state DOWN 
link/sit 0.0.0.0 brd 0.0.0.0
7: tun6to4: <NOARP,UP,LOWER_UP> mtu 1480 qdisc noqueue state UNKNOWN 
link/sit 150.254.34.1 brd 0.0.0.0
inet6 2002:a02d:1701::1/16 scope global 
   valid_lft forever preferred_lft forever
inet6 ::150.254.34.1/128 scope global 
   valid_lft forever preferred_lft forever

second machine:

 ip addr
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 16436 qdisc noqueue state UNKNOWN 
link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
inet 127.0.0.1/8 scope host lo
inet6 ::1/128 scope host 
   valid_lft forever preferred_lft forever
2: eth0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP qlen 1000
link/ether 08:00:27:bf:3f:29 brd ff:ff:ff:ff:ff:ff
inet 192.168.100.26/24 brd 192.168.100.255 scope global eth0
inet6 fe80::a00:27ff:febf:3f29/64 scope link 
   valid_lft forever preferred_lft forever
3: eth1: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP qlen 1000
link/ether 08:00:27:75:71:01 brd ff:ff:ff:ff:ff:ff
inet 192.168.100.27/24 brd 192.168.100.255 scope global eth1
inet6 fe80::a00:27ff:fe75:7101/64 scope link 
   valid_lft forever preferred_lft forever
4: sit0: <NOARP> mtu 1480 qdisc noop state DOWN 
link/sit 0.0.0.0 brd 0.0.0.0
5: tun6to4: <NOARP,UP,LOWER_UP> mtu 1480 qdisc noqueue state UNKNOWN 
link/sit 160.45.23.1 brd 0.0.0.0
inet6 2002:96fe:2201::1/16 scope global 
   valid_lft forever preferred_lft forever
inet6 ::160.45.23.1/128 scope global 
   valid_lft forever preferred_lft forever
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