[  725.730960] gre: GRE over IPv4 demultiplexor driver
[  725.912234] ip_gre: GRE over IPv4 tunneling driver
[  735.485306] ip6_gre: GRE over IPv6 tunneling driver
[  738.294862] ping (4422) used greatest stack depth: 12200 bytes left
[  741.691835] ip6_tunnel: tep0 xmit: Local address not yet configured!
[  743.099867] ip6_tunnel: tep0 xmit: Local address not yet configured!
[  744.443865] ip6_tunnel: tep0 xmit: Local address not yet configured!
[  745.851829] ip6_tunnel: tep0 xmit: Local address not yet configured!
[  757.362973] ip (5588) used greatest stack depth: 12072 bytes left