[  721.861799] gre: GRE over IPv4 demultiplexor driver
[  722.065328] ip_gre: GRE over IPv4 tunneling driver
[  732.119418] ip6_gre: GRE over IPv6 tunneling driver
[  734.950592] ping (3442) used greatest stack depth: 12192 bytes left
[  738.364789] ip6_tunnel: tep0 xmit: Local address not yet configured!
[  739.836792] ip6_tunnel: tep0 xmit: Local address not yet configured!
[  741.244786] ip6_tunnel: tep0 xmit: Local address not yet configured!
[  742.716786] ip6_tunnel: tep0 xmit: Local address not yet configured!