[  727.055666] gre: GRE over IPv4 demultiplexor driver
[  727.223583] ip_gre: GRE over IPv4 tunneling driver
[  736.719566] ip6_gre: GRE over IPv6 tunneling driver
[  739.648807] ping (5592) used greatest stack depth: 12184 bytes left
[  743.039833] ip6_tunnel: tep0 xmit: Local address not yet configured!
[  744.511825] ip6_tunnel: tep0 xmit: Local address not yet configured!
[  745.919829] ip6_tunnel: tep0 xmit: Local address not yet configured!
[  747.391801] ip6_tunnel: tep0 xmit: Local address not yet configured!