[  451.355408][ T2831] gre: GRE over IPv4 demultiplexor driver
[  453.459178][ T2855] ip_gre: GRE over IPv4 tunneling driver
[  517.246102][ T3433] ip6_gre: GRE over IPv6 tunneling driver
[  544.878482][ T3683] ping (3683) used greatest stack depth: 21848 bytes left
[  561.127228][    C0] ip6_tunnel: tep0 xmit: Local address not yet configured!
[  567.207189][    C1] ip6_tunnel: tep0 xmit: Local address not yet configured!
[  572.328151][    C1] ip6_tunnel: tep0 xmit: Local address not yet configured!
[  578.408203][    C1] ip6_tunnel: tep0 xmit: Local address not yet configured!