[ 4452.545535][T25945] gre: GRE over IPv4 demultiplexor driver
[ 4454.581543][T25968] ip_gre: GRE over IPv4 tunneling driver
[ 4491.203821][T26315] ping (26315) used greatest stack depth: 22400 bytes left
[ 4516.627316][T26542] ip6_gre: GRE over IPv6 tunneling driver
[ 4560.568924][    C3] ip6_tunnel: tep0 xmit: Local address not yet configured!
[ 4566.520838][    C2] ip6_tunnel: tep0 xmit: Local address not yet configured!
[ 4571.640817][    C1] ip6_tunnel: tep0 xmit: Local address not yet configured!
[ 4577.720830][    C2] ip6_tunnel: tep0 xmit: Local address not yet configured!