[ 3722.309642][T26920] gre: GRE over IPv4 demultiplexor driver
[ 3723.764203][T26943] ip_gre: GRE over IPv4 tunneling driver
[ 3742.329231][T27195] ping (27195) used greatest stack depth: 24208 bytes left
[ 3767.425319][T27515] ip6_gre: GRE over IPv6 tunneling driver
[ 3782.590567][T27714] ping (27714) used greatest stack depth: 24048 bytes left
[ 3797.828690][    C1] ip6_tunnel: tep0 xmit: Local address not yet configured!
[ 3802.436623][    C2] ip6_tunnel: tep0 xmit: Local address not yet configured!
[ 3806.340653][    C3] ip6_tunnel: tep0 xmit: Local address not yet configured!
[ 3811.076600][    C2] ip6_tunnel: tep0 xmit: Local address not yet configured!
[ 3873.616121][T28897] ping (28897) used greatest stack depth: 23760 bytes left