[ 3206.301742][T27834] gre: GRE over IPv4 demultiplexor driver
[ 3207.424537][T27857] ip_gre: GRE over IPv4 tunneling driver
[ 3243.137690][T28429] ip6_gre: GRE over IPv6 tunneling driver
[ 3247.524728][T26315] ip6_tunnel: tep1 xmit: Local address not yet configured!
[ 3263.069736][T28780] ping (28780) used greatest stack depth: 22144 bytes left
[ 3267.299367][    C1] ip6_tunnel: tep0 xmit: Local address not yet configured!
[ 3271.011378][    C3] ip6_tunnel: tep0 xmit: Local address not yet configured!
[ 3274.211371][    C2] ip6_tunnel: tep0 xmit: Local address not yet configured!
[ 3277.923370][    C3] ip6_tunnel: tep0 xmit: Local address not yet configured!