[ 4439.414161][T22356] gre: GRE over IPv4 demultiplexor driver
[ 4441.516469][T22379] ip_gre: GRE over IPv4 tunneling driver
[ 4503.356102][T22951] ip6_gre: GRE over IPv6 tunneling driver
[ 4530.161479][T23200] ping (23200) used greatest stack depth: 21720 bytes left
[ 4545.996185][    C1] ip6_tunnel: tep0 xmit: Local address not yet configured!
[ 4552.077090][    C2] ip6_tunnel: tep0 xmit: Local address not yet configured!
[ 4557.132098][    C2] ip6_tunnel: tep0 xmit: Local address not yet configured!
[ 4563.148123][    C2] ip6_tunnel: tep0 xmit: Local address not yet configured!