[ 1622.801089][T13030] gre: GRE over IPv4 demultiplexer driver
[ 1623.312104][T13053] ip_gre: GRE over IPv4 tunneling driver
[ 1640.828905][T13626] ip6_gre: GRE over IPv6 tunneling driver
[ 1646.953318][T13875] ping (13875) used greatest stack depth: 23040 bytes left
[ 1651.982112][    C3] ip6_tunnel: tep0 xmit: Local address not yet configured!
[ 1654.095028][    C2] ip6_tunnel: tep0 xmit: Local address not yet configured!
[ 1656.078038][    C2] ip6_tunnel: tep0 xmit: Local address not yet configured!
[ 1658.446033][    C1] ip6_tunnel: tep0 xmit: Local address not yet configured!