[ 1521.271817][T29395] gre: GRE over IPv4 demultiplexer driver
[ 1521.746489][T29418] ip_gre: GRE over IPv4 tunneling driver
[ 1527.371313][T29672] ping (29672) used greatest stack depth: 23552 bytes left
[ 1537.816568][T29991] ip6_gre: GRE over IPv6 tunneling driver
[ 1548.246934][    C3] ip6_tunnel: tep0 xmit: Local address not yet configured!
[ 1550.231925][    C2] ip6_tunnel: tep0 xmit: Local address not yet configured!
[ 1552.086899][    C3] ip6_tunnel: tep0 xmit: Local address not yet configured!
[ 1554.134911][    C0] ip6_tunnel: tep0 xmit: Local address not yet configured!