[ 1464.107779][T21640] gre: GRE over IPv4 demultiplexer driver
[ 1464.679364][T21663] ip_gre: GRE over IPv4 tunneling driver
[ 1471.026726][T21915] ping (21915) used greatest stack depth: 23944 bytes left
[ 1482.262634][T22235] ip6_gre: GRE over IPv6 tunneling driver
[ 1488.433693][T22484] ping (22484) used greatest stack depth: 23696 bytes left
[ 1490.797978][ T8197] ip6_tunnel: tep1 xmit: Local address not yet configured!
[ 1493.613906][    C2] ip6_tunnel: tep0 xmit: Local address not yet configured!
[ 1495.788957][    C1] ip6_tunnel: tep0 xmit: Local address not yet configured!
[ 1497.709949][    C1] ip6_tunnel: tep0 xmit: Local address not yet configured!
[ 1499.885915][    C2] ip6_tunnel: tep0 xmit: Local address not yet configured!