[ 1487.570904][ T2393] gre: GRE over IPv4 demultiplexer driver
[ 1488.011261][ T2416] ip_gre: GRE over IPv4 tunneling driver
[ 1503.749022][ T2994] ip6_gre: GRE over IPv6 tunneling driver
[ 1511.150160][ T3339] ping (3339) used greatest stack depth: 22448 bytes left
[ 1513.993830][    C2] ip6_tunnel: tep0 xmit: Local address not yet configured!
[ 1515.977795][    C1] ip6_tunnel: tep0 xmit: Local address not yet configured!
[ 1517.832793][    C3] ip6_tunnel: tep0 xmit: Local address not yet configured!
[ 1519.817792][    C2] ip6_tunnel: tep0 xmit: Local address not yet configured!