[ 1507.405381][T19537] gre: GRE over IPv4 demultiplexer driver
[ 1507.977268][T19560] ip_gre: GRE over IPv4 tunneling driver
[ 1526.756883][T20131] ip6_gre: GRE over IPv6 tunneling driver
[ 1533.680248][T20380] ping (20380) used greatest stack depth: 23072 bytes left
[ 1539.179685][    C1] ip6_tunnel: tep0 xmit: Local address not yet configured!
[ 1541.483722][    C1] ip6_tunnel: tep0 xmit: Local address not yet configured!
[ 1543.532638][    C3] ip6_tunnel: tep0 xmit: Local address not yet configured!
[ 1545.899694][    C0] ip6_tunnel: tep0 xmit: Local address not yet configured!