[ 1568.318186][T12956] gre: GRE over IPv4 demultiplexer driver
[ 1568.998849][T12979] ip_gre: GRE over IPv4 tunneling driver
[ 1587.472658][T13554] ip6_gre: GRE over IPv6 tunneling driver
[ 1594.123315][T13811] ping (13811) used greatest stack depth: 22704 bytes left
[ 1597.004258][   T24] ip6_tunnel: tep1 xmit: Local address not yet configured!
[ 1600.164060][    C3] ip6_tunnel: tep0 xmit: Local address not yet configured!
[ 1602.213064][    C3] ip6_tunnel: tep0 xmit: Local address not yet configured!
[ 1604.068118][    C1] ip6_tunnel: tep0 xmit: Local address not yet configured!
[ 1606.500075][    C2] ip6_tunnel: tep0 xmit: Local address not yet configured!