[ 1419.182713][  T727] gre: GRE over IPv4 demultiplexer driver
[ 1419.618408][  T750] ip_gre: GRE over IPv4 tunneling driver
[ 1434.942290][ T1321] ip6_gre: GRE over IPv6 tunneling driver
[ 1440.231201][ T1570] ping (1570) used greatest stack depth: 23344 bytes left
[ 1444.929900][    C3] ip6_tunnel: tep0 xmit: Local address not yet configured!
[ 1446.849868][    C2] ip6_tunnel: tep0 xmit: Local address not yet configured!
[ 1448.640868][    C1] ip6_tunnel: tep0 xmit: Local address not yet configured!
[ 1450.625874][    C2] ip6_tunnel: tep0 xmit: Local address not yet configured!