[ 1505.627265][  T876] gre: GRE over IPv4 demultiplexer driver
[ 1506.051944][  T899] ip_gre: GRE over IPv4 tunneling driver
[ 1521.503119][ T1470] ip6_gre: GRE over IPv6 tunneling driver
[ 1527.854902][ T1763] ping (1763) used greatest stack depth: 23248 bytes left
[ 1531.793859][    C2] ip6_tunnel: tep0 xmit: Local address not yet configured!
[ 1533.778818][    C3] ip6_tunnel: tep0 xmit: Local address not yet configured!
[ 1535.634823][    C2] ip6_tunnel: tep0 xmit: Local address not yet configured!
[ 1537.618824][    C2] ip6_tunnel: tep0 xmit: Local address not yet configured!