[ 4263.432077][T29291] gre: GRE over IPv4 demultiplexer driver
[ 4265.030216][T29314] ip_gre: GRE over IPv4 tunneling driver
[ 4313.433840][T29887] ip6_gre: GRE over IPv6 tunneling driver
[ 4334.090685][T30136] ping (30136) used greatest stack depth: 23488 bytes left
[ 4346.665025][    C2] ip6_tunnel: tep0 xmit: Local address not yet configured!
[ 4351.464929][    C1] ip6_tunnel: tep0 xmit: Local address not yet configured!
[ 4355.624952][    C1] ip6_tunnel: tep0 xmit: Local address not yet configured!
[ 4360.488950][    C2] ip6_tunnel: tep0 xmit: Local address not yet configured!