[ 4409.262415][T29663] gre: GRE over IPv4 demultiplexer driver
[ 4410.990054][T29686] ip_gre: GRE over IPv4 tunneling driver
[ 4461.077860][T30265] ip6_gre: GRE over IPv6 tunneling driver
[ 4489.958318][T30609] ping (30609) used greatest stack depth: 23440 bytes left
[ 4495.194867][    C2] ip6_tunnel: tep0 xmit: Local address not yet configured!
[ 4500.186768][    C3] ip6_tunnel: tep0 xmit: Local address not yet configured!
[ 4504.474750][    C1] ip6_tunnel: tep0 xmit: Local address not yet configured!
[ 4509.466743][    C3] ip6_tunnel: tep0 xmit: Local address not yet configured!
[ 4688.809188][  T408] ping (408) used greatest stack depth: 23280 bytes left