[ 3556.028657][T17364] gre: GRE over IPv4 demultiplexor driver
[ 3558.266255][T17394] ip_gre: GRE over IPv4 tunneling driver
[ 3618.551362][T17968] ip6_gre: GRE over IPv6 tunneling driver
[ 3655.262944][T18312] ping (18312) used greatest stack depth: 23360 bytes left
[ 3661.183286][    C0] ip6_tunnel: tep0 xmit: Local address not yet configured!
[ 3667.135177][    C2] ip6_tunnel: tep0 xmit: Local address not yet configured!
[ 3672.128184][    C1] ip6_tunnel: tep0 xmit: Local address not yet configured!
[ 3678.079194][    C0] ip6_tunnel: tep0 xmit: Local address not yet configured!