[ 4019.658407][T24606] gre: GRE over IPv4 demultiplexor driver
[ 4021.835782][T24630] ip_gre: GRE over IPv4 tunneling driver
[ 4084.889167][T25203] ip6_gre: GRE over IPv6 tunneling driver
[ 4112.659334][T25453] ping (25453) used greatest stack depth: 23360 bytes left
[ 4128.247625][    C1] ip6_tunnel: tep0 xmit: Local address not yet configured!
[ 4133.177057][T25641] ping (25641) used greatest stack depth: 22920 bytes left
[ 4134.135570][    C2] ip6_tunnel: tep0 xmit: Local address not yet configured!
[ 4139.127555][    C1] ip6_tunnel: tep0 xmit: Local address not yet configured!
[ 4144.952597][    C2] ip6_tunnel: tep0 xmit: Local address not yet configured!