[ 4156.301022][T21171] gre: GRE over IPv4 demultiplexor driver
[ 4157.926667][T21194] ip_gre: GRE over IPv4 tunneling driver
[ 4205.944136][T21767] ip6_gre: GRE over IPv6 tunneling driver
[ 4233.439383][T22110] ping (22110) used greatest stack depth: 22416 bytes left
[ 4238.544297][    C2] ip6_tunnel: tep0 xmit: Local address not yet configured!
[ 4243.343199][    C3] ip6_tunnel: tep0 xmit: Local address not yet configured!
[ 4247.504197][    C1] ip6_tunnel: tep0 xmit: Local address not yet configured!
[ 4252.303220][    C1] ip6_tunnel: tep0 xmit: Local address not yet configured!