[ 4650.366291][T25106] gre: GRE over IPv4 demultiplexor driver
[ 4652.537466][T25129] ip_gre: GRE over IPv4 tunneling driver
[ 4717.483120][T25705] ip6_gre: GRE over IPv6 tunneling driver
[ 4746.180242][T25955] ping (25955) used greatest stack depth: 23328 bytes left
[ 4763.001526][    C2] ip6_tunnel: tep0 xmit: Local address not yet configured!
[ 4769.338448][    C1] ip6_tunnel: tep0 xmit: Local address not yet configured!
[ 4774.457465][    C3] ip6_tunnel: tep0 xmit: Local address not yet configured!
[ 4780.602012][    C3] ip6_tunnel: tep0 xmit: Local address not yet configured!