[ 2169.093391][T17619] gre: GRE over IPv4 demultiplexor driver
[ 2170.931254][T17642] ip_gre: GRE over IPv4 tunneling driver
[ 2223.873928][T18213] ip6_gre: GRE over IPv6 tunneling driver
[ 2250.955466][T18506] ping (18506) used greatest stack depth: 22304 bytes left
[ 2261.030964][    C1] ip6_tunnel: tep0 xmit: Local address not yet configured!
[ 2266.149884][    C2] ip6_tunnel: tep0 xmit: Local address not yet configured!
[ 2270.693894][    C3] ip6_tunnel: tep0 xmit: Local address not yet configured!
[ 2275.749915][    C1] ip6_tunnel: tep0 xmit: Local address not yet configured!