[ 3396.328902][T31384] gre: GRE over IPv4 demultiplexor driver
[ 3397.534084][T31409] ip_gre: GRE over IPv4 tunneling driver
[ 3432.174528][T31990] ip6_gre: GRE over IPv6 tunneling driver
[ 3446.484285][T32239] ping (32239) used greatest stack depth: 23296 bytes left
[ 3446.794921][T31385] ip6_tunnel: tep1 xmit: Local address not yet configured!
[ 3452.105587][T31385] ip6_tunnel: tep1 xmit: Local address not yet configured!
[ 3456.010489][    C3] ip6_tunnel: tep0 xmit: Local address not yet configured!
[ 3459.849477][    C2] ip6_tunnel: tep0 xmit: Local address not yet configured!
[ 3463.241494][    C1] ip6_tunnel: tep0 xmit: Local address not yet configured!
[ 3466.953494][    C1] ip6_tunnel: tep0 xmit: Local address not yet configured!
[ 3517.604186][  T903] ping (903) used greatest stack depth: 22656 bytes left