[ 3317.356806][T23663] gre: GRE over IPv4 demultiplexer driver
[ 3319.262822][T23693] ip_gre: GRE over IPv4 tunneling driver
[ 3368.756898][T24272] ip6_gre: GRE over IPv6 tunneling driver
[ 3397.961486][T24615] ping (24615) used greatest stack depth: 23552 bytes left
[ 3403.194425][    C3] ip6_tunnel: tep0 xmit: Local address not yet configured!
[ 3408.185316][    C2] ip6_tunnel: tep0 xmit: Local address not yet configured!
[ 3412.474296][    C1] ip6_tunnel: tep0 xmit: Local address not yet configured!
[ 3417.465310][    C2] ip6_tunnel: tep0 xmit: Local address not yet configured!