[ 4683.642118][T24694] gre: GRE over IPv4 demultiplexor driver
[ 4685.883855][T24717] ip_gre: GRE over IPv4 tunneling driver
[ 4749.365224][T25289] ip6_gre: GRE over IPv6 tunneling driver
[ 4777.623065][T25539] ping (25539) used greatest stack depth: 23328 bytes left
[ 4794.228665][    C2] ip6_tunnel: tep0 xmit: Local address not yet configured!
[ 4800.372585][    C1] ip6_tunnel: tep0 xmit: Local address not yet configured!
[ 4805.685571][    C1] ip6_tunnel: tep0 xmit: Local address not yet configured!
[ 4811.764561][    C3] ip6_tunnel: tep0 xmit: Local address not yet configured!