[ 4694.525084][T24633] gre: GRE over IPv4 demultiplexor driver
[ 4696.750569][T24656] ip_gre: GRE over IPv4 tunneling driver
[ 4724.757819][T24909] ping (24909) used greatest stack depth: 22704 bytes left
[ 4760.643872][T25229] ip6_gre: GRE over IPv6 tunneling driver
[ 4788.829120][T25478] ping (25478) used greatest stack depth: 21552 bytes left
[ 4805.237296][    C2] ip6_tunnel: tep0 xmit: Local address not yet configured!
[ 4811.380209][    C1] ip6_tunnel: tep0 xmit: Local address not yet configured!
[ 4816.629261][    C1] ip6_tunnel: tep0 xmit: Local address not yet configured!
[ 4822.836240][    C2] ip6_tunnel: tep0 xmit: Local address not yet configured!