[ 1638.863808][T12656] gre: GRE over IPv4 demultiplexer driver
[ 1639.342065][T12679] ip_gre: GRE over IPv4 tunneling driver
[ 1646.662301][T13037] ping (13037) used greatest stack depth: 23024 bytes left
[ 1654.807961][T13262] ip6_gre: GRE over IPv6 tunneling driver
[ 1664.910122][    C1] ip6_tunnel: tep0 xmit: Local address not yet configured!
[ 1666.894096][    C1] ip6_tunnel: tep0 xmit: Local address not yet configured!
[ 1668.750092][    C2] ip6_tunnel: tep0 xmit: Local address not yet configured!
[ 1670.734098][    C2] ip6_tunnel: tep0 xmit: Local address not yet configured!