[ 1688.214174][T12589] gre: GRE over IPv4 demultiplexer driver
[ 1688.686167][T12612] ip_gre: GRE over IPv4 tunneling driver
[ 1704.296057][T13187] ip6_gre: GRE over IPv6 tunneling driver
[ 1711.682620][T13530] ping (13530) used greatest stack depth: 23264 bytes left
[ 1714.523163][    C1] ip6_tunnel: tep0 xmit: Local address not yet configured!
[ 1716.508122][    C3] ip6_tunnel: tep0 xmit: Local address not yet configured!
[ 1718.363122][    C3] ip6_tunnel: tep0 xmit: Local address not yet configured!
[ 1720.347128][    C2] ip6_tunnel: tep0 xmit: Local address not yet configured!