[ 1612.098598][T31438] gre: GRE over IPv4 demultiplexer driver
[ 1612.663712][T31463] ip_gre: GRE over IPv4 tunneling driver
[ 1630.267021][T32037] ip6_gre: GRE over IPv6 tunneling driver
[ 1636.656440][T32293] ping (32293) used greatest stack depth: 23336 bytes left
[ 1642.003546][    C2] ip6_tunnel: tep0 xmit: Local address not yet configured!
[ 1644.115505][    C1] ip6_tunnel: tep0 xmit: Local address not yet configured!
[ 1645.970493][    C3] ip6_tunnel: tep0 xmit: Local address not yet configured!
[ 1648.018503][    C1] ip6_tunnel: tep0 xmit: Local address not yet configured!