[ 1404.969814][T15337] gre: GRE over IPv4 demultiplexer driver
[ 1405.418456][T15360] ip_gre: GRE over IPv4 tunneling driver
[ 1410.772654][T15613] ping (15613) used greatest stack depth: 23680 bytes left
[ 1420.810501][T15932] ip6_gre: GRE over IPv6 tunneling driver
[ 1430.887012][    C2] ip6_tunnel: tep0 xmit: Local address not yet configured!
[ 1432.870998][    C2] ip6_tunnel: tep0 xmit: Local address not yet configured!
[ 1434.725996][    C3] ip6_tunnel: tep0 xmit: Local address not yet configured!
[ 1436.710987][    C2] ip6_tunnel: tep0 xmit: Local address not yet configured!