[ 2529.684612][T17622] gre: GRE over IPv4 demultiplexor driver
[ 2531.716659][T17645] ip_gre: GRE over IPv4 tunneling driver
[ 2592.640157][T18223] ip6_gre: GRE over IPv6 tunneling driver
[ 2619.038946][T18472] ping (18472) used greatest stack depth: 22208 bytes left
[ 2634.224866][    C3] ip6_tunnel: tep0 xmit: Local address not yet configured!
[ 2640.236834][    C2] ip6_tunnel: tep0 xmit: Local address not yet configured!
[ 2645.101786][    C2] ip6_tunnel: tep0 xmit: Local address not yet configured!
[ 2651.053815][    C1] ip6_tunnel: tep0 xmit: Local address not yet configured!