[ 1513.883111][T16899] gre: GRE over IPv4 demultiplexer driver
[ 1514.337141][T16922] ip_gre: GRE over IPv4 tunneling driver
[ 1521.504328][T17268] ping (17268) used greatest stack depth: 23552 bytes left
[ 1529.474360][T17493] ip6_gre: GRE over IPv6 tunneling driver
[ 1539.453145][    C2] ip6_tunnel: tep0 xmit: Local address not yet configured!
[ 1541.372112][    C2] ip6_tunnel: tep0 xmit: Local address not yet configured!
[ 1543.165115][    C3] ip6_tunnel: tep0 xmit: Local address not yet configured!
[ 1545.149128][    C2] ip6_tunnel: tep0 xmit: Local address not yet configured!