[ 1717.484722][T27407] gre: GRE over IPv4 demultiplexer driver
[ 1717.938716][T27430] ip_gre: GRE over IPv4 tunneling driver
[ 1734.054033][T28002] ip6_gre: GRE over IPv6 tunneling driver
[ 1739.667560][T28252] ping (28252) used greatest stack depth: 23208 bytes left
[ 1744.646241][    C2] ip6_tunnel: tep0 xmit: Local address not yet configured!
[ 1746.694195][    C3] ip6_tunnel: tep0 xmit: Local address not yet configured!
[ 1748.614206][    C3] ip6_tunnel: tep0 xmit: Local address not yet configured!
[ 1750.661211][    C1] ip6_tunnel: tep0 xmit: Local address not yet configured!