[ 4222.551886][T29141] gre: GRE over IPv4 demultiplexer driver
[ 4224.193402][T29164] ip_gre: GRE over IPv4 tunneling driver
[ 4273.065706][T29736] ip6_gre: GRE over IPv6 tunneling driver
[ 4301.248736][T30080] ping (30080) used greatest stack depth: 22400 bytes left
[ 4306.406801][    C1] ip6_tunnel: tep0 xmit: Local address not yet configured!
[ 4311.269703][    C3] ip6_tunnel: tep0 xmit: Local address not yet configured!
[ 4315.429687][    C1] ip6_tunnel: tep0 xmit: Local address not yet configured!
[ 4320.357731][    C2] ip6_tunnel: tep0 xmit: Local address not yet configured!