[ 4318.580870][T29216] gre: GRE over IPv4 demultiplexer driver
[ 4320.469788][T29246] ip_gre: GRE over IPv4 tunneling driver
[ 4370.409066][T29817] ip6_gre: GRE over IPv6 tunneling driver
[ 4391.569962][T30071] ping (30071) used greatest stack depth: 23440 bytes left
[ 4404.452766][    C2] ip6_tunnel: tep0 xmit: Local address not yet configured!
[ 4409.380709][    C2] ip6_tunnel: tep0 xmit: Local address not yet configured!
[ 4413.668704][    C3] ip6_tunnel: tep0 xmit: Local address not yet configured!
[ 4418.724715][    C1] ip6_tunnel: tep0 xmit: Local address not yet configured!