[  721.619164] gre: GRE over IPv4 demultiplexor driver
[  721.748996] ip_gre: GRE over IPv4 tunneling driver
[  730.126658] ip6_gre: GRE over IPv6 tunneling driver
[  733.206454] ping (9440) used greatest stack depth: 12192 bytes left
[  735.545481] ip6_tunnel: tep0 xmit: Local address not yet configured!
[  736.889466] ip6_tunnel: tep0 xmit: Local address not yet configured!
[  738.233506] ip6_tunnel: tep0 xmit: Local address not yet configured!
[  739.641451] ip6_tunnel: tep0 xmit: Local address not yet configured!