[  568.578647][ T1911] gre: GRE over IPv4 demultiplexor driver
[  571.052243][ T1934] ip_gre: GRE over IPv4 tunneling driver
[  640.626065][ T2506] ip6_gre: GRE over IPv6 tunneling driver
[  672.268369][ T2756] ping (2756) used greatest stack depth: 23568 bytes left
[  689.650594][    C1] ip6_tunnel: tep0 xmit: Local address not yet configured!
[  696.177505][    C2] ip6_tunnel: tep0 xmit: Local address not yet configured!
[  701.746505][    C1] ip6_tunnel: tep0 xmit: Local address not yet configured!
[  708.273507][    C1] ip6_tunnel: tep0 xmit: Local address not yet configured!
[  970.791659][ T5219] ping (5219) used greatest stack depth: 23448 bytes left