[  421.743763][ T1956] gre: GRE over IPv4 demultiplexer driver
[  423.420056][ T1979] ip_gre: GRE over IPv4 tunneling driver
[  451.942154][ T2326] ping (2326) used greatest stack depth: 24208 bytes left
[  472.319691][ T2552] ip6_gre: GRE over IPv6 tunneling driver
[  493.399769][ T2801] ping (2801) used greatest stack depth: 23440 bytes left
[  506.330477][    C0] ip6_tunnel: tep0 xmit: Local address not yet configured!
[  511.386418][    C2] ip6_tunnel: tep0 xmit: Local address not yet configured!
[  515.738409][    C3] ip6_tunnel: tep0 xmit: Local address not yet configured!
[  520.730381][    C1] ip6_tunnel: tep0 xmit: Local address not yet configured!
[  571.593075][ T3681] ip (3681) used greatest stack depth: 23216 bytes left