[ 4510.399475][T21641] gre: GRE over IPv4 demultiplexer driver
[ 4512.074802][T21664] ip_gre: GRE over IPv4 tunneling driver
[ 4561.913248][T22237] ip6_gre: GRE over IPv6 tunneling driver
[ 4590.647329][T22580] ping (22580) used greatest stack depth: 23440 bytes left
[ 4595.856006][    C3] ip6_tunnel: tep0 xmit: Local address not yet configured!
[ 4600.847910][    C2] ip6_tunnel: tep0 xmit: Local address not yet configured!
[ 4605.071883][    C3] ip6_tunnel: tep0 xmit: Local address not yet configured!
[ 4610.000887][    C3] ip6_tunnel: tep0 xmit: Local address not yet configured!