[ 4446.537894][T26304] gre: GRE over IPv4 demultiplexor driver
[ 4448.589433][T26327] ip_gre: GRE over IPv4 tunneling driver
[ 4509.414178][T26899] ip6_gre: GRE over IPv6 tunneling driver
[ 4535.990148][T27148] ping (27148) used greatest stack depth: 22896 bytes left
[ 4551.745703][    C3] ip6_tunnel: tep0 xmit: Local address not yet configured!
[ 4557.632586][    C2] ip6_tunnel: tep0 xmit: Local address not yet configured!
[ 4562.688591][    C1] ip6_tunnel: tep0 xmit: Local address not yet configured!
[ 4568.576579][    C3] ip6_tunnel: tep0 xmit: Local address not yet configured!