[ 4345.495939][T21167] gre: GRE over IPv4 demultiplexer driver
[ 4347.072152][T21190] ip_gre: GRE over IPv4 tunneling driver
[ 4394.772475][T21763] ip6_gre: GRE over IPv6 tunneling driver
[ 4410.885807][T21969] ping (21969) used greatest stack depth: 23184 bytes left
[ 4427.067152][    C1] ip6_tunnel: tep0 xmit: Local address not yet configured!
[ 4431.740055][    C2] ip6_tunnel: tep0 xmit: Local address not yet configured!
[ 4435.771048][    C2] ip6_tunnel: tep0 xmit: Local address not yet configured!
[ 4440.443119][    C0] ip6_tunnel: tep0 xmit: Local address not yet configured!