[ 3130.762777][T28954] gre: GRE over IPv4 demultiplexor driver
[ 3131.961006][T28977] ip_gre: GRE over IPv4 tunneling driver
[ 3166.735460][T29550] ip6_gre: GRE over IPv6 tunneling driver
[ 3186.192100][T29893] ping (29893) used greatest stack depth: 23296 bytes left
[ 3190.359441][    C3] ip6_tunnel: tep0 xmit: Local address not yet configured!
[ 3194.135373][    C1] ip6_tunnel: tep0 xmit: Local address not yet configured!
[ 3197.271380][    C1] ip6_tunnel: tep0 xmit: Local address not yet configured!
[ 3200.918381][    C2] ip6_tunnel: tep0 xmit: Local address not yet configured!