[ 4189.208106][T21075] gre: GRE over IPv4 demultiplexor driver
[ 4190.771092][T21098] ip_gre: GRE over IPv4 tunneling driver
[ 4238.430956][T21672] ip6_gre: GRE over IPv6 tunneling driver
[ 4258.874740][T21921] ping (21921) used greatest stack depth: 23440 bytes left
[ 4271.370523][    C1] ip6_tunnel: tep0 xmit: Local address not yet configured!
[ 4276.106397][    C3] ip6_tunnel: tep0 xmit: Local address not yet configured!
[ 4280.331402][    C0] ip6_tunnel: tep0 xmit: Local address not yet configured!
[ 4285.194391][    C1] ip6_tunnel: tep0 xmit: Local address not yet configured!