[ 3152.175556][T27785] gre: GRE over IPv4 demultiplexor driver
[ 3153.394094][T27808] ip_gre: GRE over IPv4 tunneling driver
[ 3189.817596][T28380] ip6_gre: GRE over IPv6 tunneling driver
[ 3194.189483][T27860] ip6_tunnel: tep1 xmit: Local address not yet configured!
[ 3206.805461][T28675] ping (28675) used greatest stack depth: 22736 bytes left
[ 3213.965338][    C1] ip6_tunnel: tep0 xmit: Local address not yet configured!
[ 3217.741339][    C2] ip6_tunnel: tep0 xmit: Local address not yet configured!
[ 3221.069336][    C2] ip6_tunnel: tep0 xmit: Local address not yet configured!
[ 3224.846336][    C1] ip6_tunnel: tep0 xmit: Local address not yet configured!