[ 4370.915160][T22488] gre: GRE over IPv4 demultiplexor driver
[ 4372.915937][T22511] ip_gre: GRE over IPv4 tunneling driver
[ 4399.262339][T22763] ping (22763) used greatest stack depth: 22416 bytes left
[ 4433.997223][T23083] ip6_gre: GRE over IPv6 tunneling driver
[ 4476.151594][    C2] ip6_tunnel: tep0 xmit: Local address not yet configured!
[ 4481.846544][    C1] ip6_tunnel: tep0 xmit: Local address not yet configured!
[ 4486.646517][    C3] ip6_tunnel: tep0 xmit: Local address not yet configured!
[ 4492.470589][    C2] ip6_tunnel: tep0 xmit: Local address not yet configured!