[ 4659.422594][T23306] gre: GRE over IPv4 demultiplexor driver
[ 4661.575739][T23329] ip_gre: GRE over IPv4 tunneling driver
[ 4724.557213][T23901] ip6_gre: GRE over IPv6 tunneling driver
[ 4763.336683][T24261] ping (24261) used greatest stack depth: 21888 bytes left
[ 4769.462432][    C2] ip6_tunnel: tep0 xmit: Local address not yet configured!
[ 4775.542312][    C3] ip6_tunnel: tep0 xmit: Local address not yet configured!
[ 4780.726324][    C1] ip6_tunnel: tep0 xmit: Local address not yet configured!
[ 4786.870328][    C2] ip6_tunnel: tep0 xmit: Local address not yet configured!