[ 3490.838911][T19597] gre: GRE over IPv4 demultiplexor driver
[ 3492.943783][T19620] ip_gre: GRE over IPv4 tunneling driver
[ 3521.797778][T19872] ping (19872) used greatest stack depth: 23744 bytes left
[ 3558.492708][T20193] ip6_gre: GRE over IPv6 tunneling driver
[ 3597.180635][T20536] ping (20536) used greatest stack depth: 23632 bytes left
[ 3603.353356][    C2] ip6_tunnel: tep0 xmit: Local address not yet configured!
[ 3609.626226][    C1] ip6_tunnel: tep0 xmit: Local address not yet configured!
[ 3614.937239][    C2] ip6_tunnel: tep0 xmit: Local address not yet configured!
[ 3621.017257][    C0] ip6_tunnel: tep0 xmit: Local address not yet configured!