[ 3888.914299][T19931] gre: GRE over IPv4 demultiplexor driver
[ 3891.000463][T19954] ip_gre: GRE over IPv4 tunneling driver
[ 3952.433442][T20527] ip6_gre: GRE over IPv6 tunneling driver
[ 3973.891016][T20726] ping (20726) used greatest stack depth: 22400 bytes left
[ 3995.246445][    C3] ip6_tunnel: tep0 xmit: Local address not yet configured!
[ 4001.070346][    C1] ip6_tunnel: tep0 xmit: Local address not yet configured!
[ 4006.190370][    C0] ip6_tunnel: tep0 xmit: Local address not yet configured!
[ 4012.078327][    C2] ip6_tunnel: tep0 xmit: Local address not yet configured!