[ 3894.096003][T20152] gre: GRE over IPv4 demultiplexor driver
[ 3896.086053][T20175] ip_gre: GRE over IPv4 tunneling driver
[ 3958.449132][T20755] ip6_gre: GRE over IPv6 tunneling driver
[ 3965.724877][T20816] ping (20816) used greatest stack depth: 23232 bytes left
[ 4000.966523][    C3] ip6_tunnel: tep0 xmit: Local address not yet configured!
[ 4006.918472][    C2] ip6_tunnel: tep0 xmit: Local address not yet configured!
[ 4012.038466][    C2] ip6_tunnel: tep0 xmit: Local address not yet configured!
[ 4017.990468][    C2] ip6_tunnel: tep0 xmit: Local address not yet configured!