[ 1539.891915][T20627] gre: GRE over IPv4 demultiplexer driver
[ 1540.413812][T20650] ip_gre: GRE over IPv4 tunneling driver
[ 1556.581119][T21246] ip6_gre: GRE over IPv6 tunneling driver
[ 1564.150820][T21589] ping (21589) used greatest stack depth: 23072 bytes left
[ 1566.992427][    C2] ip6_tunnel: tep0 xmit: Local address not yet configured!
[ 1569.041395][    C3] ip6_tunnel: tep0 xmit: Local address not yet configured!
[ 1570.960392][    C0] ip6_tunnel: tep0 xmit: Local address not yet configured!
[ 1572.944394][    C3] ip6_tunnel: tep0 xmit: Local address not yet configured!