[ 1623.457372][T16627] gre: GRE over IPv4 demultiplexer driver
[ 1623.914598][T16651] ip_gre: GRE over IPv4 tunneling driver
[ 1639.282914][T17224] ip6_gre: GRE over IPv6 tunneling driver
[ 1644.581647][T17474] ping (17474) used greatest stack depth: 23344 bytes left
[ 1649.332567][    C0] ip6_tunnel: tep0 xmit: Local address not yet configured!
[ 1651.317528][    C2] ip6_tunnel: tep0 xmit: Local address not yet configured!
[ 1653.109521][    C3] ip6_tunnel: tep0 xmit: Local address not yet configured!
[ 1655.092545][    C3] ip6_tunnel: tep0 xmit: Local address not yet configured!
[ 1675.194871][T18604] ping (18604) used greatest stack depth: 23200 bytes left