[ 4202.926843][T28721] gre: GRE over IPv4 demultiplexer driver
[ 4204.523132][T28744] ip_gre: GRE over IPv4 tunneling driver
[ 4253.661624][T29315] ip6_gre: GRE over IPv6 tunneling driver
[ 4277.899848][T29609] ping (29609) used greatest stack depth: 23536 bytes left
[ 4287.272044][    C3] ip6_tunnel: tep0 xmit: Local address not yet configured!
[ 4292.199997][    C2] ip6_tunnel: tep0 xmit: Local address not yet configured!
[ 4296.487953][    C1] ip6_tunnel: tep0 xmit: Local address not yet configured!
[ 4301.415978][    C1] ip6_tunnel: tep0 xmit: Local address not yet configured!