[ 3936.685232][T19938] gre: GRE over IPv4 demultiplexor driver
[ 3938.754729][T19961] ip_gre: GRE over IPv4 tunneling driver
[ 3999.232908][T20532] ip6_gre: GRE over IPv6 tunneling driver
[ 4037.838284][T20877] ping (20877) used greatest stack depth: 23360 bytes left
[ 4043.892829][    C2] ip6_tunnel: tep0 xmit: Local address not yet configured!
[ 4050.165709][    C1] ip6_tunnel: tep0 xmit: Local address not yet configured!
[ 4055.221720][    C0] ip6_tunnel: tep0 xmit: Local address not yet configured!
[ 4061.237702][    C3] ip6_tunnel: tep0 xmit: Local address not yet configured!
[ 4283.222273][T23097] ping (23097) used greatest stack depth: 23040 bytes left