[ 4449.444271][T26159] gre: GRE over IPv4 demultiplexor driver
[ 4451.420268][T26183] ip_gre: GRE over IPv4 tunneling driver
[ 4481.570506][T26479] ping (26479) used greatest stack depth: 22992 bytes left
[ 4511.028757][T26754] ip6_gre: GRE over IPv6 tunneling driver
[ 4552.764539][    C2] ip6_tunnel: tep0 xmit: Local address not yet configured!
[ 4558.525431][    C1] ip6_tunnel: tep0 xmit: Local address not yet configured!
[ 4563.452476][    C2] ip6_tunnel: tep0 xmit: Local address not yet configured!
[ 4569.405436][    C3] ip6_tunnel: tep0 xmit: Local address not yet configured!