[ 4488.058864][T25985] gre: GRE over IPv4 demultiplexor driver
[ 4490.082291][T26008] ip_gre: GRE over IPv4 tunneling driver
[ 4520.696469][T26304] ping (26304) used greatest stack depth: 22992 bytes left
[ 4549.831404][T26580] ip6_gre: GRE over IPv6 tunneling driver
[ 4591.856248][    C1] ip6_tunnel: tep0 xmit: Local address not yet configured!
[ 4597.679191][    C2] ip6_tunnel: tep0 xmit: Local address not yet configured!
[ 4602.671203][    C2] ip6_tunnel: tep0 xmit: Local address not yet configured!
[ 4608.495202][    C3] ip6_tunnel: tep0 xmit: Local address not yet configured!