[ 4463.295296][T26165] gre: GRE over IPv4 demultiplexor driver
[ 4465.267827][T26189] ip_gre: GRE over IPv4 tunneling driver
[ 4500.366504][T26535] ping (26535) used greatest stack depth: 22416 bytes left
[ 4524.275185][T26761] ip6_gre: GRE over IPv6 tunneling driver
[ 4565.590654][    C1] ip6_tunnel: tep0 xmit: Local address not yet configured!
[ 4571.349587][    C2] ip6_tunnel: tep0 xmit: Local address not yet configured!
[ 4576.213581][    C2] ip6_tunnel: tep0 xmit: Local address not yet configured!
[ 4581.973594][    C1] ip6_tunnel: tep0 xmit: Local address not yet configured!