[ 4069.353750][T28693] gre: GRE over IPv4 demultiplexer driver
[ 4070.938163][T28717] ip_gre: GRE over IPv4 tunneling driver
[ 4118.751213][T29288] ip6_gre: GRE over IPv6 tunneling driver
[ 4135.322813][T29488] ping (29488) used greatest stack depth: 23536 bytes left
[ 4139.407180][T29538] ping (29538) used greatest stack depth: 23440 bytes left
[ 4152.358398][    C1] ip6_tunnel: tep0 xmit: Local address not yet configured!
[ 4157.222282][    C1] ip6_tunnel: tep0 xmit: Local address not yet configured!
[ 4161.382308][    C2] ip6_tunnel: tep0 xmit: Local address not yet configured!
[ 4166.246288][    C3] ip6_tunnel: tep0 xmit: Local address not yet configured!