[ 4447.486103][T26038] gre: GRE over IPv4 demultiplexor driver
[ 4449.494183][T26061] ip_gre: GRE over IPv4 tunneling driver
[ 4511.434920][T26633] ip6_gre: GRE over IPv6 tunneling driver
[ 4537.986060][T26882] ping (26882) used greatest stack depth: 23616 bytes left
[ 4554.543436][    C2] ip6_tunnel: tep0 xmit: Local address not yet configured!
[ 4560.432309][    C1] ip6_tunnel: tep0 xmit: Local address not yet configured!
[ 4565.423387][    C1] ip6_tunnel: tep0 xmit: Local address not yet configured!
[ 4571.695376][    C1] ip6_tunnel: tep0 xmit: Local address not yet configured!