[ 3683.993300][T26118] gre: GRE over IPv4 demultiplexor driver
[ 3686.050816][T26141] ip_gre: GRE over IPv4 tunneling driver
[ 3712.371850][T26393] ping (26393) used greatest stack depth: 22400 bytes left
[ 3746.959700][T26714] ip6_gre: GRE over IPv6 tunneling driver
[ 3789.106668][    C1] ip6_tunnel: tep0 xmit: Local address not yet configured!
[ 3795.186627][    C2] ip6_tunnel: tep0 xmit: Local address not yet configured!
[ 3800.434596][    C2] ip6_tunnel: tep0 xmit: Local address not yet configured!
[ 3806.642589][    C1] ip6_tunnel: tep0 xmit: Local address not yet configured!