[ 3501.955908][T18874] gre: GRE over IPv4 demultiplexor driver
[ 3503.946144][T18898] ip_gre: GRE over IPv4 tunneling driver
[ 3563.479042][T19479] ip6_gre: GRE over IPv6 tunneling driver
[ 3589.535930][T19728] ping (19728) used greatest stack depth: 23632 bytes left
[ 3605.058468][    C2] ip6_tunnel: tep0 xmit: Local address not yet configured!
[ 3610.945447][    C0] ip6_tunnel: tep0 xmit: Local address not yet configured!
[ 3615.937428][    C1] ip6_tunnel: tep0 xmit: Local address not yet configured!
[ 3622.401473][    C2] ip6_tunnel: tep0 xmit: Local address not yet configured!