[ 3181.534662][T27849] gre: GRE over IPv4 demultiplexor driver
[ 3182.685711][T27872] ip_gre: GRE over IPv4 tunneling driver
[ 3217.832959][T28444] ip6_gre: GRE over IPv6 tunneling driver
[ 3232.161669][T28693] ping (28693) used greatest stack depth: 23296 bytes left
[ 3241.579404][    C3] ip6_tunnel: tep0 xmit: Local address not yet configured!
[ 3245.291300][    C1] ip6_tunnel: tep0 xmit: Local address not yet configured!
[ 3248.491297][    C1] ip6_tunnel: tep0 xmit: Local address not yet configured!
[ 3252.266328][    C2] ip6_tunnel: tep0 xmit: Local address not yet configured!