[ 3382.882431][T31373] gre: GRE over IPv4 demultiplexor driver
[ 3384.045391][T31397] ip_gre: GRE over IPv4 tunneling driver
[ 3419.514197][T31978] ip6_gre: GRE over IPv6 tunneling driver
[ 3431.226110][T32178] ping (32178) used greatest stack depth: 22400 bytes left
[ 3443.487296][    C1] ip6_tunnel: tep0 xmit: Local address not yet configured!
[ 3447.263231][    C2] ip6_tunnel: tep0 xmit: Local address not yet configured!
[ 3450.591223][    C1] ip6_tunnel: tep0 xmit: Local address not yet configured!
[ 3454.367221][    C2] ip6_tunnel: tep0 xmit: Local address not yet configured!