[ 3208.114749][T25878] gre: GRE over IPv4 demultiplexor driver
[ 3210.458720][T25902] ip_gre: GRE over IPv4 tunneling driver
[ 3270.624935][T26476] ip6_gre: GRE over IPv6 tunneling driver
[ 3297.179640][T26733] ping (26733) used greatest stack depth: 23056 bytes left
[ 3312.810780][    C1] ip6_tunnel: tep0 xmit: Local address not yet configured!
[ 3318.507705][    C3] ip6_tunnel: tep0 xmit: Local address not yet configured!
[ 3323.434723][    C1] ip6_tunnel: tep0 xmit: Local address not yet configured!
[ 3329.386727][    C2] ip6_tunnel: tep0 xmit: Local address not yet configured!