[ 3107.111366][T15771] gre: GRE over IPv4 demultiplexor driver
[ 3109.135401][T15795] ip_gre: GRE over IPv4 tunneling driver
[ 3169.667604][T16369] ip6_gre: GRE over IPv6 tunneling driver
[ 3196.450140][T16618] ping (16618) used greatest stack depth: 22288 bytes left
[ 3212.028105][    C2] ip6_tunnel: tep0 xmit: Local address not yet configured!
[ 3218.107980][    C1] ip6_tunnel: tep0 xmit: Local address not yet configured!
[ 3223.227989][    C2] ip6_tunnel: tep0 xmit: Local address not yet configured!
[ 3229.371994][    C3] ip6_tunnel: tep0 xmit: Local address not yet configured!