[ 3069.006521][T17215] gre: GRE over IPv4 demultiplexor driver
[ 3071.078238][T17238] ip_gre: GRE over IPv4 tunneling driver
[ 3131.270880][T17814] ip6_gre: GRE over IPv6 tunneling driver
[ 3157.490414][T18063] ping (18063) used greatest stack depth: 21744 bytes left
[ 3172.916708][    C2] ip6_tunnel: tep0 xmit: Local address not yet configured!
[ 3178.805605][    C1] ip6_tunnel: tep0 xmit: Local address not yet configured!
[ 3183.732625][    C2] ip6_tunnel: tep0 xmit: Local address not yet configured!
[ 3189.749626][    C3] ip6_tunnel: tep0 xmit: Local address not yet configured!