[ 2564.378508][T17623] gre: GRE over IPv4 demultiplexor driver
[ 2566.499042][T17646] ip_gre: GRE over IPv4 tunneling driver
[ 2626.123501][T18225] ip6_gre: GRE over IPv6 tunneling driver
[ 2661.024382][T18569] ping (18569) used greatest stack depth: 22640 bytes left
[ 2666.839940][    C3] ip6_tunnel: tep0 xmit: Local address not yet configured!
[ 2672.600940][    C3] ip6_tunnel: tep0 xmit: Local address not yet configured!
[ 2677.463878][    C2] ip6_tunnel: tep0 xmit: Local address not yet configured!
[ 2683.224874][    C1] ip6_tunnel: tep0 xmit: Local address not yet configured!