[ 3237.307069][T26266] gre: GRE over IPv4 demultiplexor driver
[ 3238.530021][T26291] ip_gre: GRE over IPv4 tunneling driver
[ 3255.997332][T26595] ping (26595) used greatest stack depth: 23200 bytes left
[ 3274.888828][T26871] ip6_gre: GRE over IPv6 tunneling driver
[ 3281.922407][T15666] ip6_tunnel: tep1 xmit: Local address not yet configured!
[ 3287.425298][T17208] ip6_tunnel: tep1 xmit: Local address not yet configured!
[ 3300.033235][    C1] ip6_tunnel: tep0 xmit: Local address not yet configured!
[ 3304.001236][    C2] ip6_tunnel: tep0 xmit: Local address not yet configured!
[ 3307.265211][    C2] ip6_tunnel: tep0 xmit: Local address not yet configured!
[ 3311.105233][    C1] ip6_tunnel: tep0 xmit: Local address not yet configured!