[ 3175.481366][T26414] gre: GRE over IPv4 demultiplexor driver
[ 3176.685506][T26437] ip_gre: GRE over IPv4 tunneling driver
[ 3213.402812][T27016] ip6_gre: GRE over IPv6 tunneling driver
[ 3217.772455][T31388] ip6_tunnel: tep1 xmit: Local address not yet configured!
[ 3234.220288][T31388] ip6_tunnel: tep1 xmit: Local address not yet configured!
[ 3238.124168][    C1] ip6_tunnel: tep0 xmit: Local address not yet configured!
[ 3241.900172][    C3] ip6_tunnel: tep0 xmit: Local address not yet configured!
[ 3245.228163][    C2] ip6_tunnel: tep0 xmit: Local address not yet configured!
[ 3249.069194][    C1] ip6_tunnel: tep0 xmit: Local address not yet configured!
[ 3320.669044][T28686] ping (28686) used greatest stack depth: 23344 bytes left
[ 3369.762363][T29485] ping (29485) used greatest stack depth: 23168 bytes left