[ 3207.376060][T26088] gre: GRE over IPv4 demultiplexor driver
[ 3209.701828][T26112] ip_gre: GRE over IPv4 tunneling driver
[ 3274.357541][T26685] ip6_gre: GRE over IPv6 tunneling driver
[ 3297.201685][T26884] ping (26884) used greatest stack depth: 22256 bytes left
[ 3319.330428][    C2] ip6_tunnel: tep0 xmit: Local address not yet configured!
[ 3325.731195][    C3] ip6_tunnel: tep0 xmit: Local address not yet configured!
[ 3330.914279][    C1] ip6_tunnel: tep0 xmit: Local address not yet configured!
[ 3337.250196][    C2] ip6_tunnel: tep0 xmit: Local address not yet configured!