[ 3195.107422][T23670] gre: GRE over IPv4 demultiplexer driver
[ 3196.761751][T23693] ip_gre: GRE over IPv4 tunneling driver
[ 3245.619926][T24265] ip6_gre: GRE over IPv6 tunneling driver
[ 3266.172766][T24515] ping (24515) used greatest stack depth: 23648 bytes left
[ 3278.902772][    C1] ip6_tunnel: tep0 xmit: Local address not yet configured!
[ 3283.765694][    C2] ip6_tunnel: tep0 xmit: Local address not yet configured!
[ 3288.054669][    C2] ip6_tunnel: tep0 xmit: Local address not yet configured!
[ 3293.046677][    C2] ip6_tunnel: tep0 xmit: Local address not yet configured!
[ 3460.418847][T26778] ping (26778) used greatest stack depth: 23488 bytes left