[ 3124.940225][T20552] gre: GRE over IPv4 demultiplexor driver
[ 3126.119185][T20575] ip_gre: GRE over IPv4 tunneling driver
[ 3161.695275][T21151] ip6_gre: GRE over IPv6 tunneling driver
[ 3176.172651][T21400] ping (21400) used greatest stack depth: 23392 bytes left
[ 3185.622319][    C3] ip6_tunnel: tep0 xmit: Local address not yet configured!
[ 3189.397240][    C1] ip6_tunnel: tep0 xmit: Local address not yet configured!
[ 3192.597234][    C1] ip6_tunnel: tep0 xmit: Local address not yet configured!
[ 3196.309224][    C2] ip6_tunnel: tep0 xmit: Local address not yet configured!