[ 3117.866342][T20679] gre: GRE over IPv4 demultiplexor driver
[ 3119.114161][T20702] ip_gre: GRE over IPv4 tunneling driver
[ 3153.791832][T21278] ip6_gre: GRE over IPv6 tunneling driver
[ 3167.624110][T21527] ping (21527) used greatest stack depth: 23312 bytes left
[ 3176.957663][    C3] ip6_tunnel: tep0 xmit: Local address not yet configured!
[ 3180.669590][    C1] ip6_tunnel: tep0 xmit: Local address not yet configured!
[ 3183.869591][    C3] ip6_tunnel: tep0 xmit: Local address not yet configured!
[ 3187.709582][    C2] ip6_tunnel: tep0 xmit: Local address not yet configured!