[ 3145.558312][T27797] gre: GRE over IPv4 demultiplexor driver
[ 3146.721385][T27820] ip_gre: GRE over IPv4 tunneling driver
[ 3183.433775][T28398] ip6_gre: GRE over IPv6 tunneling driver
[ 3198.853922][T28648] ping (28648) used greatest stack depth: 23312 bytes left
[ 3208.371635][    C1] ip6_tunnel: tep0 xmit: Local address not yet configured!
[ 3212.084529][    C2] ip6_tunnel: tep0 xmit: Local address not yet configured!
[ 3215.284523][    C2] ip6_tunnel: tep0 xmit: Local address not yet configured!
[ 3219.059542][    C3] ip6_tunnel: tep0 xmit: Local address not yet configured!