[ 4450.474481][T26038] gre: GRE over IPv4 demultiplexor driver
[ 4452.541384][T26061] ip_gre: GRE over IPv4 tunneling driver
[ 4514.673648][T26633] ip6_gre: GRE over IPv6 tunneling driver
[ 4542.421361][T26882] ping (26882) used greatest stack depth: 23616 bytes left
[ 4558.321512][    C2] ip6_tunnel: tep0 xmit: Local address not yet configured!
[ 4564.337426][    C1] ip6_tunnel: tep0 xmit: Local address not yet configured!
[ 4569.393428][    C3] ip6_tunnel: tep0 xmit: Local address not yet configured!
[ 4575.409422][    C2] ip6_tunnel: tep0 xmit: Local address not yet configured!