[ 1439.390157][T11890] gre: GRE over IPv4 demultiplexer driver
[ 1439.833381][T11913] ip_gre: GRE over IPv4 tunneling driver
[ 1445.173994][T12166] ping (12166) used greatest stack depth: 23760 bytes left
[ 1455.302119][T12486] ip6_gre: GRE over IPv6 tunneling driver
[ 1459.775056][T12563] ip6_tunnel: tep1 xmit: Local address not yet configured!
[ 1465.487987][    C2] ip6_tunnel: tep0 xmit: Local address not yet configured!
[ 1467.471988][    C1] ip6_tunnel: tep0 xmit: Local address not yet configured!
[ 1469.263989][    C2] ip6_tunnel: tep0 xmit: Local address not yet configured!
[ 1471.246994][    C3] ip6_tunnel: tep0 xmit: Local address not yet configured!
[ 1493.576301][T13986] ping (13986) used greatest stack depth: 23728 bytes left