[ 4350.392365][T29245] gre: GRE over IPv4 demultiplexer driver
[ 4352.099626][T29268] ip_gre: GRE over IPv4 tunneling driver
[ 4403.976897][T29857] ip6_gre: GRE over IPv6 tunneling driver
[ 4433.812405][T30201] ping (30201) used greatest stack depth: 23440 bytes left
[ 4439.072747][    C2] ip6_tunnel: tep0 xmit: Local address not yet configured!
[ 4444.128636][    C1] ip6_tunnel: tep0 xmit: Local address not yet configured!
[ 4448.480629][    C2] ip6_tunnel: tep0 xmit: Local address not yet configured!
[ 4453.600614][    C1] ip6_tunnel: tep0 xmit: Local address not yet configured!