[ 1668.846816][T19728] gre: GRE over IPv4 demultiplexer driver
[ 1669.411439][T19751] ip_gre: GRE over IPv4 tunneling driver
[ 1685.959106][T20322] ip6_gre: GRE over IPv6 tunneling driver
[ 1696.983853][    C2] ip6_tunnel: tep0 xmit: Local address not yet configured!
[ 1699.095818][    C2] ip6_tunnel: tep0 xmit: Local address not yet configured!
[ 1701.015812][    C1] ip6_tunnel: tep0 xmit: Local address not yet configured!
[ 1703.064803][    C2] ip6_tunnel: tep0 xmit: Local address not yet configured!