[ 1485.052025][T12996] gre: GRE over IPv4 demultiplexer driver
[ 1485.510341][T13019] ip_gre: GRE over IPv4 tunneling driver
[ 1501.061999][T13594] ip6_gre: GRE over IPv6 tunneling driver
[ 1511.270055][    C2] ip6_tunnel: tep0 xmit: Local address not yet configured!
[ 1513.254032][    C2] ip6_tunnel: tep0 xmit: Local address not yet configured!
[ 1515.109032][    C1] ip6_tunnel: tep0 xmit: Local address not yet configured!
[ 1517.094033][    C2] ip6_tunnel: tep0 xmit: Local address not yet configured!