[ 4399.566169][T23351] gre: GRE over IPv4 demultiplexor driver
[ 4401.555061][T23374] ip_gre: GRE over IPv4 tunneling driver
[ 4462.667801][T23946] ip6_gre: GRE over IPv6 tunneling driver
[ 4504.652512][    C2] ip6_tunnel: tep0 xmit: Local address not yet configured!
[ 4510.413428][    C1] ip6_tunnel: tep0 xmit: Local address not yet configured!
[ 4515.212430][    C2] ip6_tunnel: tep0 xmit: Local address not yet configured!
[ 4520.909411][    C3] ip6_tunnel: tep0 xmit: Local address not yet configured!