[ 3692.631247][T26380] gre: GRE over IPv4 demultiplexor driver
[ 3694.901530][T26407] ip_gre: GRE over IPv4 tunneling driver
[ 3757.573664][T26980] ip6_gre: GRE over IPv6 tunneling driver
[ 3800.879563][    C2] ip6_tunnel: tep0 xmit: Local address not yet configured!
[ 3806.895503][    C3] ip6_tunnel: tep0 xmit: Local address not yet configured!
[ 3812.207447][    C1] ip6_tunnel: tep0 xmit: Local address not yet configured!
[ 3818.223463][    C2] ip6_tunnel: tep0 xmit: Local address not yet configured!