[ 4430.817452][T29662] gre: GRE over IPv4 demultiplexer driver
[ 4432.501530][T29685] ip_gre: GRE over IPv4 tunneling driver
[ 4485.972606][T30271] ip6_gre: GRE over IPv6 tunneling driver
[ 4509.231351][T30521] ping (30521) used greatest stack depth: 22784 bytes left
[ 4523.620532][    C2] ip6_tunnel: tep0 xmit: Local address not yet configured!
[ 4529.188487][    C3] ip6_tunnel: tep0 xmit: Local address not yet configured!
[ 4533.860526][    C1] ip6_tunnel: tep0 xmit: Local address not yet configured!
[ 4539.172565][    C0] ip6_tunnel: tep0 xmit: Local address not yet configured!