[ 4336.731678][T20114] gre: GRE over IPv4 demultiplexor driver
[ 4338.795682][T20137] ip_gre: GRE over IPv4 tunneling driver
[ 4402.542040][T20717] ip6_gre: GRE over IPv6 tunneling driver
[ 4431.151030][T20966] ping (20966) used greatest stack depth: 22128 bytes left
[ 4448.492561][    C2] ip6_tunnel: tep0 xmit: Local address not yet configured!
[ 4454.765524][    C3] ip6_tunnel: tep0 xmit: Local address not yet configured!
[ 4460.077488][    C2] ip6_tunnel: tep0 xmit: Local address not yet configured!
[ 4466.349457][    C3] ip6_tunnel: tep0 xmit: Local address not yet configured!