[ 3131.558502][T27801] gre: GRE over IPv4 demultiplexor driver
[ 3132.684356][T27824] ip_gre: GRE over IPv4 tunneling driver
[ 3167.227184][T28400] ip6_gre: GRE over IPv6 tunneling driver
[ 3178.861305][T26136] ip6_tunnel: tep1 xmit: Local address not yet configured!
[ 3181.469906][T28649] ping (28649) used greatest stack depth: 23552 bytes left
[ 3191.022177][    C1] ip6_tunnel: tep0 xmit: Local address not yet configured!
[ 3194.670133][    C2] ip6_tunnel: tep0 xmit: Local address not yet configured!
[ 3197.869138][    C3] ip6_tunnel: tep0 xmit: Local address not yet configured!
[ 3201.517145][    C0] ip6_tunnel: tep0 xmit: Local address not yet configured!