[ 4439.687569][T22395] gre: GRE over IPv4 demultiplexor driver
[ 4441.818942][T22418] ip_gre: GRE over IPv4 tunneling driver
[ 4503.772668][T22989] ip6_gre: GRE over IPv6 tunneling driver
[ 4530.313781][T23239] ping (23239) used greatest stack depth: 21384 bytes left
[ 4545.666352][    C3] ip6_tunnel: tep0 xmit: Local address not yet configured!
[ 4551.490263][    C1] ip6_tunnel: tep0 xmit: Local address not yet configured!
[ 4556.482262][    C1] ip6_tunnel: tep0 xmit: Local address not yet configured!
[ 4562.561333][    C2] ip6_tunnel: tep0 xmit: Local address not yet configured!