[ 4333.411092][T20077] gre: GRE over IPv4 demultiplexor driver
[ 4335.534789][T20101] ip_gre: GRE over IPv4 tunneling driver
[ 4398.716188][T20681] ip6_gre: GRE over IPv6 tunneling driver
[ 4431.657673][T20974] ping (20974) used greatest stack depth: 22400 bytes left
[ 4443.383721][    C1] ip6_tunnel: tep0 xmit: Local address not yet configured!
[ 4449.463602][    C3] ip6_tunnel: tep0 xmit: Local address not yet configured!
[ 4454.583614][    C2] ip6_tunnel: tep0 xmit: Local address not yet configured!
[ 4460.727604][    C2] ip6_tunnel: tep0 xmit: Local address not yet configured!