[ 4555.439446][T29671] gre: GRE over IPv4 demultiplexer driver
[ 4557.118008][T29694] ip_gre: GRE over IPv4 tunneling driver
[ 4609.996870][T30268] ip6_gre: GRE over IPv6 tunneling driver
[ 4632.196716][T30517] ping (30517) used greatest stack depth: 22512 bytes left
[ 4645.522101][    C1] ip6_tunnel: tep0 xmit: Local address not yet configured!
[ 4650.642024][    C2] ip6_tunnel: tep0 xmit: Local address not yet configured!
[ 4655.121982][    C3] ip6_tunnel: tep0 xmit: Local address not yet configured!
[ 4660.178077][    C1] ip6_tunnel: tep0 xmit: Local address not yet configured!