[ 1579.140138][T24611] gre: GRE over IPv4 demultiplexer driver
[ 1579.700170][T24641] ip_gre: GRE over IPv4 tunneling driver
[ 1595.710184][T25214] ip6_gre: GRE over IPv6 tunneling driver
[ 1600.144830][T25414] ping (25414) used greatest stack depth: 23664 bytes left
[ 1606.183023][    C2] ip6_tunnel: tep0 xmit: Local address not yet configured!
[ 1608.230986][    C1] ip6_tunnel: tep0 xmit: Local address not yet configured!
[ 1610.150034][    C1] ip6_tunnel: tep0 xmit: Local address not yet configured!
[ 1612.197997][    C3] ip6_tunnel: tep0 xmit: Local address not yet configured!