[ 1523.042401][T28398] gre: GRE over IPv4 demultiplexer driver
[ 1523.525922][T28421] ip_gre: GRE over IPv4 tunneling driver
[ 1539.578599][T28993] ip6_gre: GRE over IPv6 tunneling driver
[ 1547.409908][T29338] ping (29338) used greatest stack depth: 23248 bytes left
[ 1550.278957][    C1] ip6_tunnel: tep0 xmit: Local address not yet configured!
[ 1552.327876][    C2] ip6_tunnel: tep0 xmit: Local address not yet configured!
[ 1554.247455][    C3] ip6_tunnel: tep0 xmit: Local address not yet configured!
[ 1556.295879][    C3] ip6_tunnel: tep0 xmit: Local address not yet configured!