[ 1536.058875][T18825] gre: GRE over IPv4 demultiplexer driver
[ 1536.590167][T18848] ip_gre: GRE over IPv4 tunneling driver
[ 1539.713699][T18999] ip (18999) used greatest stack depth: 23648 bytes left
[ 1552.640157][T19426] ip6_gre: GRE over IPv6 tunneling driver
[ 1563.103871][    C3] ip6_tunnel: tep0 xmit: Local address not yet configured!
[ 1565.151848][    C3] ip6_tunnel: tep0 xmit: Local address not yet configured!
[ 1567.006847][    C2] ip6_tunnel: tep0 xmit: Local address not yet configured!
[ 1569.119846][    C2] ip6_tunnel: tep0 xmit: Local address not yet configured!
[ 1624.630883][T22046] ping (22046) used greatest stack depth: 23344 bytes left