[ 1511.644996][ T3378] gre: GRE over IPv4 demultiplexer driver
[ 1512.083272][ T3401] ip_gre: GRE over IPv4 tunneling driver
[ 1519.573290][ T3755] ping (3755) used greatest stack depth: 22912 bytes left
[ 1527.829372][ T3980] ip6_gre: GRE over IPv6 tunneling driver
[ 1533.529863][ T3750] ip6_tunnel: tep1 xmit: Local address not yet configured!
[ 1538.202787][    C2] ip6_tunnel: tep0 xmit: Local address not yet configured!
[ 1540.186793][    C1] ip6_tunnel: tep0 xmit: Local address not yet configured!
[ 1542.041797][    C3] ip6_tunnel: tep0 xmit: Local address not yet configured!
[ 1544.089790][    C2] ip6_tunnel: tep0 xmit: Local address not yet configured!
[ 1566.994818][ T5461] ping (5461) used greatest stack depth: 22672 bytes left