[ 1523.310487][T25184] gre: GRE over IPv4 demultiplexer driver
[ 1523.796800][T25207] ip_gre: GRE over IPv4 tunneling driver
[ 1539.642472][T25787] ip6_gre: GRE over IPv6 tunneling driver
[ 1543.400717][   T51] ip6_tunnel: tep1 xmit: Local address not yet configured!
[ 1544.176429][T25986] ping (25986) used greatest stack depth: 23072 bytes left
[ 1550.184661][    C1] ip6_tunnel: tep0 xmit: Local address not yet configured!
[ 1552.233650][    C1] ip6_tunnel: tep0 xmit: Local address not yet configured!
[ 1554.089646][    C2] ip6_tunnel: tep0 xmit: Local address not yet configured!
[ 1556.136654][    C3] ip6_tunnel: tep0 xmit: Local address not yet configured!