[ 3471.739105][T20515] gre: GRE over IPv4 demultiplexor driver
[ 3473.793741][T20538] ip_gre: GRE over IPv4 tunneling driver
[ 3509.654999][T20885] ping (20885) used greatest stack depth: 22656 bytes left
[ 3534.089492][T21110] ip6_gre: GRE over IPv6 tunneling driver
[ 3576.752649][    C2] ip6_tunnel: tep0 xmit: Local address not yet configured!
[ 3582.577560][    C1] ip6_tunnel: tep0 xmit: Local address not yet configured!
[ 3587.504558][    C2] ip6_tunnel: tep0 xmit: Local address not yet configured!
[ 3593.264566][    C2] ip6_tunnel: tep0 xmit: Local address not yet configured!