[ 4360.155263][T29176] gre: GRE over IPv4 demultiplexer driver
[ 4361.800315][T29199] ip_gre: GRE over IPv4 tunneling driver
[ 4412.540186][T29778] ip6_gre: GRE over IPv6 tunneling driver
[ 4435.364637][T30027] ping (30027) used greatest stack depth: 23440 bytes left
[ 4448.631198][    C2] ip6_tunnel: tep0 xmit: Local address not yet configured!
[ 4453.559152][    C1] ip6_tunnel: tep0 xmit: Local address not yet configured!
[ 4457.847141][    C2] ip6_tunnel: tep0 xmit: Local address not yet configured!
[ 4462.839263][    C1] ip6_tunnel: tep0 xmit: Local address not yet configured!