[ 4733.170685][T24734] gre: GRE over IPv4 demultiplexor driver
[ 4735.425933][T24757] ip_gre: GRE over IPv4 tunneling driver
[ 4800.153928][T25329] ip6_gre: GRE over IPv6 tunneling driver
[ 4829.754318][T25585] ping (25585) used greatest stack depth: 23600 bytes left
[ 4846.214355][    C1] ip6_tunnel: tep0 xmit: Local address not yet configured!
[ 4852.422280][    C1] ip6_tunnel: tep0 xmit: Local address not yet configured!
[ 4857.669312][    C2] ip6_tunnel: tep0 xmit: Local address not yet configured!
[ 4863.941318][    C2] ip6_tunnel: tep0 xmit: Local address not yet configured!