[ 4263.414512][T20353] gre: GRE over IPv4 demultiplexor driver
[ 4265.605681][T20384] ip_gre: GRE over IPv4 tunneling driver
[ 4326.117704][T20956] ip6_gre: GRE over IPv6 tunneling driver
[ 4347.822714][T21156] ping (21156) used greatest stack depth: 22400 bytes left
[ 4369.032549][    C1] ip6_tunnel: tep0 xmit: Local address not yet configured!
[ 4374.984491][    C2] ip6_tunnel: tep0 xmit: Local address not yet configured!
[ 4380.105474][    C1] ip6_tunnel: tep0 xmit: Local address not yet configured!
[ 4386.184479][    C2] ip6_tunnel: tep0 xmit: Local address not yet configured!