[ 4461.989941][T26209] gre: GRE over IPv4 demultiplexor driver
[ 4464.009404][T26232] ip_gre: GRE over IPv4 tunneling driver
[ 4523.683291][T26804] ip6_gre: GRE over IPv6 tunneling driver
[ 4550.128287][T27053] ping (27053) used greatest stack depth: 23360 bytes left
[ 4565.796653][    C1] ip6_tunnel: tep0 xmit: Local address not yet configured!
[ 4571.939570][    C2] ip6_tunnel: tep0 xmit: Local address not yet configured!
[ 4577.060570][    C2] ip6_tunnel: tep0 xmit: Local address not yet configured!
[ 4583.011588][    C2] ip6_tunnel: tep0 xmit: Local address not yet configured!