[ 3162.093593][T27728] gre: GRE over IPv4 demultiplexor driver
[ 3163.172213][T27751] ip_gre: GRE over IPv4 tunneling driver
[ 3177.295863][T28003] ping (28003) used greatest stack depth: 22880 bytes left
[ 3197.576419][T28323] ip6_gre: GRE over IPv6 tunneling driver
[ 3209.404197][T19982] ip6_tunnel: tep1 xmit: Local address not yet configured!
[ 3221.243513][    C2] ip6_tunnel: tep0 xmit: Local address not yet configured!
[ 3224.956526][    C1] ip6_tunnel: tep0 xmit: Local address not yet configured!
[ 3228.092533][    C3] ip6_tunnel: tep0 xmit: Local address not yet configured!
[ 3231.739514][    C2] ip6_tunnel: tep0 xmit: Local address not yet configured!