[ 3543.523070][T20515] gre: GRE over IPv4 demultiplexor driver
[ 3545.660919][T20539] ip_gre: GRE over IPv4 tunneling driver
[ 3609.722394][T21111] ip6_gre: GRE over IPv6 tunneling driver
[ 3637.053359][T21360] ping (21360) used greatest stack depth: 22352 bytes left
[ 3653.306871][    C2] ip6_tunnel: tep0 xmit: Local address not yet configured!
[ 3659.386809][    C1] ip6_tunnel: tep0 xmit: Local address not yet configured!
[ 3664.505778][    C2] ip6_tunnel: tep0 xmit: Local address not yet configured!
[ 3670.393798][    C1] ip6_tunnel: tep0 xmit: Local address not yet configured!