[ 4518.763710][T21570] gre: GRE over IPv4 demultiplexer driver
[ 4520.455884][T21593] ip_gre: GRE over IPv4 tunneling driver
[ 4571.261194][T22169] ip6_gre: GRE over IPv6 tunneling driver
[ 4594.071426][T22418] ping (22418) used greatest stack depth: 23440 bytes left
[ 4607.664264][    C1] ip6_tunnel: tep0 xmit: Local address not yet configured!
[ 4612.849181][    C2] ip6_tunnel: tep0 xmit: Local address not yet configured!
[ 4617.392311][    C1] ip6_tunnel: tep0 xmit: Local address not yet configured!
[ 4622.641156][    C0] ip6_tunnel: tep0 xmit: Local address not yet configured!