[ 1500.084380][T22129] gre: GRE over IPv4 demultiplexer driver
[ 1500.530264][T22152] ip_gre: GRE over IPv4 tunneling driver
[ 1515.234046][T22723] ip6_gre: GRE over IPv6 tunneling driver
[ 1520.309794][T22972] ping (22972) used greatest stack depth: 23208 bytes left
[ 1524.923222][    C2] ip6_tunnel: tep0 xmit: Local address not yet configured!
[ 1526.842194][    C1] ip6_tunnel: tep0 xmit: Local address not yet configured!
[ 1528.635187][    C3] ip6_tunnel: tep0 xmit: Local address not yet configured!
[ 1530.554206][    C1] ip6_tunnel: tep0 xmit: Local address not yet configured!