[ 1313.730155][T28652] gre: GRE over IPv4 demultiplexer driver
[ 1314.183322][T28675] ip_gre: GRE over IPv4 tunneling driver
[ 1329.086300][T29247] ip6_gre: GRE over IPv6 tunneling driver
[ 1335.973772][T29595] ping (29595) used greatest stack depth: 23208 bytes left
[ 1338.788978][    C2] ip6_tunnel: tep0 xmit: Local address not yet configured!
[ 1340.708944][    C3] ip6_tunnel: tep0 xmit: Local address not yet configured!
[ 1342.499945][    C1] ip6_tunnel: tep0 xmit: Local address not yet configured!
[ 1344.419974][    C2] ip6_tunnel: tep0 xmit: Local address not yet configured!