[ 4454.456308][T25991] gre: GRE over IPv4 demultiplexor driver
[ 4456.491952][T26015] ip_gre: GRE over IPv4 tunneling driver
[ 4516.207914][T26587] ip6_gre: GRE over IPv6 tunneling driver
[ 4523.064754][T26649] ping (26649) used greatest stack depth: 23696 bytes left
[ 4542.353917][T26842] ping (26842) used greatest stack depth: 23088 bytes left
[ 4557.688777][    C3] ip6_tunnel: tep0 xmit: Local address not yet configured!
[ 4563.512684][    C1] ip6_tunnel: tep0 xmit: Local address not yet configured!
[ 4568.376704][    C2] ip6_tunnel: tep0 xmit: Local address not yet configured!
[ 4574.264724][    C3] ip6_tunnel: tep0 xmit: Local address not yet configured!
[ 4788.307721][T29156] ping (29156) used greatest stack depth: 23072 bytes left