During troubleshooting vrouter flow related issues, logs with Drop Reason VP_DROP_CLONED_ORIGINAL may be seen as an output of "dropstats --log 0" command in contrail-tools utility. These logs can be safely ignored.

(contrail-tools)[root@compute]$ dropstats --log 0
**********PKT DROP LOG**********
Total No. of CPU's <value>
Pkt Drop Log for Core 1

sl no: 0  Epoch Time: ***** Local Time: *****
 Packet Type: 2  Drop reason: VP_DROP_CLONED_ORIGINAL  Vif idx: 0  Nexthop id: 0  Src IP: <IP>  Dst IP: <IP>  Source port: 0  Dest port: 0  file: VR_FRAGMENT_C  line no: 405  Packet Length: 0  Packet Data: 

logs with Drop Reason VP_DROP_CLONED_ORIGINAL may be seen as an output of "dropstats --log 0" command in contrail-tools utility.

VP_DROP_CLONED_ORIGINAL drop is internal tracking counter which is maintained for the internal purpose. It is harmless and can be ignored.