[ovs-dev] Question about ovs megaflow with move NXM_OF_IP_DST actions

[Lilijun (Jerry, Cloud Networking)]

Hi all,

In my test, add one flow to br-ovs, and running one vm connected this br-ovs:
cookie=0x0, duration=286.272s, table=31, n_packets=2, n_bytes=196, idle_age=161, priority=61010,ip,metadata=0x2b193,dl_dst=00:00:00:04:06:03 actions=move:NXM_OF_IP_DST[]->NXM_NX_REG0[],load:0x8439ce602f->OXM_OF_METADATA[],resubmit(,32)

when sending packets with random source ip addr from vm, I found many datapath exact flows are gernerated instead of one megaflow entry. One source ip generate on exact flow.

What's the megaflow match policy about move:NXM_OF_IP_DST?  Why we don't using megaflow wildcard on the openflow actions of move:NXM_OF_IP_DST[]?

Thank you!

B.R.
Lilijun