[ovs-discuss] Frames are dropped if its input port and output port are the same

[Hans Yu]

Hi,

I noticed that my Ethernet frames are dropped when their input ports are
the same as their output ports. Even though I have the right rule installed
on to Open vSwitch bridge from my controller, they still get dropped.

Here is the output from ovs-ofctl:
$ sudo ovs-dpctl dump-flows
NXST_FLOW reply (xid=0x4):
 cookie=0xa0000b648a713, duration=30.453s, table=0, n_packets=30,
n_bytes=2940, idle_age=0,
priority=10,in_port=1,dl_src=a0:ce:c8:03:2f:bf,dl_dst=a0:ce:c8:02:e9:e1
actions=output:1

And here is the output from ovs-dpctl:
$ sudo ovs-dpctl dump-flows
recirc_id(0),in_port(3),eth(src=a0:ce:c8:03:2f:bf,dst=a0:ce:c8:02:e9:e1),eth_type(0x0800),ipv4(src=
0.0.4.0/0.0.4.0,dst=0.0.4.0/0.0.4.0,frag=no), packets:17, bytes:1666,
used:0.711s, actions:drop

Since I need an implementation which allows input port and output port of
the frame to be the same, I wonder where I can make those frames not get
dropped but sent out from their incoming port.

Best,

Hans
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