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Due to VCAP limitation, ARP flow entry will generate an error once combinated-mode is enabled.

When combinated mode is enabled, VCAP needs to match the same fields as ICAP. ARP flows use UDF in ICAP, but not all HW platforms support UDF in VCAP.

Example:

ovs-vsctl set-combinated-mode true
admin@PicOS-OVS$ovs-ofctl dump-flows br2
OFPST_FLOW reply (OF1.4) (xid=0x2):
 cookie=0x0, duration=70.192s, table=0, n_packets=n/a, n_bytes=0, priority=500,arp actions=output:2
 cookie=0x0, duration=6.928s, table=0, n_packets=n/a, n_bytes=0, priority=200,in_port=7 actions=push_vlan:0x8100,set_field:2001->vlan_vid,output:8

Actual result:

sent packets match both flows to ge-1/1/7,ge-1/1/2 will receive packets that with "push_vlan:0x8100,set_field:2001->vlan_vid",ge-1/1/8 will not receive any packets.

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