how to setup OVS bridge SPAN port (port mirror)

[lkthomas]

I have a few VMs running on vmbr9011 which is the OVS bridge, and I would like to mirror ALL traffic that happens in vmbr9011 to vmbr9020: tap158i6, and vmbr9020 also a OVS bridge, they are all in the same Proxmox server just on different OVS bridge, I tried these commands and didn't seems to forward any traffic to the tap158i6 interface as I tried to run tcpdump,

BRIDGE_UUID=$(ovs-vsctl get Bridge vmbr9011 _uuid)
DEST_PORT_UUID=$(ovs-vsctl get Port tap158i6 _uuid)

ovs-vsctl -- --id=@p get Port $DEST_PORT_UUID \
          -- --id=@m create Mirror name=mirror0 select-all=true output-port=@p \
          -- add Bridge $BRIDGE_UUID mirrors @m
d4c1c6ff-80e2-4fb6-a864-43ed2a637ded
root@vm-1:~# ip link set  tap158i6 promisc on
root@vm-1:~# ovs-vsctl list Mirror
_uuid               : d4c1c6ff-80e2-4fb6-a864-43ed2a637ded
external_ids        : {}
name                : mirror0
output_port         : 3927226f-0db2-4e50-8eed-1d98268c9bdd
output_vlan         : []
select_all          : true
select_dst_port     : []
select_src_port     : []
select_vlan         : []
snaplen             : []
statistics          : {}

So what went wrong?