When mirroring packets between two VLANs, we have observed that the OVS mirror packet transmit statistics as displayed by the "ovs-vsctl list mirror show tx packets" command is not correct.
We have configured OVS mirror to mirror all the packets transmited/received on two VLANS (21 and 22) to a VM virtual NIC connected to VLAN 30. We have confirmed that this mirror works both by looking at the OVS mirror statistics and by dumping the packets within the mirror destination VM. We are using the following command to configure this mirroring: $ ovs-vsctl -- set bridge pm-br mirrors=@m -- --id=@m create mirror name=36 select_all=true select-vlan=21,22 output-vlan=30 But when we transmit packets on a VLAN that is not configured for mirroring (e.g VLAN 10) on the same bridge we see that the OVS mirror statistics still go up. We expected that as this VLAN is not configured for mirroring, the mirror packet statistics will not go up. This issue was not seen in OVS version 2.3.2 and before but seen with 2.5.2 and after. Is this a known issue? Any help in debugging this will be appreciated.
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