Port mirroring to a trunk port with a VM sniffer on tagged Vlan
We are trying to setup a mirror source port where the Meraki FW is attached and send the mirrored traffic to a trunk port where a virtualization host is connected which has a sniffer VM on a tagged Vlan. The first attempt for the mirroring caused all of the other tagged Vlan traffic to fail. The switch is an MS250-48LP with firmware MS11.30
Mirroring a port copies everything on one port to another port. All tags will also be copied. It wont strip the tags or somehow replace them with a new single tag.
So the destination port should not be an existing port being used for something else.
You'll need to connect this destination port up to a new different NIC on your VMWare server (should be part of a different vSwitch). The VM itself will need to be configured to use promiscuous mode in VMWare.