Yup, Tried that. Incoming interface is set as:

interface Ethernet1/37
switchport mac-learn disable
description tor-31-1 ge-0/0/44 SPAN
switchport mode trunk
switchport trunk allowed vlan 2,999
ip access-group DROP out

Outbound interfaces are set to:

interface Ethernet1/46
description MON1
switchport access vlan 999

The issue is that the traffic coming in, is coming from a Juniper switch where the traffic has vlan tags on the packets.

On Mon, Oct 7, 2019 at 1:07 PM Nick Hilliard <nick@foobar.org> wrote:

Dovid Bender wrote on 07/10/2019 17:56:
> We used cisco in the past. The issue we have is the switches that will
> mirror to more than one port have fans pushing the heat into the cold
> isle. From what I was able to see Cisco does not have any AFO switches
> that will mirror to more than one port.

um, really? Have you tried disabling mac learning? This will cause all
traffic to be unicast flooded to multiple ports.

Nick