Mirror Port on Core Switch not seeing other traffic from edge switches

[floyd.scott1]

We have created a Mirror (Span) port on our Core switch in order to see all traffic on the network, however, we are actually only seeing very little traffic. I would say only about 10-15 percent of the network devices and traffic. There are rough, 50 edge switches connected to the core with around 400 devices total. Is there a configuration I need to make on the edge switch to send all data up to the Core?

[Reza Sharifi]

Are you trying to SPAN all the vlans on the core? If that is the case, than on the core, the source could be all the vlans and destination a separate port. Also, can you post the config from the core?

HTH

[floyd.scott1]

Yes, this is a small flat network spanning VLAN 1. Config uploaded shortly.

[balaji.bandi]

depends on where you span configured, if all the devices are connected to same Core switch, you can SPAN port on uplink port so you can have more visbility, i wish to see your exiting config and some information as you mentioned 10-15% traffic ?