sniff traffic how
My boss wants to check the Layer 2 traffic and other stuff by connected a cable directly from our Netscout to the Charter Gateway LAN side to sniff. I said we could setup a vlan for sniffing and since our core has a trunk line to the DMZ switch in the room of the Charter gateway, we setup a vlan on the dmz switch that matches the vlan on the core and sniff that vlan stratight across the trunk lines. He says the Netscout willl pick up traffic aross all the vlan trunk? I said no it wont it will only sniff traffic in the vlan access port you set the Netscout too? Am I wrong. He said it will pick up unecessary traffic. i said how is that it is a vlan that we setup with no routing on it? just a vlan and it will just be a designated vlan pipe so to speak straight to the charter lan interface and all you get is Layers. He wants to hook directly to the LAN port via cable from the Netscout direct. What am i missing. what are the pros and cons guys from your experience. I mean I like his idea but thought a vlan would work fine?