Switched Port Analyzer (SPAN) sends copies of packets that enter or exit one port to another physical port or LAG interface, where the packets can be analyzed.
The analyzer is locally connected to the SPAN destination interface of the SLX device. Unlike a hub, which broadcasts any incoming traffic to all ports, the SLX device forwards traffic accordingly. If you want to snoop on the traffic that passes through a specific port, use port mirroring to copy the packets to a port connected to the analyzer.
You use the monitor session command to enable a SPAN session. With this command, you can set the packet source, the packet destination, and the packet direction (egress, ingress, or both).