What is port mirroring used for?

Port mirroring is a method of copying and sending network packets transmitted as input from a port to another port of a monitoring computer/switch/device. It is a network monitoring technique implemented on network switches and similar devices.

How do I setup port mirroring?

Click Add Port Mirror for each port mirror that you want to configure.

Select a Monitor Port from the available list.
Select a Mirroring port from the available list.
Select one of the available options from the Traffic Direction list to indicate the monitoring direction of the packets.

What is port forwarding and port mirroring?

Local port mirroring is the most basic form of mirroring. The source port forwards the packet copy to the destination port through the uplink connection achieved by the port (Eth 1/4) on the two switches. Therefore, local port mirroring can realize the data monitoring and analysis across devices.

What is Cisco port mirroring?

Switched Port Analyzer (SPAN), which is also called port mirroring, or traffic mirroring enables you to monitor network traffic passing in, or out of, a set of ports. You can then pass this traffic to a destination port on the same router.

What is SPAN or mirror port?

A SPAN port (sometimes called a mirror port) is a software feature built into a switch or router that creates a copy of selected packets passing through the device and sends them to a designated SPAN port. Using software, the administrator can easily configure or change what data is to be monitored.

Can the switch screen mirror?

Some games, such as the Nintendo Switch, feature both mobile handheld gameplay and console game play. Now there is an easy way to wirelessly “screen mirror” your mobile game on to your TV. This is also called wireless display.

What is TAP port?

The two most common ways of accessing monitoring data are through either a switched port analyzer (SPAN) port or a test access port (Tap). A tap is a purpose-built device that passively makes a copy of network data but does not alter the data. Once you install it, you are done. No programming is required.

What is port mirroring, and what is it used for?

Switch traffic processing. A very small network would only have one switch or hub.

Switches and hubs.

Port mirroring with a hub.

Port mirroring with a switch.

Duplicating all network traffic.

About Cisco SPAN switches.

Cisco SPAN modes.

Cisco SPAN availability.

Set up SPAN on IOS switches.

Set up SPAN on CatOS switches.

How to configure port mirroring on different switches?

– Requirements. Before you configure port mirroring, be sure you have an understanding of port mirroring concepts. – Overview and Topology. – Mirroring All Employee Traffic for Local Analysis. – Mirroring Employee-to-Web Traffic for Local Analysis. – Verifying That the Analyzer Has Been Correctly Created.

How to port mirroring on Cisco switch?

Log into the switch through the CNA interface.

Select the Smartports option in the CNA menu.

Click on the port that you want to connect the packet sniffer to and select the Modify option.

Select Diagnostics in the Role list and select the port that will have its traffic monitored from the Source drop-down list.

How to configure SonicWall port mirroring?

Navigate to the Network|Interfaces page.

Click on Configure on any one interface.

Choose zone as LAN.

Set Mode/IP Assignment as Wire Mode (2-Port Wire)

Set Wire Mode Setting to Inspect Mode (Passive DPI of Mirrored Traffic)

Choose an unassigned interface under Set Paired Interface.