Contents
What is port mirroring in switch?
Port mirroring is the network switch ability to send a copy of network data packets being transmitted over a switch port to a network monitoring or inspection device that is itself connected to the port mirror – a dedicated port on the switch.
Why is port mirroring used?
Port mirroring is used on a network switch to send a copy of network packets seen on one switch port (or an entire VLAN) to a network monitoring connection on another switch port. It helps administrators keep a close eye on network performance and alerts them when problems occur.
What is port mirroring and how does it work?
The concept behind port mirroring is quite simple. When you configure a switch, you reserve one port. Then you configure the switch to “mirror” all traffic that passes through to that reserved port. Whenever the switch processes a packet, it makes a copy and sends it to whatever is connected to the aforementioned port.
How is port mirroring used in a VM?
Port mirroring allows you to mirror a distributed port’s traffic to other distributed ports or specific physical switch ports. Port mirroring is used on a switch to send a copy of packets seen on one switch port (or an entire VLAN) to a monitoring connection on another switch port.
Can a N-VDS switch allow port mirroring?
However, in NSX-T, by default, Normal I/O on Destination Ports is set to Allowed. In NSX-T, port mirroring configured for NSX port groups on an N-VDS switch allows teaming and port mirroring on destination ports.
How to configure port mirroring for network traffic?
For port mirroring, configure port mirroring for each domain controller to be monitored, as the source of the network traffic. Typically, you need to work with the networking or virtualization team to configure port mirroring.
How to use VDS for monitoring virtual machine traffic?
All packets flowing through the monitored virtual machine are now copied through the vmnic1 to the physical switch port. On the same physical switch the analyzer is connected to a different port. The analyzer connected to a port on the same switch is not going to see the traffic mirrored by VDS.