Starting with vSphere Distributed Switch 5.0, you can enable port mirroring. Port mirroring is a functionality that allows the replication of network traffic on a port (source) to another port or uplink (destination) on the VDS. This is particularly useful when you have a packet analyzer or Intrusion Detection System (IDS) deployed on the network. Port mirroring can only be enabled on a vSphere Distributed Switch and not on a vSphere Standard Switch.
Identify the virtual machine on which you have the packet analyzer installed, as this information is needed when you configure port mirroring.
The following procedure explains how to enable port mirroring on a VDS: