Data Center Virtualization Certification：VCP6.5-DCV Exam Guide

上QQ阅读APP看书，第一时间看更新

Configuring ERSPAN

VMware vDS provides industry-standard features to monitor the network traffic: port mirroring (Encapsulated Remote Switched Port Analyzer (ERSPAN)) and NetFlow (discussed later).

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. Port mirroring is based on ERSPAN standards.

Certain port mirroring functionalities in vSphere 5.1 and later depend on which version of vCenter Server and vSphere Distributed Switch, and which host you use, and how you use these aspects of vSphere together.

You can configure port mirroring using the vSphere Web Client, in the Configure tab of a vDS, in the Port mirroring menu. Just click on the New... icon:

Figure 2.24: Adding a port mirror session

There are different session types for the port mirroring:

Distributed Port Mirroring: Mirror packets from some VMs on one host to a VM on the same host. For more information see this blog post: https://blogs.vmware.com/vsphere/2013/01/vsphere-5-1-vds-feature-enhancements-port-mirroring-part-1.html.
Remote Mirroring Source: Mirror packets from some VMs on one host to a specific uplink port on the same host, with an external monitor system. For more information see this blog post: https://blogs.vmware.com/vsphere/2013/02/vsphere-5-1-vds-feature-enhancements-port-mirroring-part-2.html.
Remote Mirroring Destination: Mirror packets from VMs on one host to a VM on another host. For more information see this blog post: https://blogs.vmware.com/vsphere/2013/02/vsphere-5-1-vds-feature-enhancements-port-mirroring-part-3.html.
Encapsulated Remote Mirroring (L3) Source: Mirror packets from a number of distributed ports to the IP addresses of a remote agent. The virtual machine's traffic is mirrored to a remote physical destination through an IP tunnel.
Distributed Port Mirroring (legacy): Mirror packets from a number of distributed ports to a number of distributed ports and/or uplink ports on the corresponding host.

For more information, see the vSphere 6.5 Networking guide (https://docs.vmware.com/en/VMware-vSphere/6.5/com.vmware.vsphere.networking.doc/GUID-CFFD9157-FC17-440D-BDB4-E16FD447A1BA.html).