Learn how to a build a cloud-first strategyRegister Now

  • Status: Solved
  • Priority: Medium
  • Security: Public
  • Views: 236
  • Last Modified:

VM network Properties

Hello Experts,

 I wanted to understand below concepts in VMWare networking
1). When we add port group to vSwitch which has 2 NIC's. Suppose if one of the NIC goes office , how VM will understand to switch to other NIC which is online (I am asking about the VM which had a connection to the NIC which went offline). Is there any function set ? Algorithm?

2).Active/Standby --> If we have defined this setting , will ESXi choose Standby automatically if Active adapter goes down? what happens if the Offline adapter comes back online ?WIll it act as standby or it will replace one of the adapter and become active adapter.

3). Do we have some tool which help us in monitoring the network traffice in VMWare ESXi host?


-Prashant Girennavar.
Prashant Girennavar
Prashant Girennavar
1 Solution
Andrew Hancock (VMware vExpert / EE MVE^2)VMware and Virtualization ConsultantCommented:
1. The VM does not switch it, the hypervisor monitors the physical nics, and switches the ports. The VM is completely unaware of the upstream vSwitch configuration.

2. Yes. it should switch back to the defined configuration.

3. Yes, we use this

One of the biggest management holes in vCenter of ESX is the vSphere Client can indicate that VM network traffic is causing a 1 GB Ethernet adapter to have a 99% utilization rate. But strangely, it doesn't display which kind of traffic is going across the virtual networks, where it came from or where it's going.

To learn which traffic is going across a virtual network, there's another free tool for vSphere: Xangati for ESX, a virtual appliance that tracks conversations on the virtual network. It's great for troubleshooting any virtual network issue, analyzing virtual desktop infrastructure and correlating vCenter performance stats with virtual network stats.

and then you can really check what traffic from your VMs for free is causing network issues.

It's available as a fanastic FREE download here.

Prashant GirennavarAuthor Commented:
That helps.


-Prashant Girennavar.

Featured Post

Get free NFR key for Veeam Availability Suite 9.5

Veeam is happy to provide a free NFR license (1 year, 2 sockets) to all certified IT Pros. The license allows for the non-production use of Veeam Availability Suite v9.5 in your home lab, without any feature limitations. It works for both VMware and Hyper-V environments

Tackle projects and never again get stuck behind a technical roadblock.
Join Now