Friday, March 5, 2021

[ INTERVIEW QUESTION ] Monitor network traffic for a VM.

Impressive answer! Quest: You want to monitor network traffic and tried to capture network traffic for a VM, but you couldn't see the expected traffic in the packet capture tool. What should you do to resolve the problem? Your best answer... If I need to capture network traffic for a VM, I should Enable Promiscuous Mode on the relevant port group. Then I can capture the network traffic by using any networking traffic capturing tool.

It is important to make a good impression on whoever is interviewing you. You can also mention... Promiscuous mode is disabled by default, and it should not be turned on unless it's required. A tool running inside the virtual machine may be able to monitor any and all traffic moving across a vSwitch if it is allowed to enter promiscuous mode.

Moreover, most likely I need to set the VLAN 4095 at the port group level, which allows the port group to see the traffic on any VLAN while leaving the VLAN tags intact.


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