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TAPs in virtualization

Posted on 2017-09-13
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Last Modified: 2017-09-15
I am investigating the use of TAPs in virtualization for capturing data from VMs.

I am interested in two methods.

Virtual Taps within the VMware using Network vSwitch (standard and distributed)
and
Physical TAP that would be connected to the ESXi Host or switch or both.

First, for virtual taps.

On a standard vSwitch on one ESXi host, I think that promiscuous mode will need to be set on a port group?  If I have a VM on vSwitch2 that is connected to ESXi nic2 and a VM on vSwitch3 connected to ESXi nic3, what is process to capture data from the VMs?

Distributed Switch,
If the Distributed Switch called d_vSwitch1 is set up for two ESXi Servers, ESXi-1 and ESXi-2, and VMs are on a Distributed Port Group called Data-A1, what is process to capture data from the VMs?

Second, for a physical tap

If I have this old nTap (pic attached), how can it be used to capture traffic data coming into ESXi-1 from ESXi-2?

Also, for another use case, instead of using a virtual tap, could I use the old nTap to capture traffic data between the VM on vSwitch2 that is connected to ESXi nic2 and a VM on vSwitch3 connected to ESXi nic3

ntap.jpg
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Question by:sjniii
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4 Comments
 
LVL 123
ID: 42293201
Port Mirror is the method to use for vSwitches
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by:sjniii
ID: 42294378
i believe port mirroring is only for the Distributed Switch not the Standard Switch based on eh little I read.

Also, I am looking for info on how to configure a test for using

virtual taps on a standard switch
virtual taps on a distributed switch
physical tap (like the old nTAP)  - in the environment is it connected to the physical nics on an esxi host or to a switch or both?
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LVL 123
ID: 42294400
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by:sjniii
ID: 42295395
thanks ...i also found a few other articles with a search similar i can post here if there is interest.

However,  any info on using a Physical Tap in conjunction with ESXi Servers?
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