Question on ESXi trunking and frames details

shanparamesshanparames Posts: 87Member ■■□□□□□□□□
Hi,

I have posted the question from Vmware ESXi standpoint but it is more of networking stuff . That is why I posted here .Anybody please answer with the details in Cisco way
InterviewQuestionAnswer.jpg
Brief explanation of Above mentioned Scenario:

There are three VMs connected to vSwitch.
VM1 Mac Adress is AA
VM2 Mac Address is BB
VM3 Mac Address is CC
vmnic0 is uplink connected to Physical Switch Port ( Let’s say 0/1).
This Uplink Mac Address is XX.

The question here is


How Physical Switch will be processing VMs Packets coming from vSwitch and goes on Wire.

  1. Physical Switch will be masking all VMs MAC address with Uplink Mac Address(XX) ( similar to NAT implementation)
  2. Virtual Switch will be masking all outgoing VMs MAC address with Uplink Mac Address
  3. Physical Switch Will be learning VMs MAC address and updating MAC table with only VMs MAC address.
  4. Physical Switch will having both VM MAC address and Uplink Mac Address in its MAC table

Any advice is highly appreciated!
Thanks,

Regards

S.Swaminathan

Comments

  • d4nz1gd4nz1g Posts: 464Member
    Physical Switch Will be learning VMs MAC address and updating MAC table with only VMs MAC address.

    there's not much else to say
  • GoldenroseGoldenrose Posts: 11Member ■□□□□□□□□□
    There are three methods of VLAN tagging that can be configured on ESXi/ESX: have a look at:
    https://kb.vmware.com/s/article/1004074
  • scott28ttscott28tt Posts: 655Member ■■■■□□□□□□
    Goldenrose wrote: »
    There are three methods of VLAN tagging that can be configured on ESXi/ESX: have a look at:
    https://kb.vmware.com/s/article/1004074
    That’s true, but I didn’t see this as a question about VLANs.
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  • scott28ttscott28tt Posts: 655Member ■■■■□□□□□□
    3

    You’re connecting a switch to a switch, with the vmnic as the uplink port - it’s own MAC address is irrelevant.

    Think of the vmnic as being the physical interface of the virtual switch.
    VCP2 / VCP3 / VCP4 / VCP5 / VCAP4-DCA / VCI / vExpert 2010-2012
    Blog - http://vmwaretraining.blogspot.com
    Twitter - http://twitter.com/vmtraining
    Email - [email protected]
  • shanparamesshanparames Posts: 87Member ■■□□□□□□□□
    scott28tt wrote: »
    3

    You’re connecting a switch to a switch, with the vmnic as the uplink port - it’s own MAC address is irrelevant.

    Think of the vmnic as being the physical interface of the virtual switch.


    Thanks for all your replies
    Thanks,

    Regards

    S.Swaminathan
  • GoldenroseGoldenrose Posts: 11Member ■□□□□□□□□□
    scott28tt wrote: »
    That’s true, but I didn’t see this as a question about VLANs.
    Well, the process of tagging depends on the location the tagging is done. If it is done in the vm, the hypervisor is doing the job and if it is in the dvport the vDS. Correct me if I am wrong.
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