Question on ESXi trunking and frames details

shanparames

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

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!

d4nz1g

shanparames wrote: »

Physical Switch Will be learning VMs MAC address and updating MAC table with only VMs MAC address.

there's not much else to say

Goldenrose

There are three methods of VLAN tagging that can be configured on ESXi/ESX:

• External Switch Tagging (EST)
• Virtual Switch Tagging (VST)
• Virtual Guest Tagging (VGT)

have a look at:
https://kb.vmware.com/s/article/1004074

scott28tt

Goldenrose wrote: »

There are three methods of VLAN tagging that can be configured on ESXi/ESX:

• External Switch Tagging (EST)
• Virtual Switch Tagging (VST)
• Virtual Guest Tagging (VGT)

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.

scott28tt

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.

shanparames

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

Goldenrose

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.