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 Adding 2 different networks on a single NIC

Somnath Nandy's profile image
Somnath Nandy posted Jun 29, 2025 11:14 AM

Hi,

I have installed ESXi on 2 servers with a network having having IP range 192.168.111.0. Now customer is saying they also need 2 more networks having subnets 172.16.16.0 & 172.16.0.0. How I can add these 2 more subnets on the same network card? I am seeing many article on the same but not clear. Also shall I have to do this before installing vCenter server or I can do this later also?

Please help.

a_p_'s profile image
a_p_

That's actually a typical use case for using VLANs on the physical, and virtual side.
On the physical switch ports provide the required VLANs as tagged VLANS, and on the ESXi hosts create virtual port groups with the required VLAN-ID set.

André

Nathan Watts's profile image
Broadcom Employee Nathan Watts

what you will do here is allow the vLANS to the VM, essentially trunking the required vLANs to the VM.

Then within the VM you will need to setup additional interfaces and the VM will handle the VLAN tagging directly.

So you will end up with multiple interfaces/addresses attached to the same card and your VM Guest network config will specify the VLAN tag.

There is a trunking setting within the VM configuration.