Moving vSAN traffic to a new network

cargex used Ask the Experts™
Hi Guys,
I need to move 3 ESXi Servers Cluster to a new location, these 3 ESXi Servers are currently part of a vSAN connected to a Cisco Stack.
In essence the difficulty lies in the fact that I have to leave the Cisco Stack behind ergo I need to configure a new Switch to run the vSAN.

Current setup, 3 ESXi hosts running vSAN with two 10 GbE nic in each one. Each couple of Ethernet connections go to a different Cisco Switch in a Stack. So we have:
ESXi_1 has 2 Ethernet cables going to two different 10 Gb ports in Switch_1
ESXi_2 has 2 Ethernet cables going to two different 10 Gb ports in Switch_2
ESXi_3 has 2 Ethernet cables going to two different 10 Gb ports in Switch_3
And all three switches are part of the same stack.

The 3 ESXi hosts are going to be moved to a data center and the Cisco Stack is going to stay in the local office server room.

I’m thinking maybe I can purchase the Cisco SG350XG and move all the 6 Ethernet connections from the current Stack to this new Cisco Switch. Then just move the whole thing, ESXi hosts Servers and new Cisco Switch to the Data Center.

Am I in the right track here?

What should I have in mind when configuring the new Cisco Switch for the vSAN?

When the time comes will it be just the steps below?
1.      Shutdown the VMware cluster
2.      Move the Ethernet cables from the Cisco Stack to the new Cisco Switch
3.      Turn on the VMware cluster
4.      The end

Thanking you in advance,
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Andrew Hancock (VMware vExpert / EE Fellow)VMware and Virtualization Consultant
Fellow 2018
Expert of the Year 2017

1. It must support MULTICAST
2. it must be 10GBe.

You can prepare all this in advance, just create new VMKernel Interfaces, and ensure all communicate, via a different IP network. (vlan).

turn off VMs, if in use, then select this new VMKernel Interfaces for use with vSAN traffic, turn off the old, and then your done.


Hi Andrew,
Pardon my vSAN ignorance but I have to ask.

I’m planning to use the Cisco SG350XG switch that comes with 12 10GBe ports.

What would happen if I configure the same vlan the vSAN is currently using in this new Cisco Switch, and then turn off the VMware cluster, connect the 6 Ethernet cables that the vSAN is using to 6 ports in this new Switch, and then turn on the cluster.

Would the current VMKernel interfaces work?
VMware and Virtualization Consultant
Fellow 2018
Expert of the Year 2017
Yes, it will work, make sure multicast is not disabled. vSAN will soon tell you if it is, it will not be able to communicate between servers.

Do you even need to create a VLAN for this switch ?

if so make sure the physical switch configuration is correct, and includes this VLAN, not sure if you are using Tagged or Untagged VLANs, on your VMKernel Interfaces.


Hi Andrew,
For now I just wanted to make sure I can buy the new Cisco switch as a solution, I will ask for the actual configuration changes details when the new Switch arrives.

Also, if you could please take a look at my other VMware question I have open and give me your opinion that would be greatly appreciated.


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