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Alternatives For Handling VMs Effectively Over A VMware vDS Migration

If you are thinking to opt for a live migration of virtual machines (VMs) without any downtime from a standard switch to a VMware vDS, well there are options to do so.

In order to simplify the process, interruption on VMware vDS migration is one such method. But on the other hand, migrating the VMs directing to another host will not really solve the purpose as the port group will not exist when you try to bring the VMs back with vMotion.

VMware

Before all it is necessary to clarify the crucial point that the load balancing algorithm used in VMware vDS migration case is route based on IP hash. It is been configured on a standard virtual switch.

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You must be wondering how VMs can be powered down. The link aggregation groups (LAG) physical switch does not require any changes at downtime. Active adapters such as vmnic0, vmnic1 and vmnic2 are being used as the standard switch and are in an LAG.

If you eventually separate them from the standard switch and join them to the distributed switch; you will be successful in disconnecting the host to the standard switch.

By performing the above process the three physical network interface cards (NICs) are connected to the distribution switch, the virtual machines can be connected to the port group on the distributed switch, and they will be on the network again.

Now let’s clear out the concept that VMs need to stay powered on. It is always better to start the VMs by disabling the IP hash algorithm on the vSwitch. Nevertheless, there is no need to change the physical switch while removing two NICs from the switch.

Try to perform the following procedure during off-peak hours as it may affect the available bandwidth of VMware vDS migration. Add the two NICs to the distributed switch — which is also in the default load balancing, no LACP (Link Aggregation Control Protocol) and connect the VMs from the old port group to the new port group.

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When they are all moved to the distributed switch, remove the last NIC and add it to the distributed switch and configure LACP and the IP Hash load balancing algorithm on the distributed switch.

VMware distributed switch

The Final Forefront for VMware vDS Migration

A vNetwork Standard Switch brings out numerous vNetwork Distributed Switches. They can be accomplished with any of the two ways:

1. Using only the vDS User Interface (vDS UI) — Hosts are migrated one by one by following the New vNetwork Distributed Switch process under the Home > Inventory > Network view of the Datacenter from the vSphere Client.

2. Using a combination of the vDS UI and Host Profiles— The first host is migrated to vDS and the remaining hosts are migrated to vDS using a Host Profile of the first host.

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