vmmedmed
Enthusiast
Enthusiast

How to migrate servers into NSX

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Currently the router for my server VLANs is a layer 3 Cisco Nexus switch. The VMs are on Cisco UCS blades with hypervisors and there is trunking between the Nexus switch and the UCS fabric. Let's assume that my current server VLAN 10 subnet is 10.10.10.0/24 and the gateway 10.10.10.1. We implement an NSX edge on network 10.10.200.0 and the route out of NSX is 10.10.200.1 on the Nexus switch and path into NSX 10.10.200.2. 

When we implement the NSX - what would be the common method to migrate all the hosts on my server subnet 10.10.10.0/24? Would it more likely be the case that I'd create a new VLAN and subnet within NSX say 10.10.210.0/24 vlan 210? How would the VMs then see the new VLAN 210 as that is currently provisioned by the Nexus and the UCS? 
Or as opposed to moving all the servers to a new VLAN/Subnet might there be a means to migrate the entire VLAN to be within NSX which would avoid the re-addressing? 

Thank you for any insight as I've never done one of these migrations before. I've only been a NSX user that had already been previously setup. TY

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Sreec
VMware Employee
VMware Employee

If you want to retain the same IP address, you can simply shut down the SVI interfaces on Nexus and migrate all VM's from VLAN-backed networks to NSX Overlay networks. Later once the workload validation is completed you can remove the Server VLANs from the UCS profile and both the nexus. In a nutshell, you can create an NSX set up in advance with routing with Nexus and ensure all new Portgroups are available for workloads ( overlay backed) that way you can save some time during the migration process. If you want to roll back for whatever reason, shutdown/disconnect NSX gateway interfaces and migrate the VM's back to the VLAN-backed port group.

Cheers,
Sree | VCIX-5X| VCAP-4X| VExpert 6x|Cisco Certified Specialist
Please KUDO helpful posts and mark the thread as solved if answered

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Sreec
VMware Employee
VMware Employee

If you want to retain the same IP address, you can simply shut down the SVI interfaces on Nexus and migrate all VM's from VLAN-backed networks to NSX Overlay networks. Later once the workload validation is completed you can remove the Server VLANs from the UCS profile and both the nexus. In a nutshell, you can create an NSX set up in advance with routing with Nexus and ensure all new Portgroups are available for workloads ( overlay backed) that way you can save some time during the migration process. If you want to roll back for whatever reason, shutdown/disconnect NSX gateway interfaces and migrate the VM's back to the VLAN-backed port group.

Cheers,
Sree | VCIX-5X| VCAP-4X| VExpert 6x|Cisco Certified Specialist
Please KUDO helpful posts and mark the thread as solved if answered
vmmedmed
Enthusiast
Enthusiast

Fantastic thank you. And now those terms are come back to me like NSX Overlay. All best.

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