The procedures in this section add the necessary steps to migrate an existing Layer 2 network to a PowerOne system.
Use whatever migration method is standard for your environment. For example, for cold migration options, power off the VMs and copy their folders through any available method:
Because some downtime occurs while ARP, MAC, and routing tables converge, migrate the Layer 3 switched virtual interfaces (SVIs) during a dedicated change control window.
After you migrate the VMs onto the PowerOne CRGs, you have to migrate the Layer 3 SVIs onto the PowerOne leaf switches as a distributed anycast gateway. One IP address must be allocated per leaf switch, plus the VIP. On a PowerOne system, you can choose the VIP address, but addresses are allocated to the leaf switches beginning with the first IP address in the VLAN (until the number of leaves are addressed). Thus, if the PowerOne system has two leaf switches, and you have a subnet of 172.20.20.0/24 and the defined gateway of 172.20.20.1, the following two IP addresses (.2 and .3) are allocated as physical IPs of the leaf switches for that network. Therefore, if you have nodes that use those IP addresses, you must re-IP them to another host address.
Migrate the Layer 3 SVIs as follows:
The following figure shows a Cisco NXOS example:
If you are using eBGP routing, the routes are automatically propagated from the PowerOne fabric to the devices.
After all migrations are complete, you can safely remove the uplink interfaces by using an API DELETE call, removing the port channel and all virtual network mappings: