This is planning in upgrading the VMware virtualization environment to ESXi 5.5. The current setup is 3 ESXi 4.1 hosts, all using DELL PowerEdge Servers, with PowerConnect 6248 switches, and DELL EquaLogic 61xx iSCSI SAN. DELL MD32xx storage also in use. So, each DELL server has 2-pair of iSCSI connections, one to Equalogic, and another one to DELL MD32xx. There are multiple VLANs. All ESXi 4.1 hosts are using Essential plus License.
Now, A new DELL PowerEdge Server is brought in, with 1 PowerConnect 48-port switch, 1 DELL Equalogic 61xx iSCSI SAN. How should I upgrade to ESXi 5.5? Shall I setup a new Virtualization environment with the newly-brought in hardware, and then move VMs over? Or can I straightaway upgrade the existing 4.1 ESXi hosts, and then introduce the new ESXi 5.5 host? the new license for ESXi 5.5 is Standard license.
Please help, appreciate very much. HA, vMotion must be part of the setup.