Upload will start & generally it will couple of minutes to upload the ESXi 5.5 ISO image to vSphere update manager 5.5 server.
Now you will see uploaded ISO image. as shown below.
Now select the host which you want to upgrade & Click on update manager->Attach to attach uploaded ISO file & Click on “Attach”
Select ESXi 5.5 baseline which we created while uploading ISO image.
After attaching baseline to ESXi host. Now click on “Scan” to scan for upgrades.
Select “Upgrades” when you click on Scan.
After scan, click on “Remediate” option. Attach the created baseline as shown below.
Now server upgrade has been stared. ESXI 5.1 to 5.5 generally takes 10 to 15 minutes. So relax & wait for upgrade. After upgrade from 5.1 to 5.5 ESXi server will give you a pop up that server has been upgraded from 5.1 to 5.5 & Click ok to continue. When you click on “OK” server will reboot & you will be ready to use new ESXi 5.5.
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