First, make sure you are deal with the server already in maintenance mode!!

To update or add drivers on existing ESX installations using esxupdate:

1. Power on the ESX host and log into an account with administrator capability.
2. Place the driver CD in the CD-ROM drive of the ESX host.
3. Mount the driver CD.
Example:  #: mount /dev/cdrom /mnt
4. Navigate to <cd mount point>/offline-bundle/ and locate the
   <offline-bundle>.zip file.
Example:  #: CD \mnt\offline-bundle
5. Run the esxupdate command to install drivers using the offline bundle.

   esxupdate --bundle=<offline-bundle>.zip update

unmount the iso
Example:  #: umount /dev/cdrom /mnt

Reboot the server.

To update or add drivers on existing ESXi by using vihostupdate.pl

1) extract Driver_offline_bundle-000000.zip from ISO file to C:\Program Files\VMware\VMware vSphere CLI\bin> where vihostupdate.pl reside

2) open vmware vsphere cli command prompt, cd to bin

3) at :\Program Files\VMware\VMware vSphere CLI\bin>, type vihostupdate.pl  --install --bundle Driver_offline_bundle-000000.zip
 
OR

1) scp vmware-esx-drivers-Driver_offline_bundle-000000.x86_64.rpm from the ISO file to ESXi

2) ssh to ESXi

3) rpm install vmware-esx-drivers-Driver_offline_bundle-000000.x86_64.rpm

Remember both ESX and ESXi can driver can be updated from VSphare Client Update Manager.

going to "Update Manager" and click to Admin view, add the drivers to the "Patch Repository"

Scan the host and Remediate it.

Reboot the server.