Depending on your vSphere environment, you will have probably installed your ESXi hosts using a custom ISO from your hardware manufacturer.
Then after this, usually the standard vSphere Update Manager sources are used.
VUM will update your ESXi Host with patches from VMware, however it won’t update perform driver updates to your components e.g. NIC
This is where the vSphere Infrastructure Bundles come into play. A great explanation of VIBs can be found over here by Kyle Gleed
First of all browse to the HP Software Delivery Repository and locate the most recent month (this is a manual check I’m afraid). In this case it is Apr2013
Double click Apr2013 and then locate index.xml and double click on this. What you want is the URL from your browser, in this case it is
Go into vSphere Update Manager > Administration View > Configuration > Download Settings and Select Add Download Source
Add in http://vibsdepot.hp.com/hpq/apr2013/index.xml and Validate URL. If successful a Green Tick should appear.
The VIB won’t be live for use by VUM until you click Apply
Then click ‘Download Now’
We now need to make sure that our Baseline Groups are going to use the HP VIBs as a validation source for VUM Scans
To do this go to Baselines & Groups > Edit
Click Next until you get to Criteria and make sure that Patch Vendor equals Any
Click Next until you get through to Finish.
Hope that helps you manage and maintain your vSphere environment.
Barrie Seed (@vStorage) bought to my attention via Twitter that Dell also have a VIB repository which can be linked to VUM.
The URL is http://vmwaredepot.dell.com/index.xml which validates correctly.