This is a known issue VMware KB: Upgrading a host using HP Custom Image VMware ESXi 5.5 Update 1 fails with conflicting vib error for broa…
Currently there is no resolution for this, but the KB offers the following workarounds:
- Contact HP support and request an updated HP Custom Image for ESXi 5.5 Update 1.
- Upgrade the host using the HP 5.5 Update 1 March 2014 image and then apply latest patches.
- Build a custom ISO with HP 5.5 Update 1 June 2014. Remove the Broadcom NX2 packages and replace with the older version from the HP 5.5 GA build available here. Use this modified image to upgrade the hosts.