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Spirent TestCenter: Error when deploying LabServer 4.91 with the .ova file downloaded from CSC on vSphere 6.0

Objective/Summary
Some customers have reported an error when trying to deploy virtual lab server OVA file 4.91, downloaded from CSC, using vSphere 6.0 getting the following error:
 

“The OVF package is invalid and cannot be deployed.

The following manifest file entry (line 1) is invalid: SHA256 (xxxxxxx.ovf).”






The .ova downloading from the CSC looks as showed on the following image:

 

Downloaded file: Spirent_TestCenter_LabServer-4.91.5436.ova

Environment/Versions
  • Spirent TestCenter
    • LabServer 4.91
    • VSphere 6.0
  • You will also need to install the following (or the like) on your machine (assuming a Windows based machine)
    • OVFTool 4.2 (64-bit)

 
Procedure




Cause

According to the VMware Knowledge Base, this issue occurs because the vSphere Client does not support the SHA256 hashing algorithm. Source: https://kb.vmware.com/s/article/2151537



Resolution
 

To resolve this issue, you must convert the OVA from the Cryptographic Hash Algorithm SHA256 to SHA1.

To do this, you can use OVFTool and run this command:
 

ovftool.exe --shaAlgorithm=SHA1 /path/to/the/original/ova_file.ova /path/to/the/new/ova/file-SHA1.ova


Example:


 

You can now use the new ova generated with SHA1 for your future deployments without experiencing any format error.

Product : LabServer