I was trying to run GNS3 2.2.29 in vmware esxi 5.5.0
First I get a invalid SHA256.
I download ovftool and converted ova (SHA256) to ova (SHA1) using the command
ovftool.exe –shaAlgorithm=SHA1 ” $PATH \GNS3 VM.ova” ” $PATH \GNS3 VM_sha1.ova”
After that I get a unsupported hardware vmx-11, so to edit hardware support I needed to convert it to vmx
ovftool.exe “$PATH\GNS3 VM.ova” ” $PATH \GNS3 VM.vmx”
edit virtualhw.version from 11 to 10 in generated file .vmx
then generate back ova with sha1
ovftool.exe –shaAlgorithm=SHA1 ” $PATH \GNS3 VM.vmx” ” $PATH \GNS3 VM_sha1.ova”