Finally I found its bug in 6.7 u3
I have 6.7 u3 environment and 6.5 Enviorment( we have lenovo/dell/Hp)
When I run wsman connection from powerCLI its getting connected successfully for 6.5 environment irrespective of any hardware vendor
but when I run wsman connection against to 6.7 its always failing, I guess something is changed in 6.7.
