I'm in the process of installing ECE on my first host.
I've seen a number of similar topics with the issue of the kernel version being incorrect.
The documentation very clearly states that kernel-lt 4.4.155 from elrepo is the preferred option (at least for RHEL).
However, the elrepo project has cycled kernel-lt 4.4.155 out of it's archive and is no longer generally available.
It's many mirrors are also missing this version of the kernel-lt rpm.
Are there any other distributions points or yum repositories that still host this version of kernel-lt available?