Description of problem:
Mac pool ranges in configure -> mac pools -> edit mac pool are off by one.
Version-Release number of selected component (if applicable):
MACs Count is now correct.
Verified on - 188.8.131.52-0.1.el7_3
See also BZ 1219384 which was the origin request(how many available MACs in the cluster).
This bugzilla is included in oVirt 4.2.4 release, published on June 26th 2018.
Since the problem described in this bug report should be
resolved in oVirt 4.2.4 release, it has been closed with a resolution of CURRENT RELEASE.
If the solution does not work for you, please open a new bug report.