Please update python-pyghmi to correctly support virtual BMCs listening on IPv4 addresses. See this commit: https://github.com/openstack/pyghmi/commit/8322cf4628ce4fa8fe9b23a5326855091f860ed6
OSP11 is now retired, see details at https://access.redhat.com/errata/product/191/ver=11/rhel---7/x86_64/RHBA-2018:1828