yum update Protected multilib versions
During a recent yum update, it failed with multiple lines of
Error: Protected multilib versions:
iptables-1.4.21-24.el7.i686 != iptables-1.4.21-23.el7.x86_64
( more error lines like above )
....
From above, what the above error means is that for that specific package, version “X” of an RPM is installed for architecture x86_64 while yum was also instructed to install version “Y” of that same rpm for architecture i686.
Rather than resolving each depedency manually, I enabled the Workstation Optional RPMs repo to locate the missing rpms and the problem was resolved:
sudo subscription-manager repos --enable=rhel-7-workstation-optional-rpms
sudo yum clean-all
sudo rm -rf /var/cache/clean
sudo yum update