Create a file named /etc/yum.repos.d/dsu.repo

[dsu]
# to install execute “yum -y install srvadmin-all”
name=DSU 9 – $basearch
baseurl=http://linux.dell.com/repo/hardware/dsu/os_dependent/RHEL8_64
#failovermethod=priority
enabled=1
gpgcheck=0

yum -y install epel-release
yum -y install srvadmin-all

Adjust the zone as needed depending on how your network is configured

firewall-cmd --zone=internal --add-port=1311/tcp

firewall-cmd --reload