For SLE 15 run the following as root:
zypper addrepo https://download.opensuse.org/repositories/Cloud:OpenStack:Pike:cisco-apic/SLE_15/Cloud:OpenStack:Pike:cisco-apic.repo
zypper refresh
zypper install libnl-config
For SLE 12 SP4 run the following as root:
zypper addrepo https://download.opensuse.org/repositories/Cloud:OpenStack:Pike:cisco-apic/SLE_12_SP4/Cloud:OpenStack:Pike:cisco-apic.repo
zypper refresh
zypper install libnl-config
For SLE 12 SP3 run the following as root:
zypper addrepo https://download.opensuse.org/repositories/Cloud:OpenStack:Pike:cisco-apic/SLE_12_SP3/Cloud:OpenStack:Pike:cisco-apic.repo
zypper refresh
zypper install libnl-config