Some days ago I had to configure a radius server on an APIC cluster. This server was addressed in the 172.17.0.0/16 range and it worked well for the spines and leaves of the fabric but not for any APIC of the cluster. From the APIC, we had the "unreachable" faults: From the CLI, the problem seemed more clear: APIC1# bashadmin@APIC1:~> ping 172.17.1.50PING 172.17.1.50 (172.17.1.50) 56(84) bytes of data.From 172.17.0.1 icmp_seq=1 Destination Host UnreachableFrom 172.17.0.1 icmp_seq=2 Destination Read more [...]