When multiple authentication or accounting servers are configured in the RADIUS server group, you can configure the algorithm for selecting the RADIUS servers. The algorithm of selecting the RADIUS server is classified into loading-balancing and primary/secondary.
Loading-balancing: The ME60 allocates the load based on the weights of the servers.
Primary/Secondary: The first configured server functions as the primary server, and the others act as the secondary servers.
The algorithm for selecting the RADIUS server could be configured.
By default, the algorithm for selecting the RADIUS server is primary/secondary.
So, we need to configure load-balancing algorithm by below commands to solve the problem:
radius-server group group-name
radius-server algorithm loading-share