This applies the same cached-versus-priority tradeoff described for the base client's search type, but specifically to whichever servers are configured in this dedicated user-login table. That lets the admin set a different search behavior for CLI login authentication than whatever is configured for the box's other RADIUS uses. For example, setting this to 'priority' for user logins, always trying the primary login server first, while the general client table uses 'cached' elsewhere, reflects a deliberate choice to keep login attempts predictable even at the cost of extra latency during a primary outage.