What limitation exists when using RADIUS-assigned pools?

When using RADIUS-assigned pools, there is a critical limitation that stems from the requirement for a one-to-one relationship between a user and an IP address. This means that each user must have a unique IP address assigned to them when they authenticate via RADIUS. If multiple users were allowed to share the same IP address, it could lead to confusion in network routing and address management, and it could undermine security protocols that expect distinct connections for each user.

This one-to-one relationship ensures that if a user is disconnected or logged out, their assigned IP address can be reused for another user only after it has been released completely, maintaining clarity and order in network resource allocation. This approach prevents challenges related to tracking user sessions and managing IP address availability effectively, which are vital for maintaining secure and efficient network access.