What is BRAS?

A Broadband Remote Access Server (BRAS), also known as a Broadband Network Gateway (BNG), is a network device in a service provider's network that aggregates user sessions from multiple access networks (e.g., DSL, fiber) and routes them to the core network. It provides functions such as IP address assignment, quality of service (QoS) enforcement, policy management, and security for broadband subscribers. In essence, it acts as a central aggregation and management point for all broadband traffic entering and exiting the service provider's network.