What is ASR routers?

ASR routers, specifically Cisco's Aggregation Services Routers (ASR), are network devices designed for high-performance routing and aggregation of network traffic, typically used at the edge of a service provider network or in large enterprise networks. They provide a wide range of features, including high port density, advanced quality of service (QoS), security features, and support for various network protocols. They are commonly used to aggregate traffic from multiple sources, such as customer access networks, and route it towards the core network.