Cisco ASR1004-20G/K9 Aggregation Services Router

The Cisco ASR1004-20G/K9 Aggregation Services Router delivers up to 20 Gbps system throughput within the Cisco ASR 1000 Series, backed by the ASR1000-ESP20 embedded services processor for high‑performance routing and embedded services. Deployed in enterprise WAN edge and service provider aggregation networks, it features four SPA slots for expansion, 8 GB DRAM (expandable depending on configuration), and dual AC power supplies with redundancy to support reliable, scalable traffic handling. Management is provided via a console port, auxiliary port, and management Ethernet port, while routing protocols such as BGP, OSPF, EIGRP, and IS-IS enable scalable WAN connectivity. Common replacements for legacy edge platforms include Cisco ASR1002-X, ASR1006, and ASR1001-X.