MACSec Configuration for ASR 9000 Series Routers

This guide details the configuration of Media Access Control Security (MACSec) encryption on the ASR 9000 Series Aggregation Services Routers. MACSec is an IEEE 802.1AE standard designed for encrypting packets between MACSec-capable routers at Layer 2. The document outlines the feature history, including various releases that introduced and modified MACSec capabilities, such as support for VLAN sub-interfaces and MACsec as a service. It explains the MACsec authentication process, which utilizes the MACsec Key Agreement protocol (MKA) for session key exchange and encryption key management. The guide also describes the advantages of MACSec, including data integrity checks, replay protection, and support for clear traffic. Furthermore, it details the hardware support for MACSec on different Cisco ASR routers and modular port adapters, specifying the compatibility of various chassis and line cards. The document serves as a comprehensive resource for configuring and verifying MACSec encryption effectively.