Networking
BGP Communities and Route Filtering on Cisco IOS-XE: A Practical Guide
BGP communities let you tag routes with policy metadata and use that tagging for filtering, traffic engineering, and DDoS mitigation. This guide covers standard, extended, and large communities on Cisco IOS-XE with real CLI examples — from basic send-community config to RTBH blackholing and inbound route tagging by peer type.