Overview
Outlines BGP mechanisms for maintaining routing stability and availability during maintenance and failures, including feedback mechanisms, extended route retention, nonstop routing, fast fallover options, persistence enhancements, flexible persistence, and best practices for graceful BGP operations.
This chapter provides a comprehensive guide to BGP graceful maintenance and failover features. It covers mechanisms like BGP-RIB feedback, extended route retention, nonstop routing, and fast fallover to ensure network stability and minimize traffic loss during various events. Additionally, it details BGP persistence (LLGR) and graceful maintenance for controlled traffic shifts during planned outages and failures.
BGP extended route retention
Details the concept of extended route retention in BGP, discusses LLGR restrictions, and provides steps for configuring and applying route policies to BGP neighbors.
BGP nonstop routing with stateful switchovers
Describes BGP nonstop routing with stateful switchovers, including the configuration of NSR process-failures, operational flows of active and standby route processors during failures, feature behavior, and procedures to enable or disable BGP NSR.
BGP fast external fallover
Introduces BGP Fast External Fallover for rapid detection of eBGP neighbor failures, recommends increasing packet rates for large deployments, and guides configuration of eBGP session packet rate.
BGP fast fallover
Details BGP Fast Fallover mechanisms for route protection, presents recommendations for stable and predictable operation, and provides steps to configure BGP fast-fallover.
BGP persistence
Explains BGP persistence and its role in network resiliency, outlines operational flows, delivers recommendations for enhancing stability, and provides instructions to configure BGP persistence.
Flexible BGP persistence
Outlines flexible BGP persistence benefits, describes configuration of LLGR advertisement and activation for iBGP peers with default and peer-time settings, and presents enabling strategies for LLGR capabilities.
BGP graceful maintenance
Guides BGP graceful maintenance practices by addressing restrictions, operational principles, key recommendations, and best practices, and supplies procedures for activation, route preference adjustments, GSHUT policy configuration, verification, and managing CLUSTER_LIST attributes with associated workflows.