BGP Configuration Guide for Cisco 8000 Series Routers, Cisco IOS XR Releases

BGP Dynamic Neighbors and Resource Management

Updated: February 28, 2026

Overview

Explains how to configure, manage, and monitor BGP dynamic neighbors and resource allocation, including dynamic peering, multi-instance BGP, neighbor resets, cache clearing, capability suppression, and system statistics.

You will learn how to configure, monitor, and manage BGP dynamic neighbors and resource allocation, including advanced tasks such as dynamic peering, multi-instance BGP configuration, neighbor resets, and resource management for streamlined network operations.

BGP dynamic neighbors

Describes dynamic neighbor configuration that allows peering with multiple remote neighbors using an IP address range, reducing manual configuration and supporting both IPv4 and IPv6.

Multi-instance and multi-AS BGP

Describes a configuration approach that uses unique AS numbers per BGP instance, isolates address families, and enables scaling by distributing peer sessions and tables.

BGP neighbor resets

Explains administrative processes to refresh or clear BGP sessions using soft or hard resets to apply configuration changes and maintain routing accuracy.

Clear BGP caches, tables, and databases

Describes removing all entries from specified BGP data structures and resetting neighbor sessions for troubleshooting or data integrity.

Disable a BGP neighbor

Administratively shuts down a BGP neighbor session without removing its configuration for temporary maintenance or troubleshooting.

Neighbor capability suppressions

Describes disabling capability negotiation during BGP session establishment to ensure interoperability with legacy devices lacking capability support.

Display BGP system and network statistics

Displays BGP routing tables, neighbor information, and performance statistics to monitor operation and verify configuration.

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