Provides system behavior and operational guidance for removing or re-adding many Border Gateway Protocol (BGP) virtual routing and forwarding (VRF) instances.
Removing or re-adding many BGP VRFs at one time can cause sustained high BGP CPU utilization. The duration and severity depend on the number of VRFs, neighbors, prefixes, and paths.
During processing, BGP show commands can respond slowly or temporarily stop responding.
Operational guidance
Use these guidelines when you remove or re-add many BGP VRFs:
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Remove or re-add VRFs in small batches.
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Wait for BGP to finish processing each batch.
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Confirm that CPU utilization and BGP command response times are stable before you start the next batch.
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Select the batch size and recovery time based on the deployment scale and system load.