Overview

This chapter details the mirror buffer drop packets feature, which captures and mirrors packets dropped by a router's Traffic Management (TM) buffer due to overflow, specifically exact or statistical metering. It enables analysis of these dropped packets, offering benefits like data preservation, control plane stability, and failover assurance.

Mirror buffer drop packets

This section explains the mirroring buffer drop packets feature, which captures and analyzes packets discarded due to router buffer overflows or congestion.

Guidelines for mirroring buffer drop packets

This section explains the operational guidelines and constraints for mirroring buffer drop packets, including interface support, session limits, and specific drop reasons. These rules ensure proper configuration of SPAN to file and ERSPAN sessions for traffic monitoring.

Configure buffer drop packets mirroring for SPAN to file

Use this procedure to configure a global monitor session that mirrors buffer drop packets directly to a file destination.

Configure buffer drop packets mirroring for ERSPAN

Use this procedure to configure a global session for mirroring buffer drop packets to an ERSPAN destination.