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.
Benefits of mirroring buffer drop packets
These are the benefits of mirroring buffer drop packets:
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Data Preservation: During process restarts, while new packet logging is paused, all previously collected data remains intact, ensuring no critical diagnostic information is lost.
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Control Plane Stability: The operation of this feature remains unaffected by restarts of any control plane process, allowing for uninterrupted traffic analysis.
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Failover Assurance: For interfaces not located on the Route Processor (RP), this feature ensures a seamless failover experience. Traffic mirroring and packet capture proceed without disruption, even amidst hardware changes or network reconfigurations, safeguarding continuous network analysis.