Traffic Mirroring Configuration Guide for Cisco 8000 Series Routers, Cisco IOS XR Release
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Table of contents
Updated: March 2, 2026
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This section provides the limitations and restrictions that apply when mirroring forward-drop packets. Understanding these constraints, such as counter updates and packet mirroring limitations, ensures accurate network monitoring and troubleshooting.
These restrictions apply to mirroring forward-drop packets:
ERSPAN counters are not updated for forward-drop packets.
Not all packets that are dropped by NPU are mirrored.
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