Traffic Mirroring Configuration Guide for Cisco 8000 Series Routers, Cisco IOS XR Release

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Restrictions for traffic mirroring

Updated: March 2, 2026

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Overview

Adhere to these restrictions when configuring traffic mirroring to ensure your setup aligns with supported interface types and monitoring capabilities.

These restrictions apply to traffic mirroring:

  • The router does not support traffic mirroring counters per interface.

  • The router does not support bundle member interfaces as sources for mirroring sessions.

  • The router does not support port-level mirroring for any type of SPAN.

  • ERSPAN tunnel statistics is not supported.

  • The dropped packets at NPU cannot be captured by regular ERSPAN session. For capturing dropped packets at NPU, use the mirror forward-drop packet feature.

  • From Release 24.3.1, layer 2 SPAN features are supported on PWHE. For more information about the layer 2 SPAN features supported on PWHE, see the Traffic Mirroring on PWHE section in the L2VPN Configuration Guide for Cisco 8000 Series Routers.