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Is It Possible to SPAN to the Switch CPU?

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Issue

I would like to capture/display packets from the switch data plane via tcpdump from the switch control plane.

Environment

  • Cumulus Linux, 2.5.x

Resolution

SPAN to the CPU is not possible. SPAN should be used from one switch port to another, with tcpdump run from a connected host. For more information refer to the following:

 

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Cumulus Networks is now part of the NVIDIA Networking Business Unit! The NVIDIA Cumulus Global Support Services (GSS) team has merged its operations with the NVIDIA Mellanox support services team.

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