What is the name of the feature that allows the destination of a monitor session to be the CPU?

In Arista's Extensible Operating System (EOS), the feature that allows mirrored traffic from a source port or VLAN to be sent directly to the switch's control plane processor is called CPU Mirroring. This is configured using the monitor session destination cpu command. This capability is essential for troubleshooting control plane protocols or performing packet analysis directly on the switch using tools like tcpdump, especially when an external network analyzer is not available. The CPU processes these packets, allowing for direct inspection and diagnostics on the device itself.

A. Mirroring: This is the general technology name (equivalent to SPAN), not the specific feature of directing traffic to the CPU as a destination.

B. Advanced Mirroring: This is not an official Arista term for this specific function. It is a generic and non-descriptive phrase.

D. Super-Mirror: This is not a recognized feature name within Arista EOS. It is a fabricated or non-standard term.

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1. Arista Networks EOS 4.28.1F Configuration Guide: In the "Monitoring Features" chapter, the "Port Mirroring" section details the configuration options. The subsection "Mirroring to the CPU" explicitly describes this feature. It states, "The destination of a monitor session can be the CPU. This is useful for troubleshooting control plane protocols or when an external analyzer is not available." (See Chapter: Monitoring Features > Port Mirroring > Mirroring to the CPU).

2. Arista Networks EOS 4.28.1F Command Reference: The monitor session destination command description includes cpu as a valid parameter. The documentation for this command explains its use for directing mirrored packets to the switch's CPU for analysis. (See Chapter: Monitor Commands > monitor session destination).