This exhibit highlights a critical operational requirement for Virtual Switching Extension (VSX) : Version Consistency .

Analyzing the Exhibit: * The Local Software Version is GL.10.09.0010.

The Peer (sw-agg2) Software Version is GL.10.11.1021.

The Config Sync Status explicitly reports: sw_image_version_mismatch_error.

The Impact of Software Mismatch: The VSX configuration synchronization engine ( vsx-sync ) requires that both the primary and secondary switches run the exact same version of AOS-CX. When a mismatch is detected, the synchronization of configuration (VLANs, LAGs, etc.) is immediately halted to prevent database corruption or unpredictable behavior.

Incompatible State: While the data plane (traffic forwarding) typically continues to function using the last known good configuration, the control plane " cluster " is effectively in an incompatible mode for management. You cannot make configuration changes on the Primary and expect them to push to the Secondary until the versions are aligned.

Evaluating Other Options:

Option A: Incorrect. The mismatch_error halts all config sync, regardless of whether the specific command exists in both versions.

Option C: A " Live Upgrade " (VSX Orchestration) requires both switches to have access to the same target image and for the sync engine to be healthy. You cannot live upgrade when the sync engine is already in an error state.

Option D: VSX is a distributed forwarding architecture. It does not " forward all traffic " to the primary. Traffic is balanced across MC-LAG links unless a physical failure occurs.