WEBVTT

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This prepared lab has three SCALANCE switches in a ring and two routers for traffic checks.

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Open the first switch's Web UI to inspect its settings.

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Confirm the model and software version on the Versions page.

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Set a descriptive system name and apply it with Set Values.

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Inspect Ports to see which physical links are up.

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LLDP identifies the neighbouring switches and the ports that connect them.

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Choose manager mode and the two connected ring ports, then apply the settings.

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A closed ring blocks one manager port to prevent a loop.

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The terminal reports the same ring status and blocked port.

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First, confirm that the two endpoint routers can reach each other.

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Shut down one ring port on a different switch to simulate a link failure.

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The port row and its LED now reflect the shutdown.

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The manager reports an open ring and releases the blocked port.

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Traffic still reaches the far router through the remaining path.

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Restore the same port to close the ring again.

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The manager restores its loop-prevention block, and the endpoint test still succeeds.

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Save All Configs stores the running configuration for every device in this lab.

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Review the saved startup configuration, including the system name, ring mode and ports.

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Reopen the lab from My Labs and confirm that the saved ring settings are retained.

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These checks show simulated recovery; they do not measure packet loss during the transition.