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History and compare

Step back to an earlier state of the network and see exactly what changed.

Every poll builds a new picture of the network. When something structural changes (a device, a link, a wired endpoint or an issue appears or goes away), Lantern keeps a snapshot. Live values such as traffic and PoE draw do not create snapshots, so the history stays small.

On the map, choose History.

History mode — Viewing a snapshot: the timeline at the bottom, what changed on the right, and changes marked on the map.

The map shows the network as it was, with a hatched background, a HISTORY badge and a banner saying which snapshot you are viewing and what it is compared with.
The timeline at the bottom moves between change points; Compare with picks the earlier snapshot to compare against.
What changed on the right lists added, removed or resolved, and changed devices, links, issues and endpoints. Changes are marked on the map too.
Back to live returns to the current network.

The Changes page lists the same snapshots.