What is the maximum number of configurations, by default, that can be recovered using the rollback command in Junos?

The maximum number of configurations that can be recovered using the rollback command in Junos is indeed 50. This command allows you to revert to a previous configuration by referencing the saved snapshots of the configuration that the system maintains.

By default, Junos keeps a history of the last 50 configuration changes. This functionality is essential for maintaining the integrity and stability of the network, as it enables administrators to return to a stable configuration if a recent change introduces issues or does not meet expectations. The ability to roll back to prior configurations can significantly expedite troubleshooting and recovery processes.

Understanding this limit is crucial for network administrators to manage configuration changes effectively and ensure that they have the ability to revert to stable states when necessary. In scenarios where configurations are changed frequently, being aware of this maximum threshold helps in planning and managing configuration history appropriately.