Implementation Planning Flashcards

What is the primary purpose of a network implementation plan for a Junos deployment?

Answer: To document the configuration steps, rollback procedures, and testing criteria before making changes to production

An implementation plan defines the sequence of configuration changes, pre/post-change verification steps, rollback procedures, and success criteria to reduce risk during network changes.

In Junos, what is the maximum number of rollback configurations stored by default?

Answer: 50

Junos stores up to 50 rollback configuration files (rollback 0 through rollback 49), with rollback 0 being the current active configuration and rollback 1 being the previous.

What does 'load override' do in Junos configuration mode?

Answer: Replaces the entire candidate configuration with the contents of a specified file

'load override' completely replaces the candidate configuration with the file's contents, discarding any existing candidate configuration. It is used to deploy a complete configuration from a file.

How should VLAN IDs be planned when deploying Juniper EX switches in a multi-switch environment?

Answer: Assign unique VLAN IDs consistently across all switches and trunk ports to ensure traffic segmentation and correct tagging

VLAN IDs must be consistently planned across the network because 802.1Q VLAN tags are significant end-to-end on trunk ports. Inconsistent VLAN IDs cause traffic misclassification.

What is the purpose of 'commit check' in Junos?

Answer: Validates the candidate configuration for syntax and semantic errors without activating it

'commit check' runs Junos's configuration validation engine against the candidate configuration, reporting any errors or warnings, without making any changes to the active configuration.

During a Junos upgrade, what is the recommended step before upgrading production devices?

Answer: Test the new software version in a lab environment that mirrors production and review the Junos release notes for known issues

Testing upgrades in a lab environment and reviewing release notes (for known caveats, changed behaviors, and upgrade paths) minimizes the risk of production issues during a Junos software upgrade.