A Cisco NSO service has just been deployed. Which Cisco NSO CLI command is used to inspect the resulting device configuration changes before the changes are pushed to the network?

The commit dry-run command in the Cisco NSO CLI is used to simulate the commit process. It calculates the delta between the current running configuration and the new configuration in the transaction, and then determines the specific commands that would be sent to the network devices to enact these changes. The outformat native option formats this output into the device's native command-line syntax (e.g., Cisco IOS-XE or Junos commands). This allows an operator to inspect the exact configuration changes that will be pushed to each device before actually applying them, fulfilling the requirement of the question.

A. show service impact: This is not a valid Cisco NSO command. While you can view service data, this specific syntax does not exist for previewing device configuration changes.
C. pseudo-commit: This is not a valid Cisco NSO command. The correct term for simulating a commit without applying changes is dry-run.
D. show dry-run output: This is not a valid Cisco NSO command. The dry-run functionality is an option appended to the commit command, not a standalone show command. ---

1. Cisco NSO Administration Guide, 6.0: In the "The Commit Command" chapter, the dry-run option is detailed. It states, "The dry-run option is used to see what NSO would send to the devices without actually sending it." The guide further explains the outformat option, specifying that native "displays the configuration in the native format of the device."

Reference: Cisco NSO 6.0 Administration Guide, Chapter: The Commit Command, Section: The dry-run Option.

2. Cisco NSO CLI Command Reference, 6.0: The reference guide for the NSO CLI explicitly documents the commit command and its parameters. It lists dry-run as a primary option and outformat as a sub-option for dry-run.

Reference: Cisco NSO 6.0 CLI Command Reference, Chapter: Configuration Mode Commands, Section: commit.

3. Cisco DevNet NSO Basics Learning Lab: The "Committing changes to the network" module demonstrates the use of commit dry-run. The lab instructions state: "To see what NSO would send to the devices without actually sending anything, use the commit dry-run command... To see the native device commands that would be sent, add the outformat native option."

Reference: Cisco DevNet Learning Labs, NSO Basics, Module: Committing changes to the network, Step 2: Dry Run.