Question

Your team is upgrading IOS-XE software on a distribution switch and wants to validate that OSPF neighbor relationships are identical before and after the maintenance window. Using only pyATS CLI tools (no custom test scripts), which approach captures a pre-change baseline and then automatically reports any differences after the change?

Accepted Answer

Run 'pyats learn ospf --testbed-file tb.yaml --output pre' before the change and 'pyats learn ospf --testbed-file tb.yaml --output post' after, then run 'pyats diff pre post' to compare the structured snapshots

Answer

Run 'pyats parse "show ip ospf neighbor" --testbed-file tb.yaml' twice and manually eyeball the two JSON outputs for changes

Answer

Run 'pyats verify ospf --testbed-file tb.yaml' once after the change, since verify inherently knows the previous neighbor state

Answer

Run 'pyats run job ospf_job.py' before and after the change and use 'pyats logs view' to compare the two HTML reports