Question

Your team runs a pyATS job after every automated BGP configuration push to validate that all neighbors return to the Established state. You want the validation to compare a freshly learned operational state against a previously saved snapshot taken before the change, and to fail the pipeline stage automatically if any neighbor differs. Which pyATS CLI approach best accomplishes this change validation?

Accepted Answer

Run 'pyats learn bgp --testbed-file tb.yaml --output before/' before the change and 'pyats learn bgp --testbed-file tb.yaml --output after/' after, then 'pyats diff before/ after/' and check the exit code in the pipeline

Answer

Run 'pyats validate testbed --testbed-file tb.yaml' after the change, which compares live device state to the testbed inventory and returns nonzero on any mismatch

Answer

Run 'pyats parse "show ip bgp summary"' twice and rely on the parser raising an exception whenever a neighbor is not Established

Answer

Run 'pyats run job snapshot_job.py' with the built-in Genie Conf model, which automatically reverts the device if the post-change state does not match the pre-change configuration