Question

A network automation engineer must add change validation to a CI pipeline for IOS-XE routers. After each deployment, the pipeline should confirm that all BGP neighbors return to the Established state and that no interfaces flapped, using pyATS from the command line without writing custom Python test scripts. Which pyATS CLI approach best satisfies this requirement?

Accepted Answer

Capture a `pyats learn bgp interface --testbed-file tb.yaml --output pre/` snapshot before the change and a second snapshot after, then run `pyats diff pre/ post/` to detect operational-state differences

Answer

Run `pyats validate testbed --testbed-file tb.yaml` after the change to assert BGP neighbors are Established

Answer

Execute `pyats run job` with a Genie clean YAML to recover any device whose BGP session is down

Answer

Use `pyats parse 'show ip bgp summary'` once after the change and grep the raw text output for the word 'Established'