This check connects to all devices defined in the testbed, and parses are interface counters if an interface has CRC errors, the test case fails.
# run with the provided devnet always-on sandbox
pyats run job job.py --testbed-file ../default_testbed.yaml
# run with the provided mock devices (does not require real testbed)
pyats run job job.py --testbed-file ../default_testbed.yaml --replay mock