Examine blocks function for a network device.
NCIS needs an examine blocks function that will gather all configured blocks for a given network device.
This function will need to loop over all configured VLANs. Hence, a function to find all VLANs on a device
is also needed.
- an FBI audit robot can run periodically to verify the state of all blocks/unblocks in FBI are consistent
with the network state.
- an NCIS GUI page can be developed to show the details for a given network device.