Execute " ACI_CRC_Poller.py" to collect CRC+FCS errors in domain.  
    
Inputs:
    1. ACI Domain IP /FQDN, Username and password
    2. Path to the folder where you want to save files  
            VALID folder format:  
            EXAMPLE:  
                Windows-> C:\Users\Admin\Desktop\ACI\   
                MAC -> /Users/admin/Desktop/ACI/  
**PLEASE NOTE that data collection and script execution might get impacted if folder format is not as above. Also make sure that folder where you want to save files already exists**  
        
    3. Duration for which you want to run the script:  
            Maximum allowed duration is upto seven days 
            Minimum valid duration is 5minutes. Even if user enters duration lesser than 5-minutes, script will run for 5-minutes and collect data in two files at the interval of 5-minutes.  
**Script collects FCS+CRC error every five minutes and saves data to files at the path specified in earlier input. It will collect data for the duration given in this input**  

"ACI_CRC_Parser.py" will analyse the data and give you tabular output with interfaces having error.  
Interfaces which are source of the error are highlighted in yellow colour.  
Script-2 execution can be started once we have at-least two files to compare data.
i.e. script-2 execution can be started atleast after 10 minutes of script-1 execution.  
  
Inputs:  
    1. ACI Domain IP /FQDN, Username and password
    2. Path where files are stored as a part of script-1 execution

** If you have data only for one day, then it will automatically process the data and start generating tabular output.  
Otherwise, it will display the date range for which you have CRC+FCS data collected and ask you input as below**  
    
    3. Enter Start date and end date
      
**AT THIS STAGE SCRIPT WILL GIVE YOU INITIAL TABULAR OUTPUT WITH INTERFACES HAVING NON_ZERO CRC+FCS DIFFERENCE.  
TABLE WILL BE SORTED IN DESCENDING ORDER OF FCS DIFFERENCE.  
ALSO IT WILL DISPLAY LLDP /CDP NEIGHBOUR INTERFACE.  
LAST COLUMN WILL UPDATE ERROR TYPE AS  
    LOCAL: INTERFACES WHICH ARE SOURCE OF ERROR.  
    STOMP: INTERFACES WHICH ARE JUST FORWARDING STOMPED PACKETS.  
    HISTORIC: INTERFACES WHERE ERRORS ARE HISTORIC AND ARE NOT OF CONCERN.  
      
  
** After displaying initial calculations, it gives further data sorting options, as well more granular output options. 
  
 By default, data is sorted in descending order of FCS Difference.  
 Further table sorting options are by CRC_Difference, Initial_CRC or Initial_FCS value.  
    4. Enter relevant input for data sorting or granular data execution
        
In case of more granular output, script will ask for:
        4a. Interface for which you want more granular data  
        4b. Date for which you want granular data to be displayed  
**Granular output will display absolute CRC and FCS values at various time interval for all the time-stamps when data was collected on that particular day**