cerial.py

Script use

Parse a Cisco serial number into an approximate manufacture date.
Works only with 11 character cisco serial numbers.
The script needs 2 arguments to run:
- 1st argument: cerial.py
- 2nd argument: SERIALNUMBER
Valid command looks like: ./cerial.py SAD08300D4W

Script input

Cisco serial number (S/N)

Script output

Approximate manufacture date

2nd argument ('Serial Number')

Cisco doc

Manufacturing Year Codes

Cisco Code	Manufacturing Year
01	1997
02	1998
03	1999
04	2000
05	2001
06	2002
07	2003
08	2004
09	2005
10	2006
11	2007
12	2008
13	2009
14	2010
15	2011
16	2012
17	2013
18	2014
19	2015
20	2016
21	2017
22	2018
etc.	etc.

Manufacturing Week Codes

Cisco Code	Calendar Month
01-05	January
06-09	February
10-14	March
15-18	April
19-22	May
23-27	June
28-31	July
32-35	August
36-40	September
41-44	October
45-48	November
49-52	December

The serial number will be in the format: 'LLLYYWWSSSS'

'YY' is the year of manufacture
'WW' is the week of manufacture.

Example S/N: 'SAD08300D4W'

'YY' = 08 (year code)
'WW' = 30 (week code)

1st argument (cerial.py)

This is the script that we will run.

Legal examples:

python2 <1st_argument> <2nd_argument>
python3 <1st_argument> <2nd_argument>

Let's use the following example to explain the script:

python3 cerial.py SAD08300D4W

The script will:

Count the characters from the Serial Number we specified (SAD08300D4W)
- If not equal to 11 characters we get an error and the script stops.
- If 11 characters, continue.
Parse the year code.
Parse the week code.
Create Cisco's manufacturing years list (from year 1996 up to 2100).
Create a dictionary that maps Cisco's year codes to Cisco's manufacturing years.
Create a dictionary that maps Cisco's week codes to calendar Months.
Print the Serial Number that was specified (SAD08300D4W).
If parsed year code in dictionary, put it into variable "year".
If parsed year code not in dictionary, print error ">> Error: Could not match year code!" and put nothing into variable "year".
- Note: Here there is no way i can't match because i have all values from 00 up to 99 in the dictionary but i like to have it here for understanding purposes.
If parsed week code in dictionary, put it into variable "week".
If parsed week code not in dictionary, print error ">> Error: Could not match week code!" and put nothing into variable "week".
Finally the script will print ">> Approximate manufacture date: week year".

Successful demo

aleks@acorp:~/cerial$ python3 cerial.py SAD08300D4W

>> Serial Number: SAD08300D4W
>> Approximate manufacture date: July 2004

Unsuccessful demo (S/N not equal to 11 chars)

aleks@acorp:~/cerial$ python3 cerial.py SAD08300D4

>> Error: Serial Number must be 11 characters. 
          The Serial Number SAD08300D4 you specified is 10 characters.

aleks@acorp:~/cerial$ python3 cerial.py SAD08300D4W1

>> Error: Serial Number must be 11 characters. 
          The Serial Number SAD08300D4W1 you specified is 12 characters.

Unsuccessful demo (bad week code)

aleks@acorp:~/cerial$ python3 cerial.py SAD08000D4W

>> Serial Number: SAD08000D4W
>> Error: Could not match week code!
>> Approximate manufacture date:  2004

pynetscript/cerial