Dev-ops rules the world with Cisco NX-OS !

Dev-ops are cool ! So you wanne be cool. Learn the following nice features with Open NX-OS for the Nexus 9000:

What can you do when you login with a dev-ops role on a Nexus 9000:

N9K-OpenNXOS# sh role name dev-ops

Role: dev-ops

  Description: Predefined system role for devops access. This role

  cannot be modified.


  Rule    Perm    Type        Scope               Entity                  


  6       permit  command                         conf t ; username *     

  5       permit  command                         attach module *         

  4       permit  command                         slot *                  

  3       permit  command                         bcm module *            

  2       permit  command                         run bash *              

  1       permit  command                         python * 

Lets enable the bash-shell and nxapi feature :

N9K-OpenNXOS# conf t

Enter configuration commands, one per line. End with CNTL/Z.

N9K-OpenNXOS(config)# feature bash-shell

N9K-OpenNXOS(config)# feature nxapi


First we’re gonne explore the bash environment :

N9K-OpenNXOS# run ?

  bash        Linux-bash

  guestshell  The guest shell Linux-bash

N9K-OpenNXOS# run bash

Now we’re in the bash shell and we can do all kind of things. Here are just a few simple examples:

bash-4.2$ whoami


bash-4.2$ pwd


bash-4.2$ cat /proc/version 

Linux version 3.4.10 (ssiddha@ins-sw-bld39) (gcc version 4.6.3 (Wind River Linux Sourcery CodeBench 4.6-60) ) #1 SMP Fri Apr 24 16:48:05 PDT 2015

But you can do more. Let’s go program something with python :

N9K-OpenNXOS# python

Python 2.7.5 (default, Oct  8 2013, 23:59:43)

[GCC 4.6.3] on linux2

Type “help”, “copyright”, “credits” or “license” for more information.

>>> print “Hello World!”

Hello World!


When you save your pythonscript at bootflash:scripts/ of the Nexus, you can run them with the source command. Ofcourse you can start always the pythonscripts with python <>

Pretty cool stuff huh… But we’re not finished !

There is a sandbox on the Nexus. Just go to http://<ip address>

dev-ops sandbox

You can type the command you would like. At the left bottom box you’ll see the format of JSON/XML to post to the Nexus and on the right box you see the outcome.

You don’t know how to program this in python ? Just click the button python :

Sandbox Python Script

More to come… When I finish my python course. 😉

More info at the OpenNXOS page of cisco :


One Response

Leave a Reply