Update nxos.rst

Author: dbarrosop

docs/support/nxos.rst

@@ -1,5 +1,10 @@
+NXOS
+----
+
 Notes on configuration replacement
-==================================
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+
 
 Config files aren't aren't normal config files but special "checkpoint" files.
 That's because on NXOS the only way to replace a config without reboot is to rollback to a checkpoint (which could be a file).
@@ -8,7 +13,7 @@ The ``!#`` part isn't necessary for the rollback to work, but leaving these line
 See the "Known gotchas" section below.
 
 Prerequisites
--------------
+_____________
 
 Your device must be running NXOS 6.1. The features ``nxapi`` server ``scp-server`` must be enabled.
 On the device and any checkpoint file you push, you must have the lines::
@@ -17,14 +22,14 @@ On the device and any checkpoint file you push, you must have the lines::
 
 
 Getting a base checkpoint file
-------------------------------
+______________________________
 
 An example of a checkpoint file can be seen in ``test/unit/nxos/new_good.conf``.
 You can get a checkpoint file representing your device's current config by running the ``get_checkpoint_file()``
 function in the ``napalm.nxos`` driver.
 
 Known gotchas
-------------------------------
+_____________
 
 - Leaving out a ``shutdown`` or ``no shutdown`` line will cause the switch to toggle the up/down state of an interface, depending on it's current state. 
 
@@ -39,19 +44,19 @@ Known gotchas
       vlan 30
 
 Diffs
----------
+_____
 
 Diffs for config replacement are a list of commands that would be needed to take the device from it's current state
 to the desired config state. See ``test/unit/nxos/new_good.diff`` as an example.
 
 Notes on configuration merging
-==============================
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
 
 Merges are currently implemented by simply applying the the merge config line by line.
 This doesn't use the checkpoint/rollback functionality.
 As a result, merges are **not atomic**.
 
 Diffs
--------
+_____
 
 Diffs for merges are simply the lines in the merge candidate config.