.. index: SNMP
.. _snmp_4_1:

SNMP modifications in version 4.1
=================================

In version 4.1, some changes have been made regarding SNMP.

Activate SNMP
^^^^^^^^^^^^^
By default, the **SNMP stack** is no longer automatically started on
|Product| probes. To activate it, use the Graphical User Interface:

 * Configuration > Settings > Nodes Management

   .. gofigure:: ../img/gui_set_snmp-shadow.png

      SNMP Configuration by GUI.

 * Set **SNMP Enabled** to **Yes** and apply configuration

You'll then be able to request system linux SNMP or |Product| OIDs.
Contrary to pre-4.1 versions, the entire SNMP stack is started when enabled.

.. note::

   **When migrating** from prior versions **with SNMP activated**,
   the setting will be kept. In others words, **you won't have to start it again**.


The |Compagny|  MIB
^^^^^^^^^^^^^^^^^^^

The |Compagny| MIB part has been updated:
 * You'll find the **new MIB definitions** available
   :download:`here <../snmp/PERFORMANCEVISION-MIB.txt>`
 * Overall, the **MIB** has been **cleaned** of useless items, and the
   **Business Critical Network** / **Application** parts have been
   **fixed and updated**.
 * Note that **obsoleted fields** have been **kept** for compatibility
   reasons.

BCA/BCN SNMP requesting
^^^^^^^^^^^^^^^^^^^^^^^

From this release onwards, BCA and BCN requests should be adapted as
described below:

The **result** you get when requesting SNMP BCA/BCN is for the
**actual time - 10 min**.

.. container:: example

  Example:
   SNMP request made at Aug 10 11:**31**:09 (**1470821469** EPOCH format)

   Request result sample:
    * BCA name = YourCriticalApp
    * BCA data = EURT
    * BCA TS = **1470820869** -> Aug 10 11:**21**:09

In other words, the BCA/BCN results you get are always 10 minutes old.

.. note::

   You'll find these informations described in the
   :download:`MIB <../snmp/PERFORMANCEVISION-MIB.txt>` itself;
   take a look at the `bcaStateTable` and `bcnStateTable` tables
   for more details.

|Compagny| Nagios Plugin
^^^^^^^^^^^^^^^^^^^^^^^^

The **script** has been **entirely rewritten** in Python for easier integration.
It also outputs the *metrics* in a format compatible with Nagios®'
*Performance Data*. This let's you easily graph the different BCA/BCN *metrics*.

The script can be found :download:`here <../snmp/nagios.py>`. You'll also need
to install the |Compagny| :download:`MIBS <../snmp/PERFORMANCEVISION-MIB.txt>`
and snmp tools.