Grandstream GWN76XX SNMP Guide

Introduction

SNMP (Simple Network Management Protocol) is an Internet-standard protocol for managing devices on IP networks. It is used mostly in network management systems to monitor IP network devices for conditions that warrant administrative attention. SNMP exposes management data in the form of variables on the managed systems, which describe the system configuration. These variables can then be queried (and sometimes set) by managing applications. The variables accessible via SNMP are organized in hierarchies, which are described by Management Information Bases (MIBs).

Three significant versions of SNMP have been developed and deployed. SNMPv1 is the original version of the protocol. More recent versions, SNMPv2c and SNMPv3, feature improvements in performance, flexibility, and security.

This guide will cover the configuration steps to enable and test the SNMP feature on GWN76xx Wi-Fi access points.

Supported Models

The following Grandstream GWN76XX Wi-Fi Access Point models support SNMP:

Supported SNMP Versions

All supported GWN76XX models are compatible with SNMPv1, SNMPv2c, and SNMPv3.

Supported SNMP Messages

The GWN76XX access points support various SNMP message types.

Enabling SNMP Feature

This section details how to enable SNMP on your GWN76XX access points.

Enable SNMPv1/SNMPv2c

Please refer to the following steps to enable SNMPv1 and SNMPv2c in GWN76xx access points:

1. Access the GWN76xx web GUI under Service → SNMP.
2. Under the SNMPv1, SNMPv2c section, press the "Enable" toggle.
3. Enter the Community String. This should match the setting in your Network Management System (NMS) or SNMP testing tool. The default is "public", but it can be changed to any desired string.

Description of Figure 1: Enabling SNMPv1, SNMPv2c: This figure shows the Grandstream GWN76xx web interface for SNMP configuration. It displays the 'SNMPv1, SNMPv2c' section with an 'Enable' toggle switch, a text input field labeled 'Community String' currently set to 'public', and 'Save' and 'Reset' buttons.

Enable SNMPv3

Please refer to the following steps to enable SNMPv3 in GWN76xx access points:

1. Access the GWN76xx web GUI under Service → SNMP.
2. Under the SNMPv3 section, press the "Enable" toggle.
3. Fill in the SNMPv3 Username (e.g., "test").
4. Set the other parameters for Authentication and Privacy. Please refer to the table below for parameter descriptions.

Description of Figure 2: Enabling SNMPv3: This figure illustrates the Grandstream GWN76xx web interface for SNMPv3 configuration. It shows the 'SNMPv3' section with an 'Enable' toggle, a 'Username' input field (e.g., 'test'), 'Authentication Mode' dropdown (default 'MD5'), 'Authentication Password' field, 'Privacy Mode' dropdown (default 'DES'), 'Privacy Password' field, and 'Save'/'Reset' buttons.

Testing SNMP Feature

After configuring SNMP on the GWN76xx access point, you can test SNMP using your enterprise monitoring system or a free SNMP test tool. This document uses the “iReasoning MIB browser”, an easy-to-use SNMP tester with Free and Professional versions for SNMPv3.

Follow these steps to test SNMP using iReasoning MIB Browser:

1. Download the MIB Browser Personal Edition from: http://ireasoning.com/download.shtml
2. Double-click "setup.exe” to start the installation.
3. Once the installation is complete, the tool will launch.
4. Click on “File” then “Load MIBs” to import the GWN76xx MIB.

Description of Figure 3: Load GWN76xx MIB: This figure shows the iReasoning MIB Browser interface. It displays the main window with menus (File, Edit, Operations, Tools, Bookmarks, Help), an 'Address' input field set to '192.168.5.179', an 'Advanced...' button, and a 'SNMP MIBS' tree structure showing 'MIB Tree' and a path 'iso.org.dod.internet'.

5. Enter the IP address of the GWN76xx access point in the Address tab (e.g., 192.168.5.179).
6. Click on "Advanced...".

• If SNMPv1 or SNMPv2c is selected, enter the Read Community. This should be the same as the "Community String" set on the GWN76xx.

Description of Figure 4: MIB Browser settings SNMPv1/SNMPv2c: This figure shows the 'Advanced Properties of SNMP Agent' dialog box for SNMPv1/v2c. Fields include 'Address' (192.168.5.179), 'Port' (161), 'Read Community' (masked), 'Write Community' (masked), and 'SNMP Version' (set to 2), with 'Ok' and 'Cancel' buttons.

• If SNMP version 3 is selected, fill in the Username, and the Authentication and Privacy settings. These settings should match those configured on the GWN76xx.

Description of Figure 5: MIB Browser SNMPv3 settings: This figure shows the 'Advanced Properties of SNMP Agent' dialog box for SNMPv3. Fields include 'Address' (192.168.5.179), 'Port' (161), 'SNMP Version' (set to 3), and a 'SNMPv3' section with 'USM User', 'Security Level' (auth, priv), 'Auth Algorithm' (MD5), 'Auth Password', 'Privacy Algorithm' (DES), and 'Privacy Password', with 'Ok' and 'Cancel' buttons.

After configuring the parameters as shown in the above steps, you can start sending SNMP GET messages to the GWN76xx access point to retrieve information such as: Device uptime, Firmware version, Model, etc.

Description of Figure 6: SNMP GET responses: This figure displays a screenshot of the iReasoning MIB Browser's 'Result Table' after performing an SNMP GET operation. It shows retrieved data for a GWN7610, including its model, firmware version (1.0.19.5), device uptime (48 hours 56 minutes 59 seconds), and MAC address (00:0b:82:aa:d4:d8).

GWN76XX MIB Reference

You can download the MIB for GWN76xx Wi-Fi access points from the following link:

http://firmware.grandstream.com/GRANDSTREAM-GWN-MIB.my