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diff --git a/docs/userguide/collectd.userguide.rst b/docs/userguide/collectd.userguide.rst
index b54b1afc..855b0367 100644
--- a/docs/userguide/collectd.userguide.rst
+++ b/docs/userguide/collectd.userguide.rst
@@ -38,9 +38,12 @@ Other plugins under development or existing as a pull request into collectd mast
* Open vSwitch stats Plugin: A read plugin that retrieve flow and interface
stats from OVS.
-* SNMP write: A write plugin that will act as a SNMP subagent and will map
- collectd metrics to relavent OIDs. Will only support SNMP: get, getnext and
- walk.
+* SNMP Agent: A write plugin that will act as a AgentX subagent that receives
+ and handles queries from SNMP master agent and returns the data collected
+ by read plugins. The SNMP Agent plugin handles requests only for OIDs
+ specified in configuration file. To handle SNMP queries the plugin gets data
+ from collectd and translates requested values from collectd's internal format
+ to SNMP format. Supports SNMP: get, getnext and walk requests.
* Legacy/IPMI: A read plugin that reports platform thermals, voltages,
fanspeed, current, flow, power etc. Also, the plugin monitors Intelligent
@@ -590,6 +593,121 @@ https://github.com/collectd/collectd/blob/master/src/collectd.conf.pod
and
https://github.com/maryamtahhan/collectd/blob/feat_ovs_stats/src/collectd.conf.pod
+SNMP Agent Plugin:
+------------------
+Repo: https://github.com/maryamtahhan/collectd/
+
+Branch: feat_snmp
+
+Dependencies: NET-SNMP library
+
+Start by installing net-snmp and dependencies.
+
+On ubuntu:
+
+.. code:: bash
+
+ $ apt-get install snmp snmp-mibs-downloader snmpd libsnmp-dev
+ $ systemctl start snmpd.service
+
+Or build from source
+
+Become root to install net-snmp dependencies
+
+.. code:: bash
+
+ $ apt-get install libperl-dev
+
+Clone and build net-snmp
+
+.. code:: bash
+
+ $ git clone https://github.com/haad/net-snmp.git
+ $ cd net-snmp
+ $ ./configure --with-persistent-directory="/var/net-snmp" --with-systemd --enable-shared --prefix=/usr
+ $ make
+
+Become root
+
+.. code:: bash
+
+ $ make install
+
+Copy default configuration to persistent folder
+
+.. code:: bash
+
+ $ cp EXAMPLE.conf /usr/share/snmp/snmpd.conf
+
+Set library path and default MIB configuration
+
+.. code:: bash
+
+ $ cd ~/
+ $ echo export LD_LIBRARY_PATH=/usr/lib >> .bashrc
+ $ net-snmp-config --default-mibdirs
+ $ net-snmp-config --snmpconfpath
+
+Configure snmpd as a service
+
+.. code:: bash
+
+ $ cd net-snmp
+ $ cp ./dist/snmpd.service /etc/systemd/system/
+ $ systemctl enable snmpd.service
+ $ systemctl start snmpd.service
+
+Add the following line to snmpd.conf configuration file
+"/usr/share/snmp/snmpd.conf" to make all OID tree visible for SNMP clients:
+
+.. code:: bash
+
+ view systemonly included .1
+
+To verify that SNMP is working you can get IF-MIB table using SNMP client
+to view the list of Linux interfaces:
+
+.. code:: bash
+
+ $ snmpwalk -v 2c -c public localhost IF-MIB::interfaces
+
+Clone and install the collectd snmp_agent plugin:
+
+.. code:: bash
+
+ $ git clone https://github.com/maryamtahhan/collectd
+ $ cd collectd
+ $ git checkout feat_snmp
+ $ ./build.sh
+ $ ./configure --enable-syslog --enable-logfile --enable-debug --enable-snmp --with-libnetsnmp
+ $ make
+ $ sudo make install
+
+This will install collectd to /opt/collectd
+The collectd configuration file can be found at /opt/collectd/etc
+**SNMP Agent plugin is a generic plugin and cannot work without configuration**.
+To configure the snmp_agent plugin you need to modify the configuration file to
+include OIDs mapped to collectd types. The following example maps scalar
+memAvailReal OID to value represented as free memory type of memory plugin:
+
+.. code:: bash
+
+ LoadPlugin snmp_agent
+ <Plugin "snmp_agent">
+ <Data "memAvailReal">
+ Plugin "memory"
+ Type "memory"
+ TypeInstance "free"
+ OIDs "1.3.6.1.4.1.2021.4.6.0"
+ </Data>
+ </Plugin>
+
+For more information on the plugin parameters, please see:
+https://github.com/maryamtahhan/collectd/blob/feat_snmp/src/collectd.conf.pod
+
+For more details on AgentX subagent, please see:
+http://www.net-snmp.org/tutorial/tutorial-5/toolkit/demon/
+
Installing collectd as a service
--------------------------------
Collectd service scripts are available in the collectd/contrib directory.