diff --git a/io/snmp/snmp.js b/io/snmp/snmp.js
index a1159ac0..3bfc25fa 100644
--- a/io/snmp/snmp.js
+++ b/io/snmp/snmp.js
@@ -3,6 +3,16 @@ module.exports = function(RED) {
     "use strict";
     var snmp = require("net-snmp");
 
+    var sessions = {};
+
+    function getSession(host, community, version){
+        var sessionKey = host + ":" + community + ":" + version;
+        if (!(sessionKey in sessions)){
+            sessions[sessionKey] = snmp.createSession(host, community, {version: version});
+        }
+        return sessions[sessionKey];
+    }
+
     function SnmpNode(n) {
         RED.nodes.createNode(this,n);
         this.community = n.community;
@@ -16,8 +26,7 @@ module.exports = function(RED) {
             var community = node.community || msg.community;
             var oids = node.oids || msg.oid;
             if (oids) {
-                node.session = snmp.createSession(host, community, {version: node.version});
-                node.session.get(oids.split(","), function(error, varbinds) {
+                getSession(host, community, node.version).get(oids.split(","), function(error, varbinds) {
                     if (error) {
                         node.error(error.toString(),msg);
                     }
@@ -42,12 +51,6 @@ module.exports = function(RED) {
                 node.warn("No oid(s) to search for");
             }
         });
-
-        this.on("close", function() {
-            if (node.session) {
-                node.session.close();
-            }
-        });
     }
     RED.nodes.registerType("snmp",SnmpNode);
 
@@ -72,8 +75,7 @@ module.exports = function(RED) {
             var oids = node.oids || msg.oid;
             if (oids) {
                 msg.oid = oids;
-                node.session = snmp.createSession(host, community, {version: node.version});
-                node.session.table(oids, maxRepetitions, function(error, table) {
+                getSession(host, community, node.version).table(oids, maxRepetitions, function(error, table) {
                     if (error) {
                         node.error(error.toString(), msg);
                     }
@@ -107,12 +109,6 @@ module.exports = function(RED) {
                 node.warn("No oid to search for");
             }
         });
-
-        this.on("close", function() {
-            if (node.session) {
-                node.session.close();
-            }
-        });
     }
     RED.nodes.registerType("snmp table",SnmpTNode);
 
@@ -144,8 +140,7 @@ module.exports = function(RED) {
             var oids = node.oids || msg.oid;
             if (oids) {
                 msg.oid = oids;
-                node.session = snmp.createSession(host, community, {version: node.version});
-                node.session.subtree(msg.oid, maxRepetitions, feedCb, function(error) {
+                getSession(host, community, node.version).subtree(msg.oid, maxRepetitions, feedCb, function(error) {
                     if (error) {
                         node.error(error.toString(), msg);
                     }
@@ -161,12 +156,6 @@ module.exports = function(RED) {
                 node.warn("No oid to search for");
             }
         });
-
-        this.on("close", function() {
-            if (node.session) {
-                node.session.close();
-            }
-        });
     }
     RED.nodes.registerType("snmp subtree",SnmpSubtreeNode);
 
@@ -199,8 +188,7 @@ module.exports = function(RED) {
             var community = node.community || msg.community;
             if (oids) {
                 msg.oid = oids;
-                node.session = snmp.createSession(host, community, {version: node.version});
-                node.session.walk(msg.oid, maxRepetitions, feedCb, function(error) {
+                getSession(host, community, node.version).walk(msg.oid, maxRepetitions, feedCb, function(error) {
                     if (error) {
                         node.error(error.toString(), msg);
                     }
@@ -216,12 +204,6 @@ module.exports = function(RED) {
                 node.warn("No oid to search for");
             }
         });
-
-        this.on("close", function() {
-            if (node.session) {
-                node.session.close();
-            }
-        });
     }
     RED.nodes.registerType("snmp walker",SnmpWalkerNode);
 };