Added SNMPInterfaceCollector README

src/collectors/snmp/README.md

@@ -0,0 +1,40 @@
+SNMPInterfaceCollector
+=====
+
+The SNMPInterfaceCollector is designed for collecting interface data from remote SNMP-enabled devices such as routers and switches.
+
+Installation
+=====
+
+The snmpinterfacecollector.py module should be installed into your Diamond installation collectors directory. This directory is defined
+in diamond.cfg under the *collectors_path* directive. This defaults to */usr/lib/diamond/collectors/* on Ubuntu.
+
+The SNMPInterfaceCollector.cfg file should be installed into your diamond installation config directory. This directory is defined
+in diamond.cfg under the *collectors_config_path* directive. This defaults to */etc/diamond/* on Ubuntu.
+
+Once the collector is installed and configured, you can wait for diamond to pick up the new collector automatically, or simply restart diamond.
+
+Configuration
+=====
+
+Below is an example configuration for the SNMPInterfaceCollector. The collector can collect data any number of devices by adding configuration sections
+under the *devices* header. By default the collector will collect every 60 seconds. This might be a bit excessive and put unnecessary load on the 
+devices being polled. You may wish to change this to every 300 seconds. However you need modify your graphite data retentions to handle this properly.
+
+    # Options for SNMPInterfaceCollector
+    path = interface
+    interval = 60
+
+    [devices]
+
+    [[router1]]
+    host = router1.example.com 
+    port = 161
+    community = public
+
+    [[router2]]
+    host = router1.example.com 
+    port = 161
+    community = public
+
+Note: If you modify the SNMPInterfaceCollector configuration, you will need to restart diamond.