Monitoring switch ports

nVision automatically reads port information for every SNMP-manageable switch. This information is presented in graphical form in the Host info / SNMP / Port mapper window. The following table lists the meaning of every image:

Icon	Description
	The port is active, but nothing is connected to it.
	The port is active with plug connected.
	The port is inactive (disabled) and nothing is connected to it.
	The port is inactive (disabled) with plug connected.

The tab may not be available in the beginning (after the network is scanned). It will show automatically only when nVision reads the SNMP information from the “dot1dBasePortTable” table (OID: 1.3.6.1.2.1.17.1.4), which may take some time. If the tab is not shown for a long time, please make sure that SNMP on this host is available and you properly configured the SNMP community in the host properties.

To enable port mapping on a switch:

1.Navigate to the Host info window.

2.In the General tab, check Enable monitoring field (services, counters, SNMP, port mapping, Windows).

3.In the SNMP / SNMP browser tab, check the SNMP manageable device field and click the Configure login credentials – link, and then configure a correct SNMP community (set in the device management panel). Make sure the login credentials are correct by clicking the Test login data button (the test should terminate with “SNMP community test successful” message).

The port mapping tab should appear in the Device information window.

If the above settings are configured correctly and the mapper port tab is still not generated, make sure the table “dot1dBasePortTable” is available at the given device (by reading its contents in the “SNMP” tab according to the tree specified in the link below).

http://tools.cisco.com/Support/SNMP/do/BrowseOID.do?local=en&translate=Translate&objectInput=1.3.6.1.2.1.17.1.4#oidContent