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This article explains how to use the snmpwalk command line tool (Linux) or the iReasoning MIB Browser (Windows) to explore which SNMP OIDs are provided from a specific network device.  This output is helpful when troubleshooting why a network device is failing to add into up.time.
If there is an issue adding a Network Device element to up.time, it is possible to review the OID's available on the network device by using the snmpwalk command line tool available on most Linux installs or by using the Windows GUI tool, iReasoning MIB Browser.
It is possible to identify if there are any OID's missing that up.time requires for monitoring the Network Device.  A list of the OID's used by up.time is available in the Configuration and Performance Metrics for Network Devices article.
Snmpwalk and iReasoning MIB Browser can be installed on any server that has network access to the network device that will be analyzed but it is helpful to install on the up.time Monitoring Station server to also test the SNMP connectivity between the Monitoring Station and the network device.

Net-SNMP's snmpwalk

  1. If snmpwalk is not already installed, use the Operating System's package management tool (e.g. yast or yum) to install it or download it from http://www.net-snmp.org/download.html.

  2. Run the following command to list all of the OID's available from the network device where <community string> is the proper SNMP community string set on the network device and <hostname> is the hostname or IP address of the device:

    snmpwalk -v 2c -c <community string> <hostname> .1.3
  3. Review the output to make sure all of the OID's that up.time requires are present.

iReasoning MIB Browser

  1. Download the application at http://www.ireasoning.com/downloadmibbrowserlicense.shtml and install on the Windows-based up.time Monitoring Station server.
  2. Open the MIB Browser application and in the tool bar, enter "10.6.10.5" in the Address field.
  3. Click the Advanced... button to enter the community string.
  4. From the Operations drop down, select Walk, then click Go.
  5. Review the output to make sure all of the OID's that up.time requires are present.

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