NetMRI discovery depends on a collection of under-the-hood features to ensure that polling and addition of devices in the network proceed smoothly and accurately. This chapter describes three critical tasks:
Defining Data Collection and Device Groups–You must define important settings for network polling. Emphasis in this topic area involves the processes of data collection and polling of devices across the network, including polling of switched Ethernet devices. Definition of device and interface groups is discussed in other topics later in this Guide. The topic Defining Group Data Collection Settings provides more information.
Note: See Creating Device Groups for information on the Groups tab and its associated functions.
Managing SNMP and CLI Credentials–Credentials are a critical component for discovery and Configuration Management. Define global default values for admin account logins and enable passwords, and also define admin account logins and enable passwords on individual devices. The topic Adding and Editing Device Credentials provides more information.
Debugging and Managing Collection Results–When data collection and polling stops for any reason, NetMRI provides methods for determining the cause of the failure and ways to fix it. See Debugging Issues in Discovery and Data Collection and Running Discovery Diagnostics for more information.
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The following figure shows how SNMP collection settings control collection at the network, group and device levels.
SNMP Collection for the entire network
Set in Settings icon –> Setup section –> Collectors and Groups –> Global tab -> Network Polling paneSNMP Collection for a device group
Set in Settings icon –> Setup section –> Collectors and Groups –> Groups tab -> Device Groups side tabSNMP Collection for a single device
Set in Settings & Status section –> General Settings pageIf collection is disabled
for the netwoorrkk...If collection is enabled for the netwoorrkk,
group collection is coonntrolled by...If collection is enabled
for the netwoorrkk but disabled for a group...If collection is enabled for the netwoorrkk and the
pareennt device group, device collection is coonntrolled by...If collection is enabled
for the netwoorrkk and the device group but disabled for a device...Data collection to this level is available for viewing. No new data is added; Group SNMP collection and individual device SNMP status settings are ignored.
No data collection takes place for any device in the group. Device SNMP status settings are ignored.
No SNMP data collection takes place for the device.
Features for enabling and disabling SNMP collection are available in the following locations:
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Config Collection: | Warning icons in the CC column indicate possible configuration data |
Config Not Changed | The configuration for the device has not changed since the previous polling of the device. No problem is indicated here unless you have pushed a changed configuration to the device. Even in those cases, allow some more time for the device to synchronize with NetMRI. If you expect changes to be reflected in device polling. go to Device Viewer–> Configuration Management–> Config Explorer and check the Running Config Saved? status line. If the answer is No, ensure the changes in the device's running-config are saved according to the device's configuration data saving requirements. |
CLI Credentials Unknown | NetMRI cannot obtain the device configuration due to not having the correct CLI username/password tuple, and credential guessing did not work for the device. Go to the Device Viewer –> Settings & Status –> CLI Credentials page for that device. click Edit and enter the necessary values for the SSH and/or Telnet login tuple and the Enable Password if necessary. Each attempt at connection and collection is listed in the table. Note that the C column, for CLI Credentials Status, may show an Error, usually listed as Failed to authenticate: Invalid Username and/or password. |
Configuration Collection Disabled Globally | This message appears for devices that support configuration collection, but the collection was skipped because Config Collection is globally disabled in NetMRI. The same message appears in the Device Viewer–> Settings & Status –> Management Status page. Go to Settings icon –> Setup –> Collection and Groups –> Groups –> Config Management side tab, and enable the Config Collection checkbox. Also ensure the proper protocols (SSH, Telnet, HTTP) are enabled for config collection. |
Configuration Collection Enabled Globally, All Protocol Options Disabled | This message appears for devices that support configuration collection, but the collection was skipped because Config Collection is globally enabled in NetMRI but no data collection protocols were enabled. The same message appears in the Device Viewer–> Settings & Status –> Management Status page. Go to Settings icon –> Setup |
Configuration Collection Disabled at Device Group level | The device showing this message currently has config collection disabled for the Device Group to which the device belongs. Go to Settings icon –> Setup –> Collection and Groups –> Groups, click the Action icon and choose Edit for the selected Device Group. In the Group Settings tab, enable the Config Collection checkbox. |
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