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When you hover over an icon or column heading in the table, a tooltip appears. For example, when you hover over an information icon in the MC (Membership criteria) column, it displays the complete text of the membership criteria regular expression. Any feature column that is cleared, without a checkmark, indicates that the given feature is not enabled for the device group.
Individual devices of certain types can override group-level settings. For information about device-level settings, see Interpreting Discovery Table Data.
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ARP (Refresh device caches) | Indicates whether member devices in the group will have their ARP caches refreshed before collecting discovery data. NetMRI uses ARP cache refresh to control LAN switches from which switch-forwarding data is collected. For more information, see Notes on ARP, Switch Data Collection, and End Hosts. |
SNMP | Indicates whether the device group is set to enable SNMP data collection for member devices. SNMP collection can also be enabled/disabled for groups and devices. |
PS (Port Scan) | Indicates whether members of the device group will be scanned for open protocol ports. If enabled, NetMRI probes the TCP and UDP ports listed at Settings icon –> Setup –> Port List, to determine whether they are open. For more information, see Defining Group Data Collection Settings. |
FP (Fingerprint) | Indicates the device group setting to use the Identify device using fingerprinting setting for member devices. (This setting is dependent on the Probe for Open ports feature.) A polling technique to identify each network device based on the response characteristics of its TCP stack. This information is used to determine the device type. In the absence of SNMP access, fingerprinting is usually the only way to identify non-network devices. For more information, see Defining Group Data Collection Settings. |
C (Collect configs) | Indicates the device group setting to allow config file collection for all members in the group (Collect config files). |
CCS (CCS scripting) | Indicates the device group setting to allow CCS script file execution for all members in the group (Allow Script Execution). |
| PP (Privileged Polling) | Indicates whether the option CLI polling in privileged mode (i.e. privileged exec (enable) mode) is enabled for the group the device belongs to. You can override this setting for an individual device in the Device Viewer. |
DC (Default Credentials) | Indicates the device group setting for Test for Default Credentials, used to scan for the presence of vendor default credentials for all members in the group. |
A (Issue Analysis) | Indicates the device group setting to allow Issue analysis for all members in the group (Analyze for Issues). For more information about Issue analysis, see Viewing Issues in the Network. |
CL (Config Lock) | Indicates the device group setting to collect config data but to consider all member device configs a locked and not to be changed through NetMRI (Regard configurations as 'locked'). For more information, see Defining Group Data Collection Settings. |
| UGPF (Use Global Polling Frequency) | Indicates whether the device group uses the global polling frequency value. For more information, see Setting Polling Frequency for a Device Group. |
| PF (Polling Frequency) | Indicates whether the device group uses a custom polling frequency value. For more information, see Setting Polling Frequency for a Device Group. |
NB (NetBIOS Scan) | Device polling method to collect the NetBIOS name for endpoint devices in the network. Device groups also enable NetBIOS scanning. For more information, see Defining Group Data Collection Settings. |
DB (Discovery Blackout) | Indicates the device group setting to impose discovery blackouts. For more information, see Defining Blackout Periods. |
CB (Change Blackout) | Indicates the device group setting to impose configuration change blackouts. For more information, see Defining Blackout Periods. |
SPMC (SPM | Indicates the device group setting to allow switch port data collection (Switch port data Collection). For more information, see Device Groups and Switch Port Management. |
SPMS (Polling Schedule) | Indicates whether the device group provides a polling interval or scheduling for switch port data collection. This setting is dependent on an enabled Switch port data Collection setting for the device group. |
MC (Membership Criteria) | Hovering the mouse over the check box in this column shows the complete regular expression for the selected device group. For more information, see Understanding Device Group Membership Criteria. |
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- Open the Settings icon –> Setup –> Collection and Groups –> Groups.
- Click Add to create a top-level, sibling, or child extended group.
- In the Parent ID field, NetMRI automatically sets the ID of the parent group. It is "0" for a top-level or sibling group.
- Enter a Name for the group. The group name is shown in all group-related displays and reports, so the group name should be meaningful without being too long.
Define a Membership Criteria regular expression. For more information, see Understanding Device Group Membership Criteria.
Note title Note Infoblox recommends using regular expressions for refining the membership in device groups. The topic Understanding Device Group Membership Criteria provides the information you need to understand and define simple regular expressions for device groups.
- If you want the device group to include collections of discovered non-network devices, select Include non-network devices. Leaving this setting unselected prevents non-network devices from occupying valuable licensing space.
- Next to Type, click Extended.
- Rank: Displays the Ranking value as the default sort order. For more information, see Ranking Device Groups. Ranking value is used as the default sort order for all group-related tables, with the highest rank shown first. Rank is also used to determine the individual device settings controlling processing for each device.
Polling Frequency: Allows you to slow down or speed up the device polling frequency. For more information, see the following section, Setting Polling Frequency for a Device Group.
For Switch Port data Collection, choose from the following:
- Use Global Settings: Select this to enable the device group to inherit global settings for switch port data collections. You can find the global settings in Settings icon –> Setup –> Collection and Groups –> Global –> Switch Port Management. For more information, see Global Switch Port Management Polling Settings.
- Specify Polling Interval: Overrides the global polling interval with a custom polling interval for the current device group. You can define an interval of 1-60 Minutes or 1-24 Hours in the fields that appear.
- Specify Schedule: Overrides the global scheduled polling setting with a custom schedule for the current device group. Existing schedules may appear in the list or, click Add New Schedule to create a new polling schedule instance. Choose a Recurrence Pattern of Once, Hourly, Daily, Weekly, or Monthly. In all cases, you must choose an Execution Time and select at least one day of the week check box.
- Poll Now: Click to execute switch port polling on the device group right after it is created.
Disable: Completely disables switch port polling for the device group.
Note title Note The global or group-level polling frequency modifier described in the previous step does not affect settings for switch port data collection frequency.
- Activate the processing options for the new Extended group:
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For more information about discovery blackouts and change blackouts, see Defining Blackout Periods. |
13. If necessary, select the Enable Change Blackout check box and click its Scheduling icon. The scheduling options appear. Follow steps 12a through 12e to define the change blackout schedule.
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Some devices in your network may have a locked Config Change setting (Device Viewer –> Settings & Status –> General Settings), which means that NetMRI will be disallowed from changing configurations on the device. In these cases, a device-level Enable Change Blackout setting is unnecessary. Similarly, each NetMRI device group has a Regard configurations as 'locked' setting. If a device group uses this setting, the Enable Change Blackout setting is unnecessary. If a device group does not enforce a change blackout, but a device in that group enables the Regard configurations as 'locked' setting, the device setting takes precedence. |
1314. Click Save & Close or Save & New.
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You can set global or individual polling frequency for a an extended device group. You do so by specifying a polling frequency modifier. This is a coefficient by which the default NetMRI setting is multiplied. The higher the coefficient, the more frequently devices in the current group are polled.
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Setting a custom polling frequency may affect performance. High modifier coefficient results in polling performed more frequently, so the NetMRI unit may be more busy than usual. |
The default NetMRI polling frequency is located in Settings icon –> Setup –> Device Collection Status. The global polling frequency modifier is located in Settings icon –> General Settings –> Advanced Settings –> Data Collection –> Polling Frequency Modifier.
You can set values between 0.5 and 2 for the global or group-level polling frequency modifier. Interpret the values as follows:
- 0.5: makes Makes polling twice slower.
- 1: means Means same polling frequency as the default setting.
- 2: makes Makes polling twice faster.
As NetMRI recalculates polling frequency every 10 minutes, the new polling frequency is applied to the group not later than 10 minutes after you specified it.
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- Open the Settings icon –> Setup –> Collection and Groups –> Groups.
- Click Add for a new group or open an existing extended device group for editing.
- In Polling Frequency, select one of the following:
- Use Global Settings: Select this to enable the device group to inherit the global polling frequency modifier setting.
Specify Polling Frequency: Allows you to set individual polling frequency for the current device group.
If you select Specify Polling Frequency, the Polling Frequency Modifier field appears.
- In the Polling Frequency Modifier field, specify the coefficient that modifies the device group polling frequency relative to the default NetMRI setting.
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The Currently, the polling frequency modifier , both global and group-level, does not apply to SDN devices as they use a different polling engine. |
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