...
- Issues: This tab summarizes network status. For more information, see Viewing Issues in the Network and Issues and the Network Scorecard.
- Changes: This tab summarizes changes made to the network. It is a window into the various changes in configuration for the devices in the network. For more information, see Viewing Changes in the Network.
- Policy Compliance: This tab summarizes policy compliance for device groups and devices. For more information, see Introducing Policy Compliance.
- Performance: This tab summarizes device operations in charts and tables. For more information, see Viewing the Performance of Network Devices.
| Anchor | ||||
|---|---|---|---|---|
|
| Anchor | ||||
|---|---|---|---|---|
|
| Anchor | ||||
|---|---|---|---|---|
|
| Anchor | ||||
|---|---|---|---|---|
|
...
The Changes tab (Network Analysis –> > Changes) summarizes changes made to the network. The main Changes table shows more specific information about each detected change. The two following charts appear in the bottom half of the Changes page:
...
| Note | ||
|---|---|---|
| ||
Each table row in the Network Analysis –> > Changes table represents a change to a device's configuration, not the device itself. A single device may have several individual changes listed in the table. Related data presentation that makes this clear is seen in the Most Changed Devices chart. |
...
Custom fields can be defined for additions to tables. These custom fields are not shown in the Changes table by default. The custom fields must be defined in NetMRI before using them in other data tables. See the Defining and Using Custom Fields topic for more information.
To display custom field columns in the Network Analysis –> > Changes table, complete the following:
...
The Policy Compliance tab (Network Analysis –> > Policy
| Anchor | ||||
|---|---|---|---|---|
|
A basic example involves the idea that you should never allow a device with the default admin/admin login tuple to be placed in the production enterprise network. Therefore, you use a Policy Rule mandating this. Policy Compliance also goes much deeper. NetMRI provides Policies based on IAVA and DISA guidelines (and others) to normalize and harden devices against intrusion and unauthorized usage. The guidelines and precepts governing Policies are extensive enough to be beyond the scope of this Admin Guide. The best way to get acquainted with the details of Policy Compliance is to read the descriptions of Rules within individual Policies. Go to Network Analysis –> > Policy Compliance –> > Policies, select a Policy, and open the tree of Rules in the right panel.
NetMRI's standard model is to deploy policies across an entire Device Group. You can use the standard Policies built into NetMRI. Infoblox recommends using the built-in Policies to develop new ones customized for your network's requirements.
When a Policy Rule is violated, the Rule violation is detected by NetMRI and an Issue message displays in the Network Analysis –> > Issues page. In most circumstances, an Error message (the highest Issue severity) is thrown by a Policy violation.
To view a summary for a policy as applied to a device group, hover over the status icon.
To view policy compliance by device group, click All Devices in the Select Device Groups panel to the right of the table. The table will show a summary of policy compliance for each device group.
...
NetMRI provides a set of handy tools under Network Analysis for checking the h
| Anchor | ||||
|---|---|---|---|---|
|
Choose any Performance menu item from the Performance tab (Network Analysis –> > Performance) and then choose from the Select Device Groups menu on the right. The Performance section summarizes network device performance in a set of charts and tables, including the following:
...
| Anchor | ||||
|---|---|---|---|---|
|
| Anchor | ||||
|---|---|---|---|---|
|
Go to Network Analysis –>> Performance –> > Performance –> > CPUs to view the distribution of CPU utilization over the reporting period for all devices on the network, or for any device group, for which that data is accessible via SNMP. Viewing CPU performance levels enables you to determine whether particular devices or groups of devices are being stressed by excessive workloads. Each level of CPU usage on the X-axis of the chart represents a level of used CPU cycles, from the lowest values to the highest values from left to right. The maximum is 100%. All devices from the selected device group falling into specific levels of CPU utilization are grouped into those values on the X-axis.
...
| Anchor | ||||
|---|---|---|---|---|
|
| Anchor | ||||
|---|---|---|---|---|
|
Go to Network Analysis –> > Performance –> > Performance –> > Free Memory to view the distribution of free memory on devices in operation over the current reporting period, for all devices on the network or for a chosen device group, for which that data is accessible via SNMP. Each level of memory usage on the X-axis of the chart represents a level of free memory, from the lowest values to the highest values from left to right. All devices falling into specific levels of free memory are grouped into those values on the X-axis.
Devices with low free memory levels can indicate an inefficient or poorly matched configuration such as a router whose routing table or routing information base (RIB) is too large, or possible memory leaks.
...
| Anchor | ||||
|---|---|---|---|---|
|
| Anchor | ||||
|---|---|---|---|---|
|
Go to Network Analysis –> > Performance –> > Performance –> > Uptimes to view the distribution of uptimes as of the given date for all routers and switches on the network or for a chosen device group for which that data is accessible via SNMP. Uptimes enables you to evaluate device reliability.
...
| Anchor | ||||
|---|---|---|---|---|
|
| Anchor | ||||
|---|---|---|---|---|
|
Go to Network Analysis –> > Performance –> > Performance –> > Interfaces to view the distribution of interface utilization on the specified day, for the entire network or for a chosen device group for which that data is accessible via SNMP (interfaces having zero throughput are excluded). This process can help identify interfaces having excessive utilization or errors, or that are being under-utilized, and can be used for other troubleshooting purposes.
...
| Anchor | ||||
|---|---|---|---|---|
|
| Anchor | ||||
|---|---|---|---|---|
|
Go to Network Analysis –> > Performance –> > History to begin viewing aspects of the historical behavior of all network devices on the managed network.
To work effectively with the charts on this page, choose any menu option on the left (History –> > Routes, for example), and then choose a device group from the menu on the right. The data set that is shown in any Performance, History, or Environment page will change to show the data specific to the chosen device group.
- Devices: This page summarizes the total number of devices found on the network for the reporting period, and those found for each of the last 30 days. Data sets can be shown for individual device groups. The summaries come in the form of bar charts and in data tables listing the basic data sets comprising the device types and the states the devices were in when discovered. For more information, see Device History Summaries.
- HSRPs/VRRPs: Shows the number of distinct HSRP and VRRP groups found on the network during the 30 days before the selected date.
For more information, see HSRP/VRRP Summaries. - Issues: Summarizes the number of issues by severity and difference type. For more information, see Viewing Issue Summaries.
...
- Reboots: Shows the number of reboots detected for router and switch devices for the 30 days before the selected date. Frequent reboots, or large numbers of reboots, could indicate a problem.
See the Troubleshooting Device Reboots topic for more information on this feature. - Routes: Shows the number of routes discovered on the network during the 30 days before the selected date. For more information, see Summarizing Routes.
- Subnets: Shows the number of subnets found on the network during the 30 days before the selected date. For more information, see Summarizing Subnetworks.
- VLANs: Shows the number of distinct VLANs found on the network during the 30 days before the selected date. Investigate changes in the number of VLANs. For more information, see Summarizing VLANs.
| Anchor | ||||
|---|---|---|---|---|
|
| Anchor | ||||
|---|---|---|---|---|
|
...
Devices running Cisco Hot Standby Routing Protocol (HSRP) and/or Virtual Router Redundancy Protocol (VRRP), primarily for purposes of VPN concentration, are summarized on the HSRP/VRRP page (Network Analysis tab –> > Performance tab –> > History section –> > HSRPs/VRRPs). HSRP/VRRP groups are counted by the appliance and summarized by daily count in a bar chart. Any change in the number of HSRP or VRRP groups may indicate a configuration change.
...
Navigate to the Network Analysis tab –> > Performance tab –> > History section –> > Reboots page to see which devices are experiencing reboots.
- Click the device hyperlink in the IP Address column. The Device Viewer opens for that device.
- In the Device Viewer, perform the following:
- Examine Device –> > Performance charts. The Reboots chart shows how many times the device has rebooted (click the date hyperlink to change the date). The CPU Statistics and Free Memory charts show the general state of the device before each reboot.
- A sawtoothed Free Memory chart that decreases to zero before every reboot, indicates a memory leak. Consider upgrading the device's OS.
- If CPU utilization is above 90%, the device is struggling to keep up with the workload. That might be caused by a run-away process or too much network traffic.
...
The Routes page (Network Analysis tab –> > Performance tab –> > History section –> > Routes) page provides a basic picture of the routing environment for the managed network, and for specific device groups. Click a device group in the Select Device Group panel to display information for the routing tables associated only with that device group.
...
The VLANs page (Network Analysis tab –> > Performance tab –> > History section –> > VLANs) is a network-wide or device-group-specific view of the collection of distinct VLANs in the discovered network. The table shows the total of active VLAN networks in the L3-switched environment. For more information, see Inspecting Ethernet Switches and VLANs.
...
The Environment Summary table (Network Analysis tab –> > Performance tab –> > Environment section –> > Environment) provides a large collection of environmental data for all collected devices on the network, showing the status for device components such as power supplies, system fans, and chassis temperature. Each device also lists its associated Network View. Clicking the Network View name opens the Network View editor window. By default, this table is sorted by IP address, which you can sort by column by clicking a respective column header.
Also, clicking the right end of any column heading will show a Sort Ascending and Sort Descending option along with a Columns option. Hovering over Columns enables you to add or remove columns of data from the Environment Summary table.
The Environment Summary table lists power supply, fan, and temperature data for devices that monitor these environmental conditions.