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- Devices: The broadest information category, includes five distinct subcategories to allow for more-specific exploration: Infrastructure Devices, Device Components, Connected End Hosts (client systems connected to access ports on switches, for example), Connected IP Phones, and All Devices. For more information, see Viewing Devices.
- Virtual Devices: All network infrastructure devices discovered by NetMRI that possess virtualization capabilities. Each device in this category hosts one or more virtual device contexts, which are virtual machine-based switches, firewalls, and routers housed by each virtual host. For more information, see Viewing Virtual Device Contexts.
- Interfaces: A listing of all network interfaces, divided into four functional categories: Interface Config, Unused Down Ports, Unused Up Ports, and Recently Changed Ports. For more information, see Viewing Network Interfaces.
- OSs: Counts of operating systems and OS versions from all devices discovered and cataloged by NetMRI. For more information, see Viewing Network Operating Systems.
- Models: Counts of all hardware models discovered and cataloged by NetMRI. For more information, see Viewing Network Device Models.
The Inventory tab (Network Explorer –> > Inventory tab) provides basic information about four key categories of network elements managed by NetMRI: Devices, interfaces, operating systems, and device models discovered in the network. From here, you drill down to features such as the Device Viewer to inspect details about individual devices and their current states.
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Some Network Explorer –> > Inventory pages (Connected End Hosts, Connected IP Phones, Interface Config) provide Date/Period menus that enable flexible measurement and reporting for any device, interface or end host. You can go backward in time to view data sets for any device, interface, or end host phenomena.
Calendar dates shown in green represent an immediately available data set to display in a Network Explorer –> > Inventory table. The most current date in the chosen Inventory page (such as the most recent 7 days for the Daily selection) is always available by default and appears highlighted in green. Older data may require a wait for the user while NetMRI generates the requested data. After generation, the requested date appears in green, indicating the data is available.
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NetMRI supports discovery and management of Cisco and Juniper device types that offer virtualization. Similar to servers that run VMware to run multiple instances of operating systems and data services in the same physical host, some Cisco and Juniper device types support multiple instances within the same device, each running the complete suite of protocols, configurations, and operating system. NetMRI calls these instances virtual device contexts (VDCs). NetMRI detects devices that support virtual device contexts and provides the same management and cataloging features that apply to conventional switches, routers, and firewalls.
The Inventory page –> > VirtualDevices menu item provides a list of all VDC–supporting devices that are discovered and cataloged by NetMRI. It displays the following values:
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Each individual virtual device context appears in the Device Viewer, in the Network Explorer –> > Inventory page, and in other locations of the NetMRI UI. NetMRI treats virtual device contexts identically to conventional routers, switches and firewall appliances, including the ability to send commands, schedule and execute jobs, display running configurations, view change histories and issues reported from the virtual device, apply compliance policies, run traces and SNMP walks, and many other operations.
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Check the Virtual Asset Inventory report (under Reports –> > Standard Reports) for more information on the virtual hosts and their respective VDCs.
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The Cisco ASA uses the term "Customer Context" as a label for all virtual firewalls with their own discrete configurations and allocated interfaces. These entities are labeled as Virtual Device Contexts in the NetMRI system. These virtual "devices" support their own distinct topologies that can differ significantly from the hosting ASA firewall.
You can use the Topology Viewer (Network Explorer –> > Topology) to look at the links between the Virtual Hosts and other devices in the network. Drilling further down, you use the Topology Viewer to examine the network linkages for the virtual device contexts themselves. Their topologies will often bear no relationship to the topologies of the virtual hosts upon which they are running. For more information, see Using the Topology Viewer.
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The Interfaces page (Network Explorer –> > Inventory –> > Interfaces) lists interfaces found on the network, and provides configuration data for each. All interface tables can show associated information including IP configuration, associated device name, VRF Name (if any), VLAN and trunking status, line speed (where applicable), and a Network View column.
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Clicking any link in the Interface column displays the Interface Viewer for the chosen device port, with features for viewing interface settings and performance metrics, and a Settings icon –> > Port Control Settings feature for setting an interface to administratively Up or Down, changing a VLAN assignment, or rewriting the port description.
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