The Summaries tab (Network Explorer –> Summaries) lists routes, subnets, VLANs, Route Targets, HSRPs/VRRP groups, ports, NIOS grids, network views, and VRFs (virtual routing and forwarding instances) in the network.

• To list inventoried items, click the desired category in the left panel.
• To restrict the center panel table to a specific device group, click the group name in the Select Device Groups panel (on the right side of the window).
• To view details about any item in the left panel, click the row for that item. Details appear in the center panel.

Summarizing Network Routes and Subnets

The Routes section lists routes reported by all devices in the network, from each of their interfaces, during the last network polling cycle by NetMRI. Routes are listed by the protocol (proto), the route's IP, the VRF Name containing the interface, its VRF route distinguisher, and the Count. The count is the number of devices reporting that particular route during the last polling period. All IPv4 and IPv6 routes are listed for all router and switch-router devices.

• To list devices comprising the route, click a route in the left panel. The center panel refreshes to show the device reporting the route, the route's interface from which it was reported, the Network View for the management IP of the device reporting the route, and the route's Next Hop. The list also shows each device's Route Distinguisher. This feature can be helpful in tracing a path.
• To view detailed data for a device, click the IP address hyperlink in the center panel. The Device Viewer opens.

The Subnets section lists subnets found in the network, the Network View for the management IP of the device reporting the subnets, and its VRF Name (if any). The list of subnets is compiled from all router and switch-router devices discovered and cataloged by NetMRI, including any virtual device contexts (VDC).

• For subnets, the Count is the number of devices discovered as part of the subnet during the last polling period.
• To list all devices in the subnet, click a subnet in the left panel.
• To view detailed data for any device in a subnet, click the IP address hyperlink in the right panel. The Device Viewer opens, listing any current Issues associated with the selected device.

The Device Viewer is not limited to this information. Seven categories of detailed information are provided by the Device Viewer for the displayed network entity. For more information, see Inspecting Devices in the Network.

Summarizing VLANs, Ports, Virtual Groups, and NIOS Grids

The VLANs section lists VLANs found in the network.

• To list devices supporting a VLAN, click a VLAN name in the left panel. The VLAN Viewer appears, listing the devices by IP address that are associated with the VLAN.

The main page also displays the VLAN Root Details listing for the selected VLAN, and the table of devices associated with the VLAN, listing by IP address. Clicking an IP address in the VLANs table also brings up the Device Viewer.

• Also, check the Topology Viewer (Network Explorer –> Topology) to see a graphic presentation of the VLAN path.

The Ports section lists ports found in the network. This table is a superset of all the ports listed in the Switch Port Manager page. If your license is active only for Switch Port Manager, the switch ports discovered and polled by NetMRI are the only ports listed here.

• To list devices using a given port number, click the port number in the left panel.

The NIOS Grids section lists any Infoblox NIOS Grid Masters found in the network.

• To list a Grid Master's members, click the Grid Master in the left panel. All associated Grid member appliances appear in the center panel.

Summarizing HSRP/VRRP Groups

You can list all HSRP/VRRP Groups managed by NetMRI, or the HSRP/VRRP groups that are associated with a particular device group.

The HSRPs/VRRP Groups section lists Hot Standby Router Protocol (HSRP) groups and Virtual Router Redundancy Protocol (VRRP) groups found in the network, starting with the Virtual IP address of the group. Types are labeled in the Type column as HSRP or VRRP. The protocols are used for fault-tolerant default gateway configuration across two or more devices in case the primary gateway router becomes inaccessible.

To view details for an HSRP or VRRP, click a group in the left panel. The corresponding viewer opens in a popup window. The devices participating in the group are listed in the viewer.

Summarizing Route Targets

VRFs use route targets to specify how routes will be shared between different VRF networks. The typical format of a Route Target is two numeric values separated by colons. For example,
27000:100.

The Route Targets summary in the left panel shows the list of Import and Export route targets that are defined in VRF-aware devices in the managed networks. The VRF RD (route distinguisher) values are listed in a separate column, and you can click on the link for each VRF's network view, which opens the Network Viewer window. This window also lists all devices forming the VRF network.

Selecting a route target causes the center panel to display all the instances where it is being used, along with details of the device and the VRF. This is helpful to understand how VRFs and particularly VRF-Lite are configured across the network.

Summarizing Network Views

To view the complete list of network views, click the View all Network Views link at the top of the list. You can list all network views containing networks managed by NetMRI, or the network views that are associated with a particular device group. Each network view listed in the left panel provides a link to the Network View window.

The Count value indicates the number of interfaces sharing the same network view. Each instance is differentiated by the interface name.

If you have a significant number of network views, you can apply a filter by clicking the Filters button at the top of the table, choosing the Network View option from the Select a New Field selector, and entering the name of the network view.

Network Views represent each network that is managed and monitored by NetMRI. For more information about network views and how to use and configure them, see Configuring Network Views and its subsections.

Summarizing VRFs

After virtual routing and forwarding (VRF) networks are discovered and mapped to network views, you can use the VRFs summary to view the complete list of VRF instances throughout the managed network. You can sort the VRF information by any data column to see the relationships between VRF instances in virtual networks.

To view the complete list of VRF instances, click the View all VRFs link at the top of the list. By default, the VRFs are listed by VRF name. Data columns include the following:

• VRF Name: Displays the name of the VRF instance.
• VRF Description: Displays a description if the VRF instance is configured with a description on the device.
• Route Distinguisher: VRFs use route distinguishers to distinguish one set of routes (one VRF) from another. The route distinguisher is a unique number pre-pended to each route within a VRF to identify it as belonging to that particular VRF. The discovered route distinguisher value is listed here if a virtual network instance uses this value. For more information, see Summarizing Route Targets.
• Device Name: The discovered name of the device hosting the VRF instance.
• IP Address: The IP address of the managed VRF-hosting device. This value is a hotlink to the Device Viewer.
• Network View: The network view of the managed VRF-hosting device. This value is a hotlink to the Network Viewer window.
• VRF Network View: The network view to which the VRF is assigned. This value is a hotlink to the Network Viewer window. Note that this value may differ from the Network View identifier.

If you have a significant number of virtual routing and forwarding networks, you can apply a filter by clicking the Filters button at the top of the table, choosing the VRF Name option from the Select a New Field selector, and entering the name of the VRF. You can also filter by network view in the same way, or combine the two filters to isolate all VRF instances in a specific network view.