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You can define basic discovery settings during system setup (discussed in detail in Running the Setup Wizard), or manually perform discovery using a series of straightforward steps. The following section Discovery with a New NetMRI Deployment describes how to manually configure and run discovery.
If you are migrating your NetMRI platform to the current release, see Discovery with an Existing NetMRI Platform.
Running Network Discovery
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- Identify the VRFs/virtual networks you want NetMRI to access and manage.
- Identify the single VRF-aware Switch/Router on the managed network, that is aware of all of the desired VRFs. NetMRI will need to access the VRFs through this device.
- A VRF-aware device may not exist on the network that is aware of all of the VRFs. If it is not possible to consolidate all VRFs into a single-trunked port, you can physically connect NetMRI to multiple places on the network. NetMRI has up to 3 physical scan interfaces available, labeled MGMT, LAN1, and LAN2, that may differ slightly per platform. For more information, see Configuring Scan Interfaces.
- You also must identify a minimal set of VRF-Aware devices that collectively are aware of all the VRFs you wish NetMRI to manage.
- Reserve a valid routable IP address on each VRF. These IPs will be configured on NetMRI virtual scan interfaces that will connect to each virtual network. Prepare an IP, subnet mask, and gateway for each VRF.
- You must configure at least one network device to provide access to the virtual networks for NetMRI. NetMRI can connect to multiple VRFs on the same physical interface, using virtual scan interfaces, each associated with an encapsulated 802.1q tag. To access each VRF, complete the following:
- The interface NetMRI connects to, should be configured to transport via an 802.1q encapsulated traffic (trunked port).
- Each tag carried by the trunked port should be associated with a single VRF on the device.
- If the device NetMRI is connected to is not VRF aware, and then the 802.1q configurations will be in the form of VLANs, with one VLAN for each VRF. In this case, the device must trunk the VLANs to another device that is VRF aware , and can be configured to associate each 802.1q tag to a VRF.
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Enabling the discovery of Cisco ACI devices provides visibility into your Cisco ACI infrastructure. This allows you to view and manage discovered IP addresses of Cisco ACI fabric members such as APIC controllers and fabric switches with their attached end points.
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To refresh discovery for a single device, or force discovery for a single device, perform the following:Anchor
In the Device Viewer –> Settings & Status –> Management Status -> Discover Now. A pop-up dialog appears, displaying the command-line and SNMP directives that NetMRI immediately sends to the selected device. NetMRI executes the processes required against the device to complete discovery. These include SNMP credential collection, SNMP data collection, device group assignment, and CLI credential collection. Scroll through this listing to view specific details on what types of information are being obtained by NetMRI for the selected device. Some time may be required to finish the process.
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To view discovery status for any device, open the Device Viewer by navigating to Network Explorer -> Discovery and clicking a device link, or Device Viewer -> Settings & Status –> Management Status. You will see the Management Status for the device. This is an important block of information that immediately describes the effectiveness of communications to the device by NetMRI.
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