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NetMRI discovery depends on a collection of under-the-hood features to ensure that polling and addition of devices in the network proceed smoothly and accurately. This chapter describes the three following critical tasks.

• Defining Data Collection and Device Groups: You must define important settings for network polling. This topic involves the processes of data collection and polling of devices across the network, including polling of switched Ethernet devices. The definition of device and interface groups is discussed in other topics later in this Guide. For more information, see Defining Group Data Collection Settings.

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  See Creating Device Groups for information on the Groups tab and its associated functions.

  
  

• ManagingSNMPandCLICredentials: Credentials are a critical component for discovery and Configuration Management. You can define global default values for admin account logins, enable passwords, and also define admin account logins and enable passwords on individual devices. For more information, see  Adding and Editing Device Credentials.
• DebuggingandManagingCollectionResults: When data collection and polling stops for any reason, NetMRI provides methods for determining the cause of the failure and ways to fix it. See Debugging Issues in Discovery and Data Collection and Running Discovery Diagnostics for more information.

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• Config Collection: If enabled, the current NetMRI virtual is able to collect configuration data from network devices using enabled protocols.
• Config Locked: Devices with collected information that show changes during subsequent config collections can be reported as showing "Unauthorized Changes".
• Use Telnet Protocol: NetMRI opens Telnet terminal sessions with devices that support this option and reads the configurations. Individual devices can make use of Telnet login credentials.
• Use SSH Protocol: NetMRI opens SSH terminal sessions with devices that support this option and reads the configurations. Individual devices can make use of SSH login credentials.
• Use HTTP Protocol: NetMRI opens HTTP browser sessions with devices that support this option and reads the configurations. Individual devices can make use of HTTP login credentials.
• Use Vendor Default Credentials: Enables NetMRI to use its library of vendor-default credentials as part of the process of collecting configuration data.

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For additional information about NIOS IPAM Sync, see Overlay/Overwrite Logic

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Configuring IPAM Sync Configuring IPAM Sync

Configuring IPAM Sync

This section describes the following:

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• Network sync: Newly-imported subnets are imported as “managed”.
  • If the imported subnet conflicts with an existing subnet, it is not accepted. The imported subnet can go into a container as long as there is no conflict.
  • If the subnet already exists, no changes are made.
  • If the subnet is in IPAM but not in NetMRI, it is left in IPAM.
• IP address sync: New IP addresses are added and marked as “unmanaged”. If an IP address already exists, the field values are overwritten during the import.
  • Before NetMRI 7.1.4 and NIOS 8.1, if the IP address exists in IPAM but it is not in the import file, it is left in IPAM.
  • As of NetMRI 7.1.4 and NIOS 8.1, if the IP address exists in IPAM but it is not in the import file, its discovered data is cleared out. You can control the time that the IP address stays in the NetMRI database after it is no longer discovered under NetMRI. To do so, go to Setup > General Settings > Advanced Settings.

Viewing IPAM Sync Discovered Data in NetMRI and NIOS

In NIOS, you can view the data discovered by NetMRI and synchronized using IPAM Sync as follows:

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Supporting Cisco Discovery Service Supporting Cisco Discovery Service

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Supporting Cisco Discovery Service

NetMRI automatically supports an Infoblox utility, Cisco Discovery Service, that enables network administrators to provide Cisco-validated reporting and analysis. NetMRI operates as a Cisco Discovery Service-enabled system supporting discovery of network systems for analysis and management. You can use the CDS Integration Tool as part of a new NetMRI installation, or use the tool to extract further insight and value from an existing deployment. Cisco Gold Partner status is required for effective use of the software utility.

NetMRI supports CDS API version 2.0 and uses a NetMRI device or virtual machine to inspect all aspects of a network's Cisco infrastructure to collect the following information:

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