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You manage data collection settings through Device Group configuration (see Creating Device Groups for information about group settings for data collection). For example, a simple Cisco router does not support VLANs, and its listing shows No under the Supported column, and a Last Collected: Never message in the Value column. In this case, NetMRI will not attempt to collect VLAN data as the device is not classified as a Switch. When NetMRI encounters a device that it classifies as a Switch but hasn't previously supported, the system will attempt VLAN data collection from the device. The Supported column will reflect No but the Last Collected value may reflect that data collection was possible.
Device credentials are a critical element in ensuring the management of a device. You can add SNMP and CLI credentials to any individual discovered device. For more information, see Adding and Testing SNMP Credentials for a Device and Adding and Testing CLI Credentials for a Device.