This article describes the SNMPv3 access requirements for collecting complete inventory data from Cisco switches and other network devices. Restricting access to a few MIBs will result in only partial information being gathered.
To ensure full inventory collection, SNMPv3 read-only credentials must allow access beyond the core system MIBs. Limiting permissions to only IF-MIB, IP-MIB, ENTITY-MIB, and SYSTEM-MIB will produce only basic data such as generic hostnames.
Recommended standard MIBs to include
- IF-MIB — Interface details
- IP-MIB — IP address information
- ENTITY-MIB — Physical entity details
- SYSTEM-MIB — System-level information
- HOST-RESOURCES-MIB — CPU, memory, and storage data
- TCP-MIB — TCP connection details
- UCD-SNMP-MIB / UCD-DISKIO-MIB — Disk I/O and performance metrics
MIB compatibility considerations
- Some older MIB names may be deprecated on newer Cisco devices.
- Confirm supported MIBs with your network team or refer to device documentation. While these MIBs are standard and generally available, support can vary by device model and firmware version.
- Ensure that the appropriate MIBs are enabled before running discovery tools.
After granting SNMPv3 access to all required MIBs, the discovery tool will collect complete inventory data, including accurate hostname, hardware details, and performance metrics.
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