You need to redesign your NMS system so that it can collect information without causing adverse effects in the network, such as high CPU utilization on network devices and network instability. Which t

Associating SNMP community strings with an ACL is a security control that limits which hosts can poll, but it does not reduce the CPU burden on devices when the trusted NMS itself sends high-frequency or bulk polling requests.

Unloading unused MIBs from network devices affects what object definitions are locally accessible but does not stop the NMS from sending SNMP requests, so devices still must process and respond to incoming queries.

Restricting polling of large SNMP tables (such as routing, ARP, or interface tables) via OID restrictions prevents bulk walks that generate resource-intensive processing spikes on network device CPUs during polling cycles.

Disabling unused OIDs and MIBs on the NMS prevents it from sending queries for data it does not require, directly reducing the volume of SNMP GET requests transmitted to network devices and lowering their response processing overhead.