Guidelines and Limitations for SNMP
We recommend that you do not have the SNMP management station in the subnet of dynamic interface or service port of the controller.
If the SNMP management station subnet is the same as that of the dynamic interface, we recommend that you set the SNMP queries to the IP address of the dynamic interface of the controller. Similarly, if the SNMP management station subnet is the same as that of the service port, we recommend that you set the SNMP queries to the IP address of the service port of the controller.
Controller has a limitation where, even if the queries are made to the management IP address, SNMP response packets are sent with the source IP address as the dynamic interface or the service port respectively. For more information, see CSCvk38081.
To avoid AP data mismatch, we recommend retrieving the AP-related details sent to Cisco Catalyst Center (earlier known as Cisco DNA Center) from the controller only after all the APs are in Run state.
The controller may fail to sync traps with the configured trap receiver when the AP register SNMP trap is enabled on the controller. The SNMP trap is limited to 1024 message queue size, and the controller might get overwhelmed with the huge number of traps during the AP association/disassociation situation. The workaround is to clear the older trap entries on the controller using the clear traplog command.