# Running NMS SNMP

Ensure that the following conditions apply to run SNMP after it is installed:

Condition | Description
All Natural Access environment variables must be properly set | To learn about Natural Access environment variables, refer to the Natural Access Developer's Reference Manual
The DTM service must be specified in the cta.cfg file | By default, the DTM service is specified in cta.cfg. Refer to the Natural Access Developer's Reference Manual for more information about cta.cfg. Refer to the Digital Trunk Monitor Service Developer's Reference Manual for information about DTM.
The Natural Access Server (ctdaemon ) must be running. | ctdaemon activates the NMS OAM database. ctdaemon must be running for the NMS SNMP agents to recognize boards and report data to SNMP requests. To verify that ctdaemon is running access a command prompt and enter the ps command, as follows:: ps -A | grep ctdaemon This command produces output similar to the following: 1028 TS 85 pts/3 0:00 ctdaemon Note: The SNMP subagents continue to work whether or not ctdaemon is running. If you restart ctdaemon while a subagent is running, boards are detected (if configured). Refer to the Natural Access installation booklet and to the NMS OAM System User's Manual for more information about starting Natural Access and NMS OAM.