Network management and NE have configured the correct SNMP parameter and can ping passably to NE, Network management can't receive the NE Trap message, or network management received Trap message but do not deal with, can't become NE alarm information.
Method 1: configure Trap parameter again in the NE, and the specific information please refer web management can’t receive NE alarm.
Method 2: recreate NE.
A Delete the NE in the network management.
1. In the topology view select this NE.
2. In the main menu bar, select "edit > delete".
3. In the "ok" dialog box, click "yes".
4. In the "delete object result" dialog box, click "close".
B To add the NE again, to ensure the NE management address is the Trap message source address.
1. In the main menu bar, select “file > new > NE".
2. In the "create NE" dialog box, configure the NE each parameter.
3. Click "ok" or "apply".
4. System begin to load NE data, in "prompt" dialog box, click the "ok".
5. Click "cancel", and close the dialog box.
Because the source address of the NE Trap message is different to the management address of the NE network management.