We create alarms on U2000 many times the status was disconnect and then clear the alarm, it was OK.
But now U2000 is not clearing the alarm successfully.
a. For VlanIf 107 , VLAN 107 is regarded to port Gigabitethernet 0/0/7,the alarm on Gigabitethernet 0/0/7 was cleared ,
but for vlanif 107 was not.
b. I checked the status of the interface vlanif 107 on device and it is UP.
On the device there is no any alarm information,but on U2000 we can see the alarms doesn't clear
1.On server :click " NE channel MANAGEMENT" and select "alarm service label", make sure the "private-netmanager" option is “YES”.
2.On device: configure "snmp-agent target-host trap address udp-domain ip-address params securityname public v2c private-netmanager ". This will make sure the trap message were sent to the server reliably.
Trap message uses UDP and there is no reliable mechanism to ensure it can be received by U2000 server. If the trap message get lost ,the U2000 server cannot synchronize the device alarms.
Because the trap message is not so reliable ,if it get lost because of some reason ,the server cannot synchronize the alarm status of device. We advise to use the "private-netmanager“ function to make it sent reliably.