On NE NIZWA-PE-1 interface goes down and came up . As per NE logbuffer we are able to see the interface status came up and associated tunnel aslo came up but same things is not schronized with U2000 server. U2000 still showing that Tunnel interfaces are down.
1. open NE Explorer, "Service Tree->NE Channel Management->Trap Service", then click "Synchronize"
2. find the U2000 server IP address, and delete it.
3. then "Create"
(1). config the Alarm Mode to "Inform"
(2). Enable Alarm Log in NE
"Service Tree->NE Channel Management->Trap Service", then click "Advacnced"
the below two points can not be configured in U2000, but should pay attention, or there will be error when synchronize.
1.equipment should be added by SNMP V2，this function do not support SNMP V1
2.the max size of SNMP packet should be less than 12000
[NE80E]disp current-configuration | inc snmp-agent packet
snmp-agent packet max-size 12000
after enableing the above steps on the U2000 the problem was not solved due to the NE80E version is V3R3C02, this version do not support inform mode alarm report, and do not support alarm sychronization , rnd said V6R1 support Inform mode and sychronization .
the solution for this issue was to do the following configuration on the NE8E , then we do not need to configure on U2000.
[NE80E]snmp-agent notification-log enable.
The reason of the problem is that the alarm was lost when equipment send information to U2000. In U2000V1R1, we can set Alarm Mode to "Inform" to avoid the problem.
After enable notification-log, the problem can be solved in the future. But for the previous alarm which can not disappear, we have to clear it manually.