Symptom

• The optical fiber is abnormal, but the associated alarm on the U2000 is cleared.
• When the associated physical port on the NE recovers, the alarm on the U2000 is not cleared.

http://localhost:7890/pages/OMC/01/OMC/01/resources/public_sys-resources/icon-note.gif NOTE:

This case applies only to routers and switches.

Cause Analysis

Huawei OSS is not selected when the user configures a sequence number mode on the U2000, or the private-netmanager attribute is not configured for alarms sent on the NE side. As a result, the U2000 server time when the U2000 receives trap packets from NEs, not the actual alarm generation time on NEs, is recorded as the NE alarm generation time on the U2000.

Procedure

http://localhost:7890/pages/OMC/01/OMC/01/resources/public_sys-resources/icon-note.gif NOTE:

Simple Network Management Protocol version 3 (SNMPv3) is more secure than SNMPv1 and SNMPv2c. Using SNMPv3 is recommended.

• Configuration on the U2000

  1. Right-click the NE in the Main Topology and choose NE Explorer from the shortcut menu.
  2. Choose System Management > NE Channel Management > Trap Service from the service tree.
  3. On the Trap Service tab page, click Synchronize to synchronize alarms from the NE.
  4. Right-click and choose Create from the shortcut menu. In the dialog box that is displayed, set the associated parameters and click Huawei OSS and Extended VB.
     
     http://localhost:7890/pages/OMC/01/OMC/01/resources/tb/ip/images/reliability_flow_01.png
     
  5. Click OK.
• Configuration on the NE
  1. Run the following command to access the system view:

     system-view

  2. Run the following command to start the SNMP agent:

     snmp-agent

  3. Run the following command to add the private-netmanager option to the destination host of the NE:

     snmp-agent target-host trap address udp-domain X.X.X.X params securityname privacy v3 private-netmanager

     http://localhost:7890/pages/OMC/01/OMC/01/resources/public_sys-resources/icon-note.gif NOTE:

     X.X.X.X specifies the IP address of the destination host. Here, set it to the IP address of the U2000 server.

     If the SNMPv3 protocol is not used, add cipher next to the securityname. SNMPv3 is recommended because it is more secure.