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Alarm Handling

S600-E V200R010C00

This document provides the explanations, causes, and recommended actions of alarms on the product.
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OSPF_1.3.6.1.2.1.14.16.2.17 ospfNSSATranslatorStatusChange

OSPF_1.3.6.1.2.1.14.16.2.17 ospfNSSATranslatorStatusChange

Description

OSPF/2/NSSATRANCHG:OID [oid]: The status of the NSSA translator changes. (AreaId=[area-id], ProcessId=[process-id], RouterId=[router-id], NSSATranslatorState=[translator-state], InstanceName=[instance-name])

The translator role in the NSSA changed. A possible cause is that the status of the translator changed among Enabled, Elected, and Disabled.

Attribute

Alarm ID Alarm Severity Alarm Type
1.3.6.1.2.1.14.16.2.17 Major environmentalAlarm (6)

Parameters

Name Meaning

oid

Indicates the MIB object ID of the alarm.

AreaId

Indicates the area ID of the NSSA.

ProcessId

Indicates the process ID.

RouterId

Indicates the ID of the switch that generates the trap.

NSSATranslatorState

Indicates the new status of the translator in the NSSA.
  • 1: ENABLED
  • 2: ELECTED
  • 3: DISABLED

InstanceName

Indicates the instance name.

Impact on the System

ASE routes may flap for a short period in the following situations. The role of the NSSA ABR changes; the Type 5 LSAs translated from Type 7 LSAs need to be flushed; or a new translator is translating Type 7 LSAs to Type 5 LSAs. Moreover, the translator role changes without manual configuration mostly because the topology in the backbone area or the NSSA changes.

Possible Causes

1. The parameter translator-always in the nssa command was manually configured or canceled on an ABR in the NSSA.

2. A new router ID was configured on an ABR in the NSSA and took effect.

3. A new switch joined the NSSA or a switch exited from the NSSA.

4. The OSPF protocol was restarted or the master/slave switchover was performed on a switch in the backbone area or the NSSA. This caused topology change in the NSSA.

5. The nssa command was manually configured or parameters in the nssa command were manually modified, which caused topology flapping in the backbone area or the NSSA. For example, configuring or canceling the parameter no-summary or no-import-route in the nssa command will lead to the reestablishment of the neighbor relationship between the local switch and a switch in the backbone area and between the local switch and a switch in the NSSA.

6. The role of the local switch changed to ABR or changed from ABR.

7. The topology of the backbone area or the NSSA changed. As a result, the local switch cannot reach another ABR with a greater router ID or with the parameter translator-always from the backbone area or the NSSA.

Procedure

  1. If the nssa translator-always command is configured or canceled manually on the local switch, run the display ospf brief command to check whether the translator role of the local switch in the NSSA is correct.

    • If the nssa translator-always command is configured, run the display ospf brief command to check whether the status of the NSSA translator is always. If so, go to Step 8. If not, go to Step 7.

    • If the configuration about nssa translator-always is canceled, run the display ospf brief command to check the status of the NSSA translator. If the status is disabled, go to Step 2. If the status is elected, go to Step 8.

  2. A possible cause is that the nssa translator-always command is configured on an ABR in the NSSA. You can run the display ospf lsdb router command to check whether the Router-LSA of some ABR in the NSSA contains the Nt bit. Alternatively, you can check whether the nssa translator-always is configured on the ABRs.

    • If the Router-LSA of some ABR contains the Nt bit or an ABR has been configured with the nssa translator-always command, go to Step 8.

    • If there is no ABR whose Router-LSA contains the Nt bit or no ABR is configured with the nssa translator-always command, go to Step 3.

  3. If a new router ID is configured on the local switch and already takes effect, check whether the translator role of the local switch in the NSSA is correct after the topology in the area becomes stable.

    • If so, go to Step 8.

    • If not, go to Step 4.

  4. A possible cause is that a new router ID is configured on an ABR in the NSSA. In this case, check the configurations of the other ABRs.

    • If the router ID of an ABR is changed, check whether the newly configured router ID is greater than the local router ID after the topology in the NSSA is stable.
      • If so, go to Step 8.

      • If not, go to Step 5.

    • If the router ID of an ABR remains unchanged, go to Step 5.

  5. If a new switch joins the NSSA, do as follows as required:

    • If the new joint switch is an ABR, check whether the router ID of the ABR is greater than the local router ID after the topology in the NSSA is stable.
      • If so, go to Step 8.

      • If not, go to Step 6.

    • If the new joint switch is not an ABR, go to Step 6.

  6. Check whether the local switch and the neighboring switch have traps , 1.3.6.1.2.1.14.16.2.2, , and 1.3.6.1.2.1.14.16.2.16.

    • If the preceding traps are generated, refer to the corresponding fault location processes.
    • If the preceding traps are not generated, go to Step 7.

  7. Collect alarm information and configuration information, and then contact technical support personnel.
  8. End.

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Updated: 2019-04-18

Document ID: EDOC1000141873

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