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AR Router Troubleshooting Guide

This Product Documentation provides guidance for maintaining AR Enterprise Router, covering common information collection and fault diagnostic commands, typical fault troubleshooting guide, and troubleshooting.
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The NMS Fails to Receive Trap Messages from the Host

The NMS Fails to Receive Trap Messages from the Host

Common Causes

This fault is commonly caused by one of the following:
  • The trap message is lost.

  • The SNMP configuration on the host is incorrect. As a result, the host is unable to send trap messages.

  • No trap message is generated on the host-side service module, or the trap message is generated on the host-side service module, but the format of the trap messages is incorrect. As a result, the trap message cannot be sent.

Troubleshooting Flowchart

Figure 14-6  Troubleshooting flowchart used when the NMS fails to receive trap messages from the host

Troubleshooting Procedure

Context

NOTE:

Saving the results of each troubleshooting step is recommended. If your troubleshooting fails to correct the fault, you will have a record of your actions to provide Huawei technical support personnel.

Procedure

  1. Check whether the SNMP configurations on the host are correct.

    • If the SNMP configurations are correct, go to Step 2.

    • If the SNMP configurations are incorrect, change the configuration based on the following configuration cases.
      Table 14-2  Typical SNMP configurations

      Configuration Case

      Command

      Configure a destination host running SNMPv2c, with the destination port number being 162 (default value), the security name being huawei, and the IP address being 192.168.1.1.

      <Huawei> system-view
      [Huawei] snmp-agent target-host trap-paramsname abc v2c securityname huawei
      [Huawei] snmp-agent target-host trap-hostname aaa address 192.168.1.1 trap-paramsnam abc
      

      Configure a destination host running SNMPv2c, with the destination port number being 163, the security name being huawei, and the IP address being 192.168.1.1. Trap messages are sent through a VPN network named VPN-Test.

      <Huawei> system-view
      [Huawei] snmp-agent target-host trap-paramsname abc v2c securityname huawei
      [Huawei] snmp-agent target-host trap-hostname aaa address 192.168.1.1 udp-port 163 vpn-instance VPN-TEST trap-paramsname abc
      Configure a destination host running SNMPv3, with the user name being huawei. The user belongs to the user group named huawei_group and has Huawei_view as the notify rights (notify-view).
      NOTE:

      With Huawei_view, the user can access all nodes from the iso subtree.

      # Configure a MIB view.
      <Huawei> system-view
      [Huawei] snmp-agent mib-view Huawei_view include iso
      # Configure a user group.
      [Huawei] snmp-agent group v3 huawei_group noauth read-view Huawei_view write-view Huawei_view notify-view Huawei_view
      # Configure a user.
      [Huawei] snmp-agent usm-user v3 huawei huawei_group
      [Huawei] snmp-agent usm-user v3 huawei group huawei_group
      Configure a destination host running SNMPv3, with the user name being huawei and the IP address being 192.168.1.1.
      NOTE:

      huawei must be an existing user name.

      <Huawei> system-view
      [Huawei] snmp-agent target-host trap-paramsname abc v3 securityname huawei authentication
      [Huawei] snmp-agent target-host trap-hostname aaa address 192.168.1.1 trap-paramsname abc
      
      Configure a destination host running SNMPv3, with the destination port number being 163, the user name being huawei, and the IP address being 192.168.1.1. Trap messages are sent through a VPN network named VPN-Test.
      NOTE:

      huawei must be an existing user name.

      <Huawei> system-view
      [Huawei] snmp-agent target-host trap-paramsname abc v3 securityname huawei authentication
      [Huawei] snmp-agent target-host trap-hostname aaa address 192.168.1.1 udp-port 163 vpn-instance VPN-TEST trap-paramsname abc

  2. Run the display snmp-agent trap all command to check whether the trap function is enabled.

    • If the trap function is not enabled, run the snmp-agent trap enable command to enable the host to send trap messages.

    • If the trap function is enabled, go to Step 3.

  3. Check whether the log message indicating that a specific trap is generated exists on the host.

    • If the log message indicating that a specific trap is generated does not exist on the host, the trap is not generated. Go to Step 4.

    • If the log message indicating that a specific trap is generated exists on the host, the trap has been generated, but the NMS fails to receive the trap message. Go to Step 4.
      NOTE:
      The log message indicating that a specific trap is generated is as follows: #Jun 10 2010 09:55:03 Quideway IFNET/2/IF_PVCDOWN:OID 1.3.6.1.6.3.1.1.5.3 Interface 109 turned into DOWN state.

  4. Collect the following information and contact technical support personnel:

    • Results of the preceding troubleshooting procedure
    • Configuration files, log files, and alarm files of the devices

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Updated: 2019-05-10

Document ID: EDOC1000079719

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