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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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Traffic Policy Fails to Take Effect

Traffic Policy Fails to Take Effect

This section describes the troubleshooting flowchart and provides a step-by-step troubleshooting procedure to use when the traffic policy fails to take effect.

Common Causes

This fault is commonly caused by one of the following:
  • The traffic policy fails to be applied.
  • The traffic policy is applied to an incorrect direction.
  • The packets do not match rules of the traffic classifier in the traffic policy.
  • The traffic behavior associated with the traffic classifier in the traffic policy is configured incorrectly.

Troubleshooting Flowchart

Figure 21-1 shows the troubleshooting flowchart.
Figure 21-1  Troubleshooting flowchart for the ineffective traffic policy

Troubleshooting Procedure

NOTE:

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

Procedure

  1. Check that the traffic policy is applied correctly.

    Run the display traffic-policy applied-record command to check whether a traffic policy is applied:
    • If the value of Policy total applied times is 0, the traffic policy is not applied. Run the traffic-policy command to apply the traffic policy to an interface or a sub-interface.
    • If the value of state is success, check whether the traffic policy is applied to a correct direction. The traffic policy must be applied to the inbound direction if the traffic policy matches packets received by the AR100&AR120&AR150&AR160&AR200&AR1200&AR2200&AR3200&AR3600, and it must be applied to the outbound direction if the traffic policy matches packets sent from the AR100&AR120&AR150&AR160&AR200&AR1200&AR2200&AR3200&AR3600.

      • If the traffic policy is applied to an incorrect direction, run the undo traffic-policy { inbound | outbound } command to unbind the traffic policy, and then run the traffic-policy policy-name { inbound | outbound } command to re-apply the traffic policy to a correct direction.
      • If the traffic policy is applied to a correct direction, go to step 2.
    • If the value of state is fail, the traffic policy fails to be applied. If the traffic policy fails to be applied, the system displays an error message. Run the undo traffic-policy { inbound | outbound } command to unbind the traffic policy, and then run the traffic-policy policy-name { inbound | outbound } command to re-apply the traffic policy. Rectify the fault identified in the error message.

  2. Check whether packets match the rules in the traffic classifier.

    Run the display traffic policy statistics command to check the traffic statistics on an interface to which a traffic policy is applied. If no information is displayed, packets do not match the rules in the traffic classifier.

    NOTE:

    Before viewing the traffic statistics, ensure that the statistic enable command has been used in the traffic behavior view to enable the traffic statistics function.

    • If packets match the rules in the traffic classifier, go to step 4.
    • If packets do not match the rules in the traffic classifier, go to step 3.

  3. Check whether the information in packets matches the rules in the traffic classifier.

    View the information (such as the IP address, MAC address, DSCP priority, VLAN ID, and 802.1p priority) in packets, run the display traffic-policy user-defined command to view the traffic classifier in the traffic policy, and run the display traffic classifier user-defined command to view the rules in the traffic classifier. Check whether the information in packets matches the rules in the traffic classifier.
    • If not, modify the rules to match the information in the packets.
    • If yes, go to step 4.

  4. Check that the traffic behavior associated with the traffic classifier is configured correctly.

    Run the display traffic-policy user-defined policy-name classifier classifier-name command to check whether the traffic behavior associated with the traffic classifier is configured correctly.

    • If not, run the traffic behavior command to enter the traffic behavior view and correctly configure a traffic behavior.
    • If yes, go to step 5.

  5. Collect the following information and contact Huawei technical support personnel.

    • Results of the preceding troubleshooting procedure
    • Configuration file, log file, and alarm file of the AR100&AR120&AR150&AR160&AR200&AR1200&AR2200&AR3200&AR3600

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Updated: 2019-05-10

Document ID: EDOC1000079719

Views: 450408

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