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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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Huawei uses machine translation combined with human proofreading to translate this document to different languages in order to help you better understand the content of this document. Note: Even the most advanced machine translation cannot match the quality of professional translators. Huawei shall not bear any responsibility for translation accuracy and it is recommended that you refer to the English document (a link for which has been provided).
Troubleshooting Procedure

Troubleshooting Procedure

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 that multicast is enabled on the device.

    Run the display current-configuration command on the device that is directly connected to hosts to check the current configurations of the device.

    • If the command output does not contain multicast routing-enable, run the multicast routing-enable command in the system view to enable multicast on the device first and then complete other IGMP configurations. For details, see the Huawei AR100&AR120&AR150&AR160&AR200&AR1200&AR2200&AR3200&AR3600 Series Enterprise Routers Configuration Guide - Multicast.

    • If multicast has been enabled on the device, go to Step 2.

  2. Check that the interface status is Up.

    Run the display interface interface-type interface-number command on the device to check configurations of the interface directly connected with the network segment of the hosts.

    • If the command output contains interface-type interface-number current state: DOWN, it indicates that the interface is physically Down. Then you need to check the networking and ensure that the interface is properly connected.

    • If the command output contains Line protocol current state : DOWN, it indicates that the protocol status of the interface is Down. Then you need to perform the following operations:
      • Check whether the interface is in shutdown state.

        Run the display current-configuration interface interface-type interface-number command to check the current configurations of the interface. If the command output contains shutdown, run the undo shutdown command in the interface view.

      • Check whether an IP address is configured for the interface.

        Run the display current-configuration interface interface-type interface-number command to check the IP address of the interface. If no IP address is configured for the interface or the configured IP address is on a different network segment from the hosts, run the ip address ip-address { mask | mask-length } to reconfigure an IP address for the interface and ensure that the IP address is on the same network segment with those of the hosts.

    • If the interface status is Up, go to Step 3.

  3. Check that IGMP is enabled on the interface.

    Run the display current-configuration interface interface-type interface-number command to check the current configurations of the interface that is directly connected with the hosts.

    • If the command output does not contain igmp enable, it indicates that IGMP is not enabled on the interface. Run the igmp enable command in the interface view to enable IGMP.

    • If IGMP has been enabled on the interface, go to Step 4.

  4. Check whether the multicast group G of the EXCLUDE message is in the SSM group address range.

    Run the display current-configuration configuration pim command on the device that is directly connected to the hosts to check the current configurations in the PIM view. If the command output contains ssm-policy basic-acl-number or ssm-policy acl-name, it indicates that the SSM group address range is defined on the device. Then, run the display acl { acl-number | name acl-name } command to check the ACL configurations.

    • If the command output shows that the multicast group G is in the address range permitted by the ACL, it indicates that G belongs to the SSM group address range. Ensure that IGMPv3 is running between the host and the interface of the device.

      If the version of IGMP running on the host cannot be upgraded, you need to enable SSM mapping on the interface of the device and create static SSM mapping rules for G.

    • If the command output shows that the multicast group G is in the address range denied by the ACL, it indicates that G belongs to the ASM group address range. Then, you need to adjust the group address range specified in the ACL so that G is in the address range permitted by the ACL.

    • If the multicast group G is not in the SSM address range and the configured IGMP version is correct, go to Step 5.

  5. Check whether the range of groups that the hosts cannot join is limited on the interface.

    Run the display igmp interface interface-type interface-number command to check the current configurations of the interface that is directly connected with the hosts.

    • If the group-policy field in the command output is not none, it indicates that the range of groups the hosts can join is limited on the interface. IGMP then filters Report or Join messages of the hosts according to the ACL. Check the range of the groups permitted by the ACL. If the multicast group G is not in this range, modify the ACL or delete the ACL configuration to ensure that IGMP can serve members of G.

    • If the range of groups that the hosts can join is not limited on the interface, go to Step 6.

  6. Check whether the maximum number of IGMP group memberships is limited on the interface.

    Run the display igmp interface interface-type interface-number command to check the current configurations of the interface that is directly connected with the hosts.

    • If the IGMP limit field in the command output does not display -, it indicates that the maximum number of IGMP group memberships is limited on the interface. Then, run the igmp limit number command to increase the IGMP limit, or run the undo igmp limit command to delete the configured IGMP limit.

    • If the IGMP limit field in the command output displays -, go to Step 7.

  7. Check whether the maximum number of IGMP group memberships is limited in the current instance.

    Run the display current-configuration configuration igmp command to check the configurations of the IGMP limit in the current instance.

    • If the command output contains the configurations of the IGMP limit for the instance, it indicates that the maximum number of IGMP group memberships is limited in this instance. Then, run the limit number command in the IGMP view of the instance to increase the IGMP limit, or run the undo limit command in the IGMP view of the instance to delete the configured IGMP limit.

    • If the command output does not contain the configurations of the IGMP limit for the instance, go to Step 8.

  8. Check whether the maximum number of IGMP group memberships is limited globally.

    Run the display current-configuration | include igmp global limit command to check the global configurations of the IGMP limit.

    • If there is command output, it indicates that the maximum number of IGMP or MLD group memberships is limited globally. Then, run the igmp global limit number command in the system view to increase the IGMP limit, or run the undo igmp global limit command in the system view to delete the set IGMP limit.

    • If there is no command output, go to Step 9.

  9. Check that the number of entries and number of interfaces are below the upper limit defined in the product license.
    • If the number of entries and number of interfaces exceed the upper limit allowed by the product, re-plan network deployment.

    • If the fault persists after the preceding troubleshooting procedures are complete, go to Step 10.

  10. 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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