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What Do I Do If CE Series Switches Fail to Set Up a Stack?

Latest reply: Dec 24, 2018 01:29:08 598 1 0 0 0
This post was last edited by sfa at 2018-07-30 12:29.

The common causes of a stack setup failure include incorrect configurations, incorrect connections, and stack ports in Down state.
Perform the following steps after a stack setup failure:

  1. Check whether a stack can be set up between these member switches.

    Run the display device command to view the member switch models and then determine whether a stack can be set up between these switches. If not, replace these switches.

  2. Check whether the stack configuration is correct.

    Run the display stack configuration all command to check whether the stack configuration meets requirements.

    The following uses the display on a CE12800&12800E switch as an example.

    <HUAWEI> display stack configuration all
    Oper : Operation
    Conf : Configuration
    *    : Offline configuration
    Isolated Port: The port is in stack mode, but does not belong to any Stack-Port
    Attribute Configuration:
     MemberID      Domain         Priority       Mode     Enable
    Oper(Conf)   Oper(Conf)      Oper(Conf)   Oper(Conf)   Oper
    1(1)         10(10)          150(150)     MB(MB)       Enable
    Stack-Port Configuration:
    Stack-Port           Member Ports
    Stack-Port1/1        10GE1/1/0/1    10GE1/1/0/2
    In the command output, the Oper(Conf) field indicates the current configuration and next startup configuration.
    • Check whether all member switches use the same stack domain ID. All member switches must use the same stack domain ID. Otherwise, they cannot set up a stack.

      If member switches use different stack domain IDs, run the stack member { member-id | all } domain domain-id command to change their stack domain IDs to the same.

    • (Applicable only to the CE12800&12800E) Check whether all member switches use the same stack connection mode. All member switches must use the same stack connection mode. Otherwise, they cannot set up a stack. MB indicates the default MPU connection mode, and LC indicates the LPU connection mode.

      If member switches use different stack connection modes, run the stack member { member-id | all } link-type { mainboard-direct | linecard-direct } command to change their stack connection modes to the same.

    • (Applicable only to the CE12800&12800E) Check whether the stacking function has been enabled on member switches. Member switches must have the stacking function enabled to set up a stack. Enable indicates that the stacking function is enabled, and Disableindicates that the stacking function is disabled.

      If member switches have the stacking function disabled, run the stack enable command to enable this function.

    • Check whether member switches have offline configuration. The configuration marked with an asterisk (*) is offline configuration. If offline configuration exists, you must delete it. This is because offline configuration may case a stack configuration conflict, which will cause a failure to set up a stack.

  3. Check whether stack connections are correct.

    Check whether stack connections are consistent with the plan and configuration.

  4. Check whether ports used for stack connections are Up.

    Run the display interface brief command to check whether the ports used for stack connections are physically up, including stack member ports and SIP ports (applicable only to the CE12800&12800E). If these ports are physically Down, check whether optical modules and fibers are faulty.

    In V100R005C00 and later versions, you can also run the display stack link-state last-down-reason command to check the reason why the stack link protocol becomes Down. The reason includes incorrect configuration or cable connection.

  5. Check stack failure event information.

    Run the display stack troubleshooting command to check whether stack failure events occur. This command can record some failures occurring during a stack setup, including configuration errors and connection errors. Troubleshoot these failures according to failure event description.
    <HUAWEI> display stack troubleshooting
    Total :1      
    Seq  Time                     Event Description
    1    2018-07-30 12:29.889  The devices belong to different stack domains, 
                                        and stack cannot be established. (MemberID = 1, 
                                        DomainID = 10, PeerMemberID = 2, PeerDomainID = 20) 
  6. Collect the following information and contact technical support personnel.

    • Results of the preceding troubleshooting procedure.
    • Configuration file, logs, and diagnostic logs.
  • x
  • convention:

Created Dec 24, 2018 01:29:08

Very helpful
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  • x
  • convention:


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