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How to replace a master switch in a 3810m stack?

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  • 1.  How to replace a master switch in a 3810m stack?

    Posted May 28, 2019 10:24 AM

    How can i replace the Commander in Aruba 3810m stack?

    Mbr
    ID Mac Address Model Pri Status
    --- ----------------- ------------------------------------- --- ---------------
    1 20XXXX-75bXXX Aruba JL075A 3810M-16SFP+-2-slot S... 254 Standby
    2 20XXXX-763XXX Aruba JL075A 3810M-16SFP+-2-slot S... 255 Commander



  • 2.  RE: How to replace a master switch in a 3810m stack?

    MVP EXPERT
    Posted May 28, 2019 10:42 AM

    Do you want to promote the Standby to the Commander? If so:

     

    Removing the Commander

    1. Establish a console session with the stack using a direct console cable connection, telnet or equivalent. If using the console cable, connect it to a switch other than the Commander

    2. Enter the following command to force Commander status over to the Standby switch:

      HP Stack 2920(config)#: redundancy switchover

      This causes the Standby switch to take the role of the Commander and for a new Standby to be selected from the remaining member switches. The former Commander becomes a Member of the stack.

    3. To remove the former Commander from the stack:

      HP Stack 2920(config)#: stacking member <n> remove

      where n is the member number of the former Commander.

    4. Power down the removed switch.

    5. Disconnect the stacking cables from the removed switch and from the other switches in the stack.

    Taken from :

     

    http://h22208.www2.hpe.com/eginfolib/networking/docs/switches/WB/15-18/5998-8156_wb_2926_atmg/content/ch06s02.html



  • 3.  RE: How to replace a master switch in a 3810m stack?

    MVP GURU
    Posted May 28, 2019 10:43 AM

    Replacing the Commander with what? ...with the very same Switch model (with the very same SKU) or with another Switch model (with different SKU)? those are relevant details.

     

    I suggest you to read the Aruba Backplane Stacking and VSF Best Practice on ArubaOS-Switch Technical White Paper (16.08) especially the "Backplane Stack Maintenance and Troubleshooting" Chapter (particularly "Removing a Stack Member" at page 6).



  • 4.  RE: How to replace a master switch in a 3810m stack?

    Posted May 28, 2019 11:45 AM

    Replacing the commander with New Switch.



  • 5.  RE: How to replace a master switch in a 3810m stack?

    Posted May 28, 2019 12:36 PM

    Try to change the priority 

    HP Switch(config)# stacking member * priority *****

     

    and after that do the redundancy switch over

     

    HP Stack 2920(config)#: redundancy switchover



  • 6.  RE: How to replace a master switch in a 3810m stack?
    Best Answer

    EMPLOYEE
    Posted May 28, 2019 02:42 PM
      |   view attached

    Greetings!

     

    My recommendation would be to follow procedures in the guide attached to this post.

     

    First, manually trigger a failover to the Standby:

     

    • Forcing a Commander failover (page 6)

    Next, if the Commander will be replaced with the same part:

     

    • Replacing a stack member (page 7)

    Alternatively, if the Commander will be replaced with a different part:

     

    • Removing a stack member (page 6)
    • Replacing a stack member (page 7)

     

     

     

    Attachment(s)

    pdf
    Backplane Stacking and VSF Best Practices.pdf   600 KB 1 version