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Occasional Contributor I

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

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

MVP Guru

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

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


ACMP, ACSA, ACDX #985
If my post addresses your query, give kudos:)
MVP Expert

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

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).

Occasional Contributor I

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

Replacing the commander with New Switch.

Contributor I

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

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

Mathias Troncoso-Aballay
ACMP, ACCP, ACSA | Aruba Partner Ambassador
MVP Expert

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

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)

 

 

 



Matt Fern
Technical Marketing Engineer, Wired Intelligent Edge

Aruba, a Hewlett Packard Enterprise company

8000 FOOTHILLS BLVD  |  ROSEVILLE, CA 95747
T: 916.540.1759  |  E: mfern@hpe.com   |   Matt @ Twitter
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