Adding an additional switch to a stack

switch model: Aruba 2920 48G POE+

Adding to a stack which already has 3 switches. Is it just a matter of reordering the stacking cables or is additional config required?
Technical InformationAsked:
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atlas_shudderedSr. Network EngineerCommented:
There are a few things that you need to confirm and configure prior to installing the new switch.  Also, it is best if you perform this process during a maintenance window as reboots may be necessary and there is a risk of hardware failure.

1.  Pull current running and startup configs from existing stack.
2.  Confirm the switch priorities in the current stack.  Make sure that your master switch is set to priority 15 and all other current switches are set to a priority less than 15 ( I generally decrease each additional switch by 2 - e.g. Master 15, Switch 2 - 13, Switch 3 - 11, etc.)
conf t
switch X priority Y
(example: switch 1 priority 15)

Open in new window

3.  Power on the new switch apart from the stack and confirm the IOS version and package installed to the switch matches that of the stack.  If it does not, load the appropriate IOS to the switch and confirm that it boots to that image.  Don't rely on the stack to perform smart upgrade.  It is always a crap shoot and generally works out badly for the installer.
4.  Once the IOS is installed, configure the new switch's stack priority.  Same configuration as above.
5.  Rack the new switch and power it on.
6.  Cable the new switch into the stack via smartstack cabling.
It will take 5-10 minutes for the new switch to be recognized and be introduced to the existing stack.  If memory serves the new switch will go through 1-2 reboots during this period.
Technical InformationAuthor Commented:
Thanks so much
There is a small issue that requested stacking is for Aruba switch, not Cisco.
Aruba J972xA 2920-48G-PoE+ switch stacking.

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Technical InformationAuthor Commented:
@Predrag yes you are correct! Thanks
atlas_shudderedSr. Network EngineerCommented:
Ahhhh crap - I saw the 29xx and completely blew right past the rest of that.  Sorry about that.  Never support distracted.....
Technical InformationAuthor Commented:
No problem dude, now I know how to do it for both!

Awesome work guys
atlas_shudderedSr. Network EngineerCommented:
disappeared requestor
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