add swich to stack (cisco 3750)

I want to add 2 switches to my stack of 2.
Switch 1 is the top switch in rack and has a priority of 15
Switch 2 the is second switch in rack and has priority of 14
How can I configure the stack (provision configuration) so that the 3rd switch  in rack will get switch number 3 and the 4th switch in rack gets number 4
All swiches are exact same module
jacksch4820Asked:
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LibipappachenCommented:
Hi,

     Just do one-by-one method with following configuration only from the stack master.

Switch(config)# switch 3 provision switch_PID - put your 3rd switch into stack.

Verify the status of the provisioned switch. For stack-member-number, enter the same number as in Step 1.

Switch(config)# switch 4 provision switch_PID - put your 4th switch into stack.

Verify and save the config.

Note - switch_PID:
For type, enter the model number of a supported switch that is listed in the command-line help strings.


BR,
Libi
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anoopkmrCommented:
change the stack member number by using the switch <current-stack-member-number>  renumber <new-stack-member-number> global configuration command,

show swithc will show the current swithc number and priority
  3750-Stk>show switch
                                                   Current
    Switch#  Role      Mac Address     Priority     State
    --------------------------------------------------------
     1       Slave     0016.4748.dc80     1         Ready
    *2       Master    0016.9d59.db00     5         Ready

the new number goes into effect after that stack member resets (or after you use the reload slot stack-member-number privileged EXEC command) and only if that number is not already assigned to any other members in the stack.




A higher priority value for a stack member increases its likelihood to be elected stack master and to retain its stack member number. The priority value can be 1 to 15. The default priority value is 1. You can display the stack member priority value with the show switch user EXEC mode command.

    3750-Stk>show switch
                                                   Current
    Switch#  Role      Mac Address     Priority     State
    --------------------------------------------------------
     1       Slave     0016.4748.dc80     1         Ready
    *2       Master    0016.9d59.db00     5         Ready

Cisco recommends that you assign the highest priority value to the switch that you prefer to be the stack master. This ensures that the switch is re-elected as stack master if a re-election occurs.

How do you change the priority value?

    From the global configuration mode, issue the command switch stack-member-number priority new-priority-value .

    From the bootloader switch: prompt, issue the command set SWITCH_PRIORITY new-priority-value .

Even though the priority value applies immediately to the member, it will not affect the status of the current stack master. New priority value will play a role in the next stack-master election.


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jacksch4820Author Commented:
@ anoopkmr
So basically I provision the number I want to use on the stack master and name the standalone switch this number and when I add switch to stack it will get this number
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anoopkmrCommented:
you have to join the new swith to the  Stack and then  renumber it .
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jacksch4820Author Commented:
but you get the command provision so you can pre configure your setup
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anoopkmrCommented:
I have never tried like this  ,, but

A new, out-of-the-box switch (one that has not joined a switch stack or has not been manually assigned a stack member number) ships with a default stack member number of 1. When it joins a switch stack, its default stack member number changes to the lowest available member number in the stack.

so you can  try  preconfigure  the existing Stack   like below
switch 1  renumber 3
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Craig BeckCommented:
You just want to add two switches, right?  You don't need to renumber anything!

Connect the 3rd switch to the stack and power it up.  When it's fully booted just connect the 4th switch to the stack.

If you want to set the priority for each switch so they stay in that order permanently just use the following commands after both switches are fully booted...

switch 3 priority 13
switch 4 priority 12
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jacksch4820Author Commented:
yes correct craigbeck so basically the switch will get lowest available number and will the switch retain its number when I number it before please advice.
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Craig BeckCommented:
Yes the switches will retain their numbers even if you set different priorities.

The priority sets which switch in the stack becomes the master.  The number is just that - the number of the switch in the stack.  Once it's set the number won't change unless you change it in the config.
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LibipappachenCommented:
Thanks
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