3850 stack

[bluesea2010]

Hi,

I have a  3850 stack switch, there are 5 switches. 

the switch numbers 1,2,3,4,6 

I want to change  6 to 5  , how can I change 

second question, If the stack cable is faulty, there is a possibility for a loop 

Thanks 

[pman]

Switch# switch 6 renumber 5

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. Another way to change the stack member number is by changing the SWITCH_NUMBER environment variable.

Recommends to be done in a maintenance window

about second question:

loop cannot be formed from a faulty stack cable.

When you have a stack of switches, you want to create a loop with the stacking cables. Port 2 on one switch connects to port 1 on the next switch. Continue that until the last switch which will connect back to the first switch.

If one cable is faulty probably nothing will happen to STACK.

[Reza Sharifi]

Hi,

For the first question, you can change it with this command:

switch 6 rename 5

second question, If the stack cable is faulty, there is a possibility for a loop 

No, a bad stacking cable will not cause a loop.

HTH

[bluesea2010]

Hi,

I  had two stacks  .each stack had two switches..it was disconnected and mixed up.

So I don't remember what are the switches in stack 1 and stack 2  as it got mixed .

How to find out which switch where belongs to stacks 1 and  2 ? 

Or  How to add  a switch to stack 1  which was a member of stack 2

Do I need to erase all the configurations?

Switch# Role Mac Address Priority Version State
------------------------------------------------------------
*1 Active 204c.9efc.4f80 13 V05 Ready
5 Member 0000.0000.0000 0 0 Provisioned

Here I want to add a member switch  which was a member of another stack 

Thanks

[Reza Sharifi]

Make sure the stack is connected correctly using "show switch stack-ring speed"

HTH

[bluesea2010]

Hi,

Do I need to enter the command "switch stack-member-number provision"  before adding the switch?

Thanks 

[Reza Sharifi]

Hi,

Yes, before you add the switch to the stack, you need to provision it first.

https://www.cisco.com/c/en/us/td/docs/switches/lan/catalyst3850/software/release/3se/ha_stack_manager/configuration_guide/b_hastck_3se_3850_cg/b_hastck_3se_3850_cg_chapter_010.html#con_1178943

HTH