Hot add stack connection

[kisankagr]

Hello,

We have a three 3850 switch stack connected non-redundant half bandwidth.

Switch #    Port 1        Port 2
-------        ------        ------
1            2            None
2            3            1
3            None        2

We need to connect Switch# 3 to Switch#1 to make the stack redundant and full bandwidth.

Will this be possible do online without any downtime?


Cheers

[sambhaji.banapure1]

Hi,

You need to reboot the switch after stacking configuration to take the effect.

So this is not possible to do online without  downtime.

Thanks

Sam

[pwwiddicombe]

In this particular case, the 3 switches are ALREADY in a stack, so adding the cable will not have any impact, other than permitting normal operation in the event one of the OTHER cables or stack interfaces fail.

[Ganesh Hariharan]

Hello,

Have a look on the below link with standard set of procedure to add or remove switches form stack.

http://www.cisco.com/c/en/us/td/docs/switches/lan/catalyst3850/hardware/installation/guide/b_c3850_hig/b_c3850_hig_chapter_010.html

Hope it Helps..

-GI

Rate if it Helpss

[Richard Bradfield · Accepted solution]

you should be able to connect switch 3 to switch 1 without affecting the rest of the stack. As far as I am aware you don't need to reload the switches

[kisankagr]

Thank you all for the replies, I'm going to try this today

[Sylvain1]

Hi, I have to do the same exact thing, could you tell if it has worked without rebooting your stack?

[Joseph W. Doherty · Accepted solution]

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Posting

I cannot say for the 3850, but I recall the 3750 advised to only connect/disconnect stack cables if one side of the connection (one of the stack members) was powered off.

Also, at least for the 3750, you didn't need to reload the whole stack.