Cisco Switch Stack Configuration - How to add a switch to Live Stack | NO OUTAGE | NO REBOOT NEEDED

If you are a network engineer, you need to know how to add a new switch to an existing stack without causing any network outage. Also, you need to spread out the uplink connection to second switch to reduce the possible outage to the network in case one switch goes down in the stack. This video explains just that.
Note: if you have 4 uplink ports in a switch, port numbering will be like regular access port numbering, which is, odd numbers are on the top row and even numbers are in the bottom row.

[@BestCrazyShow]

In 5:43 the second switch in the stacks seems to have the provision configured by default and the #2 assigned by default. I'm not savvy on the topic, therefore, I look forward to knowing why is that this configuration is defaulted? Is it that when you ask for two switches one of them comes as it?
In my case, I need to stack a 9200L switch to one already on and working. I want to know whether this configuration is expected for the second switch.

[@1mw4tch1ng]

you should have moved the redundant PO to switch port gi2/0/1 and not gi2/0/3 just to make everything consistent even your way will work.

[@networktutor640]

the reason for moving the fiber link ro 2/0/3, they physicall next to each other and make the cabling easier. It also looks nice they are lined up above and below. But you are correct if you want to keep the config next to each other like 1/0/3 and 2/0/3. Thanks a lot fo sharing your thought.

[@evanespinoza7853]

Thank you for the video. My question is: I have a potential 3 switch stack of 2960X's. Currently, two are stacked together via stacking cables in the back, and the third didn't have an expansion slot and now I've found one and installed one in the back. I have the stacking cables prepared to connect to the third switch and unsure of how to proceed.
The first two switches are already connected and configured in the stack, the third is treated as a separate switch. I am trying to add the lone third switch to the existing two switches' stack. Cheers.

[@networktutor640]

See this picture on how to stack 3 switches of 2960x.
www.amazon.com/Cisco-Catalyst-2960-GigE-LAN/dp/B00CIZXFK2
It will join the stack as a blank switch. Issue # sh int status and you will see 3/0/1 - 3/0/x (x- number of ports). Hope this helps bro.

[@abhisheksaxena5406]

Thanks for a great video👍 I got a question if the interfaces have different vlan on switch 1 then how do we copy all the interface config on 2nd switch as after stacking shouldn’t it copy the entire switch 1 config to 2nd switch. Note : the first switch was standalone with existing config on each interface different vlan. Thanks in advance

[@networktutor640]

for example you have 2 switch in a stack and the second switch failed. At this point you will have the first switch running as master/active. If you issue a command # sh switch - you will see your failed switch become as removed. However the master - then you issue a command # sh int status - you will staill see all the ports config including its vlans.
The stack master contains the saved and running configuration files for the switch stack. The configuration files include the system-level settings for the switch stack and the interface-level settings for each stack member. Each stack member has a current copy of these files for back-up purposes.
When you add a blank switch to replace the failed switch, all the configs will be copied over including the interface level config.
Here is the cisco KB - chrome-extension://efaidnbmnnnibpcajpcglclefindmkaj/www.cisco.com/c/en/us/td/docs/switches/lan/catalyst3750/software/release/12-2_40_se/configuration/guide/scg1/swstack.pdf
Let me know you need further clarification.

[@assistofficial9814]

I'm running into a few issues, my main switch that I'm working on can see that it's currenctly being stacked and the main switch is the master and the other one is member. Should ports from the other switch not show up in show run on my main switch?

[@networktutor640]

you should see all the ports config in the running config. Simply issue #sh int status and you should see all the ports available in the master and member switches. If you have issues issue another command #sh version and see the Cisco IOS images matches on both the switches. Remember that all the switches in the stack must have the same IOS version.

[@frankiemonato583]

Question what do you call those otange cables? Is it stack cable?

[@networktutor640]

no. they are multimode fiber optics cables.

[@frankiemonato583]

@@networktutor640 thank yoo

[@shawnphillips1220]

Is this the same process for cisco 9200L?

[@networktutor640]

We only using the 9300 series but looked at how 9200 works. It looks like a regular 3650 stacking. See this cisco video:
th-cam.com/video/tCTJ2gSKZNc/w-d-xo.html.
Also see this cisco site: www.cisco.com/c/en/us/products/collateral/switches/catalyst-9200-series-switches/nb-06-stackwise-architecture-cte-en.html

[@tahersadeghi6773]

Your text screens are hard to read.

[@networktutor640]

sorry about it. point noted.