3850 Stack Queries

[avilt]

I have to form a stack with 2 switches. I am aware that stack cable should be crisscrossed.

How about stack power cables? Do I need to follow certain pattern? Whats the significance of color code GREEN/YELLOW on stack port display?

When two switches are powered in a stack using external power and stackpower, how can I selectively shutdown a switch?

Whats the procedure to perform IOS upgrade on stack? Do I need to do it on all the switches?

[balaji.bandi]

How about stack power cables? Do I need to follow certain pattern? Whats the significance of color code GREEN/YELLOW on stack port display?

The cable in the figure connects a switch to another switch in a power stack or with an XPS. StackPower cables have color bands on the cable ends:

• The cable end with the green band can connect only to a switch.

• The cable end with the yellow band can connect to a switch or an XPS.

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

When two switches are powered in a stack using external power and stackpower, how can I selectively shutdown a switch?

Depends on how you configure, how you want to be powered

https://www.cisco.com/c/en/us/td/docs/switches/lan/catalyst3850/software/release/16-6/configuration_guide/int_and_hw/b_166_int_and_hw_3850_cg/b_166_int_and_hw_3850_cg_chapter_0111.html

Whats the procedure to perform IOS upgrade on stack? Do I need to do it on all the switches?

If you have physical access to switch, to save time just load the new image to a USB and then copy it to the switch via the command
Switch#copy usbflash0:[image name] flash:
And repeat the same command for the second switch
Switch#copy usbflash0:[image name] flash2:
Once done change the boot system to the newly uploaded image
Switch(config)# boot syst switch all flash:[image name]

reload....

https://www.cisco.com/c/en/us/support/docs/switches/catalyst-3850-series-switches/117552-technote-cat3850-00.html

[avilt]

It seems if I have two switches stacked without XPS, it doesnt' really matter with color code, I need not worry about the color code order. Please confirm.

In the above scenario, how can I shutdown a particular switch, because if I pull the power cable from the switch its still powered by stack power.