Here's a link to manually change or renumber a Cisco Catalyst 3650 stack number. This also applies to a Cisco Catalyst 3850 since it has an identical IOS-XE architecture. The switch was removed from a stack and re-purposed as a standalone switch. It remained as logical switch number 4 and the interfaces starts with Gi4/0/x which is quite annoying.
C3650#show inventory
NAME: "c36xx Stack", DESCR: "c36xx Stack"
PID: WS-C3650-24PS , VID: V03 , SN: FDO20161234
NAME: "Switch 4", DESCR: "WS-C3650-24PS-S"
PID: WS-C3650-24PS-S , VID: V03 , SN: FDO20161234
NAME: "Switch 4 - Power Supply A", DESCR: "Switch 4 - Power Supply A"
PID: PWR-C2-640WAC , VID: V02 , SN: LIT2007ABCD
C3650#show switch
Switch/Stack Mac Address : e00e.dafd.9123 - Local Mac Address
Mac persistency wait time: Indefinite
H/W Current
Switch# Role Mac Address Priority Version State
------------------------------------------------------------
*4 Active e00e.dafd.9123 1 V03 Ready
C3650#show run | i switch
switch 4 provision ws-c3650-24ps
You can't remove the switch <NUMBER> provisioned <PLATFORM> command. The correct way to revert back is to use the switch <NUMBER> renumber <NUMBER> privileged EXEC command, save and reload the switch.
C3650#no s?
% Unrecognized command
C3650#configure terninal
Enter configuration commands, one per line. End with CNTL/Z.
C3650(config)#no switch ?
<1-9> Switch Number
C3650(config)#no switch 4 ?
provision Configure Switch provision / offline config
C3650(config)#no switch 4 provision ?
<cr>
C3650(config)#no
switch 4 provision
Error: A switch is already physically present at this location
C3650#switch ?
<1-9> Switch Number
C3650#switch 4 ?
priority Set the priority of the specified switch
renumber Renumber the specified switch number
stack Stack port enable or disable
C3650#switch 4 renumber ?
<1-9> New number of the Switch
C3650#switch 4 renumber 1
WARNING: Changing the switch number may result in a configuration change for that switch. The interface configuration associated with the old switch number will remain as a provisioned configuration. Do you want to continue?[y/n]y
C3650#sh int status // IT STILL SHOWS AS Gi4/0/x; SAVE AND RELOAD THE SWITCH
Port Name Status Vlan Duplex Speed Type
Gi4/0/1 notconnect 1 auto auto 10/100/1000BaseTX
Gi4/0/2 notconnect 1 auto auto 10/100/1000BaseTX
Gi4/0/3 notconnect 1 auto auto 10/100/1000BaseTX
Gi4/0/4 notconnect 1 auto auto 10/100/1000BaseTX
Gi4/0/5 notconnect 1 auto auto 10/100/1000BaseTX
Gi4/0/6 notconnect 1 auto auto 10/100/1000BaseTX
Gi4/0/7 notconnect 1 auto auto 10/100/1000BaseTX
Gi4/0/8 notconnect 1 auto auto 10/100/1000BaseTX
Gi4/0/9 notconnect 1 auto auto 10/100/1000BaseTX
Gi4/0/10 notconnect 1 auto auto 10/100/1000BaseTX
Gi4/0/11 notconnect 1 auto auto 10/100/1000BaseTX
Port Name Status Vlan Duplex Speed Type
Gi4/0/12 notconnect 1 auto auto 10/100/1000BaseTX
Gi4/0/13 notconnect 1 auto auto 10/100/1000BaseTX
Gi4/0/14 notconnect 1 auto auto 10/100/1000BaseTX
Gi4/0/15 notconnect 1 auto auto 10/100/1000BaseTX
Gi4/0/16 notconnect 1 auto auto 10/100/1000BaseTX
Gi4/0/17 notconnect 1 auto auto 10/100/1000BaseTX
Gi4/0/18 notconnect 1 auto auto 10/100/1000BaseTX
Gi4/0/19 notconnect 1 auto auto 10/100/1000BaseTX
Gi4/0/20 notconnect 1 auto auto 10/100/1000BaseTX
Gi4/0/21 notconnect 1 auto auto 10/100/1000BaseTX
Gi4/0/22 notconnect 1 auto auto 10/100/1000BaseTX
Gi4/0/23 notconnect 1 auto auto 10/100/1000BaseTX
Gi4/0/24 notconnect 1 auto auto 10/100/1000BaseTX
Gi4/1/1 notconnect 1 auto auto unknown
Gi4/1/2 notconnect 1 auto auto unknown
Port Name Status Vlan Duplex Speed Type
Gi4/1/3 notconnect 1 auto auto unknown
Gi4/1/4 notconnect 1 auto auto unknown
C3650#write memory
*Sep 20 11:30:50.555: %SYS-5-CONFIG_I: Configured from console by console
Building configuration...
Compressed configuration from 2583 bytes to 1369 bytes[OK]
C3650#reload
Reload command is being issued on Active unit, this will reload the whole stack
Proceed with reload? [confirm]
*Sep 20 11:31:12.422: %SYS-5-RELOAD: Reload requested by console. Reload Reason: Reload command.
*Sep 20 11:31:13.129: %STACKMGR-1-RELOAD_REQUEST: 4 stack-mgr: Received reload request for all switches, reason Reload command
*Sep 20 11:31:13.130: %STACKMGR-1-RELOAD: 4 stack-mgr: Reloading due to reason Reload command
*Sep 20 11:31:13.631: %IOSXE-3-PLATFORM: 4 process sysmgr: Reset/Reload requested by [stack-manager].
<Mon Sep 20 11:31:13 2021> Message from sysmgr: Reason Code:[3] Reset Reason:Reset/Reload requested by [stack-manager]. [Reload command]
umount: /proc/fs/nfsd: not mounted
Unmounting ng3k filesystems...
Warning! - some ng3k filesystems may not have unmounted cleanly...
Please stand by while rebooting the system...
Restarting system.
Booting...
<OUTPUT TRUNCATED>
C3650#show interface status
Port Name Status Vlan Duplex Speed Type
Gi1/0/1 notconnect 1 auto auto 10/100/1000BaseTX
Gi1/0/2 notconnect 1 auto auto 10/100/1000BaseTX
Gi1/0/3 notconnect 1 auto auto 10/100/1000BaseTX
Gi1/0/4 notconnect 1 auto auto 10/100/1000BaseTX
Gi1/0/5 notconnect 1 auto auto 10/100/1000BaseTX
Gi1/0/6 notconnect 1 auto auto 10/100/1000BaseTX
Gi1/0/7 notconnect 1 auto auto 10/100/1000BaseTX
Gi1/0/8 notconnect 1 auto auto 10/100/1000BaseTX
Gi1/0/9 notconnect 1 auto auto 10/100/1000BaseTX
Gi1/0/10 notconnect 1 auto auto 10/100/1000BaseTX
Gi1/0/11 notconnect 1 auto auto 10/100/1000BaseTX
Port Name Status Vlan Duplex Speed Type
Gi1/0/12 notconnect 1 auto auto 10/100/1000BaseTX
Gi1/0/13 notconnect 1 auto auto 10/100/1000BaseTX
Gi1/0/14 notconnect 1 auto auto 10/100/1000BaseTX
Gi1/0/15 notconnect 1 auto auto 10/100/1000BaseTX
Gi1/0/16 notconnect 1 auto auto 10/100/1000BaseTX
Gi1/0/17 notconnect 1 auto auto 10/100/1000BaseTX
Gi1/0/18 notconnect 1 auto auto 10/100/1000BaseTX
Gi1/0/19 notconnect 1 auto auto 10/100/1000BaseTX
Gi1/0/20 notconnect 1 auto auto 10/100/1000BaseTX
Gi1/0/21 notconnect 1 auto auto 10/100/1000BaseTX
Gi1/0/22 notconnect 1 auto auto 10/100/1000BaseTX
Gi1/0/23 notconnect 1 auto auto 10/100/1000BaseTX
Port Name Status Vlan Duplex Speed Type
Gi1/0/24 notconnect 1 auto auto 10/100/1000BaseTX
Gi1/1/1 notconnect 1 auto auto unknown
Gi1/1/2 notconnect 1 auto auto unknown
Gi1/1/3 notconnect 1 auto auto unknown
Gi1/1/4 notconnect 1 auto auto unknown
C3650#show switch
Switch/Stack Mac Address : e00e.dafd.1234 - Local Mac Address
Mac persistency wait time: Indefinite
H/W Current
Switch# Role Mac Address Priority Version State
------------------------------------------------------------
*1 Active e00e.dafd.1234 1 V03 Ready
C3650#sh run | i switch
switch 1 provision ws-c3650-24ps
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