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3850 switch stack

moman62
Level 1
Level 1

My cisco 3850 originally came with the following switchports configured:
GigabitEthernet6/0/1 unassigned YES unset down down
GigabitEthernet6/0/2 unassigned YES unset down down
GigabitEthernet6/0/3 unassigned YES unset down down
GigabitEthernet6/0/4 unassigned YES unset down down
I changed to the following:
GigabitEthernet1/0/1 unassigned YES unset down down
GigabitEthernet1/0/2 unassigned YES unset down down
GigabitEthernet1/0/3 unassigned YES unset down down
GigabitEthernet1/0/4 unassigned YES unset down down
But when I do sh ip int br the following shows:
How do I remove the gigeth 6/0/1

GigabitEthernet0/0 unassigned YES NVRAM administratively down down
GigabitEthernet1/0/1 unassigned YES unset down down
GigabitEthernet1/0/2 unassigned YES unset down down
GigabitEthernet1/0/3 unassigned YES unset down down
GigabitEthernet1/0/4 unassigned YES unset down down
GigabitEthernet1/0/5 unassigned YES unset down down
GigabitEthernet1/0/6 unassigned YES unset down down
GigabitEthernet1/0/7 unassigned YES unset down down
GigabitEthernet1/0/8 unassigned YES unset down down
GigabitEthernet1/0/9 unassigned YES unset down down
GigabitEthernet1/0/10 unassigned YES unset down down
GigabitEthernet1/0/11 unassigned YES unset down down
GigabitEthernet1/0/12 unassigned YES unset down down
GigabitEthernet1/0/13 unassigned YES unset down down
GigabitEthernet1/0/14 unassigned YES unset down down
GigabitEthernet1/0/15 unassigned YES unset down down
GigabitEthernet1/0/16 unassigned YES unset down down
GigabitEthernet1/0/17 unassigned YES unset down down
GigabitEthernet1/0/18 unassigned YES unset down down
GigabitEthernet1/0/19 unassigned YES unset down down
GigabitEthernet1/0/20 unassigned YES unset down down
GigabitEthernet1/0/21 unassigned YES unset down down
GigabitEthernet1/0/22 unassigned YES unset down down
GigabitEthernet1/0/23 unassigned YES unset down down
GigabitEthernet1/0/24 unassigned YES unset down down
GigabitEthernet1/1/1 unassigned YES unset down down
GigabitEthernet1/1/2 unassigned YES unset down down
GigabitEthernet1/1/3 unassigned YES unset down down
GigabitEthernet1/1/4 unassigned YES unset down down
Te1/1/1 unassigned YES unset down down
Te1/1/2 unassigned YES unset down down
Te1/1/3 unassigned YES unset down down
Te1/1/4 unassigned YES unset down down
GigabitEthernet6/0/1 unassigned YES unset down down
GigabitEthernet6/0/2 unassigned YES unset down down
GigabitEthernet6/0/3 unassigned YES unset down down
GigabitEthernet6/0/4 unassigned YES unset down down
GigabitEthernet6/0/5 unassigned YES unset down down
GigabitEthernet6/0/6 unassigned YES unset down down
GigabitEthernet6/0/7 unassign

2 Accepted Solutions

Accepted Solutions

M02@rt37
VIP
VIP

Hello @moman62 

Regarding the output, your switch was previously part of a stack, and the Giga 6/0/x interfaces were assigned to switch number 6 in that stack. Now that you have changed the interfaces, it suggests the switch is operating as a standalone unit or has been renumbered within a new stack...

However, the old Gi 6/0/x interfaces are still showing up, which likely means the switch is retaining the previous stack member configuration. To remove these interfaces, you should first check the switch stack configuration to see if any remnants of the old stack setup remain. If the switch was once in a stack and is now standalone, clearing the old stack member information and reloading the switch should resolve the issue. If the interfaces still persist, a factory reset may be necessary to completely remove the old stack configuration...

 

Best regards
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View solution in original post

I used no switch stack-member-number provision and that cleared the old stack info.

View solution in original post

4 Replies 4

M02@rt37
VIP
VIP

Hello @moman62 

Regarding the output, your switch was previously part of a stack, and the Giga 6/0/x interfaces were assigned to switch number 6 in that stack. Now that you have changed the interfaces, it suggests the switch is operating as a standalone unit or has been renumbered within a new stack...

However, the old Gi 6/0/x interfaces are still showing up, which likely means the switch is retaining the previous stack member configuration. To remove these interfaces, you should first check the switch stack configuration to see if any remnants of the old stack setup remain. If the switch was once in a stack and is now standalone, clearing the old stack member information and reloading the switch should resolve the issue. If the interfaces still persist, a factory reset may be necessary to completely remove the old stack configuration...

 

Best regards
.ı|ı.ı|ı. If This Helps, Please Rate .ı|ı.ı|ı.

Martin L
VIP
VIP

I think those are "gost" configs , aka not real; I think we had some discussion about this some time ago. it also could be a bug in IOS, a known bug.

If you removed/changed switch from 6 to 1 and those 6/0/x still showing up after reboot, try delete running config to use default start up config.

Check flash for stack info text file (forgot name) and vlan.dat, also u can delete all files except IOS and start-up config (or rename running to back.running in case u need it later, if running config is missng, switch sould start with default configs) 

Regards, ML
**Please Rate All Helpful Responses **

I used no switch stack-member-number provision and that cleared the old stack info.

Thanks for your feedback @moman62 

Best regards
.ı|ı.ı|ı. If This Helps, Please Rate .ı|ı.ı|ı.