09-05-2013 07:37 AM - edited 03-07-2019 03:19 PM
Hi all.
Today i decomissioned a switch from my 3750 stack. Upon recabling my stack i have lost a member from the pool. The switch is operational and performing as normal but is missing from the stack. Upon closer inspection it appears a port is down. The same cable's are being used before the switch removal and the ports were working fine prior to this also.
switch1>show switch
Current
Switch# Role Mac Address Priority State
--------------------------------------------------------
1 Slave 0013.c406.4780 8 Ready
*2 Master 0013.c490.2700 9 Ready
3 Slave 0000.0000.0000 0 Provisioned
4 Slave 0000.0000.0000 0 Provisioned
5 Slave 001c.f932.c180 1 Ready
Switch 4 was removed from the stack.
Switch 3 is showing as 'Provisioned' but is up, running and cabled correctly.
switch1>show switch detail
Current
Switch# Role Mac Address Priority State
--------------------------------------------------------
1 Slave 0013.c406.4780 8 Ready
*2 Master 0013.c490.2700 9 Ready
3 Slave 0000.0000.0000 0 Provisioned
4 Slave 0000.0000.0000 0 Provisioned
5 Slave 001c.f932.c180 1 Ready
Stack Port Status Neighbors
Switch# Port 1 Port 2 Port 1 Port 2
--------------------------------------------------------
1 Ok Ok 2 None
2 Ok Ok 1 5
5 Ok Down 2 None
It appears there are some ports down but i have checked all the cabling which appears to be correct.
The switch that was removed ( Switch 4 ) was at the bottom of the stack in terms of cabling when it was removed. Switch 3 is now at the bottom of the stack and appears to be missing?
Thanks.
09-05-2013 08:09 AM
Hi Jamie,
Can you provide details on how the stackwise cables are ordered. Using the layout of the second table from 'sh switch detail' .
cheers,
Seb.
09-05-2013 08:18 AM
Hi Seb.
The order of the switches are as follows:
switch 1-5
switch 1-2
switch 1-1
switch 1-3
switch 1-4
Switch 1-4 was removed and the cabling amended so the new layout looks like this:
switch 1-5
switch 1-2
switch 1-1
switch 1-3
Currently Switch 1-3 is 'missing' but still operational. Same cables that were being used and were working fine.
09-05-2013 09:54 PM
Did you remove switch 4 when the stack was up and running? If all your connections are correct, then try to reload the stack i expect the issue will be cleared after that
Sent from Cisco Technical Support iPhone App
09-06-2013 01:08 AM
Switch 4 was powered off... Cabling removed, and re-cabled to the new layout shown above.
'Reload Stack'... Would this be rebooting the stack? Unfortunately this is a 'live' environment. Is there a way to resolve this without rebooting the Switch Stack?
09-06-2013 02:36 AM
Can you console onto switch3 and check the logs? Is there anything related to stack ports?
What is the output of 'sh switch detail' ?
09-06-2013 07:05 AM
I haven't got console access to switch3 right now but here is the output of 'sh switch detail'
switch1>show switch detail
Current
Switch# Role Mac Address Priority State
--------------------------------------------------------
1 Slave 0013.c406.4780 8 Ready
*2 Master 0013.c490.2700 9 Ready
3 Slave 0000.0000.0000 0 Provisioned
4 Slave 0000.0000.0000 0 Provisioned
5 Slave 001c.f932.c180 1 Ready
Stack Port Status Neighbors
Switch# Port 1 Port 2 Port 1 Port 2
--------------------------------------------------------
1 Ok Ok 2 None
2 Ok Ok 1 5
5 Ok Down 2 None
Switch 4 has been removed.
09-06-2013 08:51 AM
Try to remove 3 from the stack, and also remove 4 from your config
follow this instructions, I hope this will help
09-09-2013 02:52 AM
I shall remove the config for switch4 but currently switch3 is a production switch and serving traffic. If i remove it from the stack will this not stop the switch from functioning? Also, i want switch3 to be in 'play' not removed from the stack.
09-06-2013 04:56 AM
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