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09-14-2012 11:39 AM - edited 03-07-2019 08:53 AM
I have a stack of 4 switches. I can't figure out why two of the ports are down? SW1 port 2 connects to SW4 port 2. Is there a way to bring the port up? I read the guide on configuring stacks, but it makes it sound like the only time the ports would be down is b/c the cable is bad.
CiscoStack1#show switch stack-ports
Switch # Port 1 Port 2
-------- ------ ------
1 Ok Down
2 Ok Ok
3 Ok Ok
4 Ok Down
CiscoStack1#show switch neighbors
Switch # Port 1 Port 2
-------- ------ ------
1 2 None
2 1 3
3 2 4
4 3 None
CiscoStack1#show switch stack-ring speed
Stack Ring Speed : 16G
Stack Ring Configuration: Half
Stack Ring Protocol : StackWisePlus
Solved! Go to Solution.
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09-14-2012 11:43 AM
Hi,
In most cases it is either bad cable or faulty stack port.
Test with another cable (e.g. take of of those that we see as Up connections) and if the ports come up, replace the cable. Otherwise test different port pair combination to find which is faulty - on switch 1 or 4.
Kind Regards,
Ivan Shirshin
**Please grade this post if you find it useful.
Ivan

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09-14-2012 11:43 AM
Hi,
In most cases it is either bad cable or faulty stack port.
Test with another cable (e.g. take of of those that we see as Up connections) and if the ports come up, replace the cable. Otherwise test different port pair combination to find which is faulty - on switch 1 or 4.
Kind Regards,
Ivan Shirshin
**Please grade this post if you find it useful.
Ivan
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09-14-2012 11:52 AM
Nevermind. I figured out what the previous engineer got fired. I looked at the cables and they were all tight and snug, so I decided to pull the cable off to swap it. The genius never took the little rubber cap off the cable end.
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11-05-2020 07:34 PM
A colleague and I just had a good laugh at your expense there abrrymnvette haha. Can't believe that cable still fit with the cap still on!
