Switch port in err-disable state

Member_2_6498066
Member_2_6498066 used Ask the Experts™
on
Switchport in an err-disable state due to MAC Adress conflict.

Have cleared the DHCP bindings which cleared the err-disable error, but now have no connectivity.
Comment
Watch Question

Do more with

Expert Office
EXPERT OFFICE® is a registered trademark of EXPERTS EXCHANGE®
Distinguished Expert 2018
Commented:
cleared the err-disable error
Cleared root cause, or removed port err-disabled state?

It was not stated model/vendor, but generally if error auto recovery is not configured, you should bounce port to make if functional.

interface gi1/0/1
 shut
 no shut

Author

Commented:
Cisco 3750
Did bump the port.
Now it says not connected.

Author

Commented:
Now it is again err-disabled.
Ensure you’re charging the right price for your IT

Do you wonder if your IT business is truly profitable or if you should raise your prices? Learn how to calculate your overhead burden using our free interactive tool and use it to determine the right price for your IT services. Start calculating Now!

Author

Commented:
Really strange.

Computer next to it has the exact same MAC.

Checked using ipconfig/all

This strikes me as very odd as both computers have been working for months.

Is there something in DHCP bindings that would give the same MAC to both computers and fool ipconfig/all

I did clear DHCP bindings.

Only the one computer I am trying to put back on the network showed a binding.

This puzzles me.
Distinguished Expert 2018

Commented:
Port configuration?
Logs?

Author

Commented:
Thank you.
Distinguished Expert 2018

Commented:
You're welcome.
Generally, two exactly the same MAC addresses can't be present in the same VLAN.

Do more with

Expert Office
Submit tech questions to Ask the Experts™ at any time to receive solutions, advice, and new ideas from leading industry professionals.

Start 7-Day Free Trial