The root cause of your problem are the following errors;
Jan 22 12:01:08: %PHY-4-MODULE_DUP: SFPs in Gi1/0/2 and in Gi1/0/4 have duplicate vendor-id and serial numbers
This message means that the small form-factor pluggable (SFP) module was identified as a Cisco SFP, but its vendor ID and serial number match that of another SFP in the system. The first [chars] is the interface in which the SFP is installed, and the second [chars] is the interface where the duplicate SFP is installed.
Cisco SFP modules are assigned unique serial numbers. Verify that the module was obtained from Cisco or a supported vendor. Copy the message exactly as it appears on the console or in the system log. Research and attempt to resolve the error by using the Output Interpreter. Use the Bug Toolkit to look for similar reported problems. If you still require assistance, open a case with the TAC, or contact your Cisco technical support representative, and provide the representative with the gathered information. For more information about these online tools and about contacting Cisco, see the "Error Message Traceback Reports" section.
The modules say Cisco Systems, and we did purchase them from a supported vendor.
I tried your suggestions. The Output Interpreter reported "No information on error code PHY-4-MODULE_DUP". The Bug Toolkit doesn't have anything on this either. I also haven't found anything in the Cisco online support sites.
The odd thing about this is that there isn't another SFP in the system. Inserting this module in G1/0/2 generates this error message even though there isn't a SFP in G1/0/4.
Hi everyone, I would like to thank you in advance for any help you can provide a newcomer like myself!
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