If the sniffer connected to the traffic monitoring port on the Fabric Interconnect (port 1-8 on a 6120) is running at 1Gbps, the Status of the Port will be failed with the additional information as “SFP Validation Failed” even with a valid SFP in the port. The speed of the port needs to be set at 1 Gbps for it to be in UP state as it does not auto-negotiate. The GUI option for changing speed of a monitoring port to 1 Gbps is not present (Defect ID: CSCti86217) so as a workaround, set the as an Uplink port, set the admin speed to 1 Gbps (under the LAN tab) and then unconfigure the port. The admin speed sticks as 1 Gbps and then the port can be set as a Monitor port and will come up at 1Gbps.
In my experience, setting the port's admin speed to 1 Gbps from 'Show Interface' in the equipment tab is not enough to force the port to preserve the 1 Gbps speed.
I'm running into the same problem, although your work-around doesn't do the trick for me. While set as uplink port, I have set the speed to 1Gbps from the show interface and LAN tab as you suggested.
ReplyDeleteI then unconfigure, and set back as a destination on my monitor, but then still getting the same SFP validation error.
Thanks for the helpful post.
The ability to select the speed for SPAN was added as a native option in UCSM 2.0.2w
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