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No link lights on shared SFP ports (GS752TPS)
***EDIT***
I just discovered that the SFP ports on the switch are fine. I plugged in another switch to the SFP port, and it works just fine. The issue must be on the server side. I would delete thi...
Most SFP+ ports don't allow to fix/lower the speed. Only option would be to install a pure 1G modules and use fiber, not DAC. SFP, SFP+, and fiber does not know anything about speed negotiation - different from plain copper Ethernet.
What server/OS/SFP+ network interface are we faing on the other side?
Hi ElevateCU,
Welcome to our community! :)
As per checking, you are trying to connect one of your servers to the shared port or combo port of the GS752TPS. Please make sure that the "Admin Mode" is not disabled on port 47, you may check this under Switching > Ports > Port Configuration. May I know the status of the port 47 on the same page? Does it say Link Down? What is the model number of the module that you are using?
I'm looking forward to your reply.
Regards,
JohnCarloV
NETGEAR Community Team
Admin mode is enabled on every single port. The UI shows the port as "Link Down" even though the cable is plugged into the port and the server. I am using a Netgear-compatible SFP Direct Connect cable. It is the same one that I am using to stack my switches. I have tried swapping cables, and that doesn't change anything, so I know the cable is good. The only thing I can think of is an issue with the type of cable for this particular use. Should I not be able to use a Direct Connect cable for connecting a server to the switch?
Thanks for your reply.
May you be able to try connecting it to the other SFP ports? Please make sure that the port that you are going to use is not set to "Stack".
Regards,
JohnCarloV
NETGEAR Community Team
I have tried that, on 2 switches in the stack, using all possible shared SFP ports. In fact, I even treod using a different switch entirely (A GS752TP and an FS726T). With those switches, and the same cable, I get link lights when the cable goes from switch to switch, but nothing when it connects to the server.
FWIW - the server in question isn't a system with SFP+ ports defaulting to 10 Gb/s?
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