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Copper SFP link issue

Tue Jun 10, 2025 12:22 pm

I'm testing two copper-SFP modules on a CRS328 swos 2.17 :

TLC FABRIK 1000base-t-tlc
FINISAR CORP. FCLF-8521-3-HP

First of all, both need Auto Negotiation to be turned off to have link UP , is this normal ?

The LINK status on TLC FABRIK follows the actual ethernet link
The LINK status on FINISAR/HP stays always ON despite ethernet cable is either connected or not.

Traffic flows correctly on both interface modules, is this an issue anyway ?