Datacenter technician from Daejeon. Mostly Dell and HPE.
The poster bought a Cisco SFP-10G-SR on eBay (markings suggesting 2007 manufacture) and, warned about counterfeit Cisco optics with longevity and safety risks, asked how to tell whether it was genuine before deploying it. Hardware involved: Cisco SFP-10G-SR. Reported symptoms/messages: authenticity…
A FreeNAS build on a Supermicro X11SPM-TPF board would not recognise a Ubiquiti UF-RJ45-10G SFP+ copper module in the on-board SFP+ cage, although the switch side showed link. The poster asked for BIOS settings or a compatible 10G RJ45 transceiver. Hardware involved: Supermicro X11SPM-TPF, Intel…
The poster connected a Dell server to a Cisco Catalyst C9500-48Y4C (IOS XE 17.9.3) using a Dell L56SF018-SD-R 3 m DAC (DAC-SFP-3M). The cable is not in Cisco's optics compatibility matrix, and 'show interface status' shows port TwentyFiveGigE1/0/35 as err-disabled. Logging shows…