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Forum Discussion
M4300 & NBASE-T
Hello, I am using a M4300 as part of an NDI workflow. I am attempting to use a 10Gtek ASF-10G-T SFP+ in one of the 10G ports, connected to a TRENDnet TUC-ET2G 2.5G USB Ethernet adapter. I can get...
Thank you, this is correct. Fiber SFP+ ports won't support anything else than 1G SFP transceivers/speed and 10G SFP+ transceivers/speed. There is no Multi-Gigabit Ethernet (2.5G speed or 5G speed) support on SFP+ ports, even on the M4300-16X or M4300-96X switches which offer Multi-Gigabit Ethernet on their 10GBASE-T copper (RJ45) ports.
I hope this helps, M4300 datasheet is detailing various speeds supported by every port very precisely page 3 (At a Glance section), and page 33 (Tech Spec section).
Regards,
LaurentMa So a switch has to support the speeds specifically on the ports, even if the SFP+ module supports 2.5G/5G speeds?
- Yes. For the very same reason one can't just replace the PHY interface to a switch cores designed for 1/10G to make it MultiGig capable.
In the SFP/SFP+ word, the complete data path from the between the SFP (+) interfaces on the switch side must and does run at the same speeds.
Long time ago in the early days of Gigabit Ethernet we faced a performance issue on Sun production servers and found the switches were operating on Gigabit, while the Sun interfaces were on Fast Ethernet ... it worked, kind of ... similar to your SFP+ interface doing 2.5G. Errors and retransmits happened invisibly in both cases.
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