Am i able to use SFP+ 10Gbase-SR with MCX312A-XCBT adapter?


I recently bought the MCX312A-XCBT adapter not knowing which optical module i was going to use. It turned out that the sfp+ 10gbase-SR is actually needed. The question is does this adapter support this module. Documentation… states that 10GBASE-CX4, 10GBASE-R, and 1000BASE-R is supported. But there is actually no 10GBASE-R standart it doesn’t exist or i don’t know about it. Maybe 10GBASE-R means typo 10gbase-SR or LR ER or KR?

I’m not able to buy exactly MFM1T02A-SR because they are out of stock everywhere in Moscow. Sales manager just told me that this module is Finistar FTLX8571D3BCL-ME branded Mellanox. FTLX8571D3BCL (whithout -ME at the end) is in stock and i am looking farward to buying it. Do you happen to know will it actually fit?

I don’t have details on FTLX8571D3BCL vs. FTLX8571D3BCL-ME testing, but I suspect that “-ME” stands for Mellanox. I don’t think you will have problems with Finisar in general. BTW, firmware release notes is a good source for supported/tested cables and modules, see for example:



MCX312A-XCBT can be used with both SR and LR modules - for example with these Mellanox modules (also qualified with similar modules from other major vendors):

MFM1T02A-LR Mellanox optical module, ETH 10GbE, 10Gb/s, SFP+, LC-LC, 1310nm, LR up to 10km

MFM1T02A-SR Mellanox optical module, ETH 10GbE, 10Gb/s, SFP+, LC-LC, 850nm, SR up to 300m

BTW, they also can be used with 1GE modules:

MC3208011-SX Mellanox® Optical module, ETH 1GbE, 1Gb/s, SFP, LC-LC, SX 850nm, up to 500m

MC3208411-T Mellanox® module, ETH 1GbE, 1Gb/s, SFP, Base-T, up to 100m

Thanks a lot!

FTLX8571D3BCL works fine.