Interoperability of mellanox SR4E QSFP+ 40Gb module


we are using a storage equipped with ConnectX-3 40GbE networking. We’d like to to connect it to a dell switch located 150m away from the equipment. Do I understand correctly that we can use MC2210411-SR4E transceiver from Mellanox side and ESR transceiver in the switch? Will the link be ok?

Unfortunately I didn’t find any standard about SR4E, ESR(dell), CSR4(cisco) and their interoperability

best regards


Hello George,

Based on the PB of the MC2210411-SR4E ( the range is up 300m.

If the Dell switch does not support SR4E but only SR4, the following module can be used → MMA1B00-B150D ( This transceiver can go up to 150m which you mentioned that is the distance.

Please reach out to Dell Support and validate if the switch type you have supports SR4E.

Thank you,

~Mellanox Technical Support

Hello Martijn

The question is not whether Dell and other vendours have SR4E modules available. In fact all of them do.

Dell has ESR QSFP+ modules available (same parameters - up to 300m). But as I understand - ESR (or SR4E as Mellanox calls it) is not a standard, it’s proprietary according to wikipedia ( ). So the question is about interoperability between 40GBASE-eSR4 modules of different vendors