Information to connect Mellanox SB7890 to ethernet via Mikrotik

Hello,

Hope you are doing well.

I have a switch Mellanox SB7890 36 Port switch (100 GB SFP port) for transferring data from an webserver to internet.
I want to use a Sophos Firewall XGS3100(10 GB SFP port) for filtering these data.

My issue is how to connect the Mellanox SB7890 (infiniband) to Sophos (ethernet).
I think to add a Mikrotik device CRS504-4XQ-IN 100 GB (ethernet) switch between Mellanox and Sophos but i do not know if this thing works and what cables may i need.
So, topology must be:
Mellanox model SB7890 —> Mikrotik model ??? —> Sophos XGS3100 —> WAN
Do i need any adaptor for Mellanox side? I think to connect all these devices in redundace (2 pair for each device)

Mellanox SB7890 → DAC Cable 100 GB (quantity 2) for connecting Mellanox- Mikrotik
Mikrotik CRS504-4XQ-IN 100 GB → QSFP28 modules (quantity 2) + DAC cable 10 GB(quantity 2) for connecting Mikrotik- Sophos
Mellanox CX455A ConnectX-4 VPI Adapter Card → (quantity 1) .

Is it okay, do I need to add anything else?
Thank You in advance!

Mellanox SB7890 is unmanaged Inifniband-ONLY switch. There is no way that you could connect him to regular ethernet network.

Actually, there is one way - to spend more money and buy Mellanox VLT-30034 4036E Infiniband swith which has Ethernet gateway, or some other similar switch.