QSFP28 Read

[EZi]

Hello,

I am trying to read a QSFP28/100G adapter (Intel) but in the output I am getting some weird characters (not vendor name, serial etc). Should I change anything? I chose QSFP from the menu. I tried to read SFP+ and it returned valid data (vendor name etc). The software version is the 1.9.1.

[ArT]

Could you check in your QSFP datasheet how is it coded? It should be SFF-8436 or SFF-8636 which is valid for QSFP transceivers but I think that your QSFP transceived is compilant with SFF-8472 which is valid for SFP/SFP+. It happens rarely but when it happen, in such case it should be read/write as SFP not QSFP.

PS. you can read more about MSA standards here: https://forum.reveltronics.com/viewtopi ... =32&t=1017

[EZi]

Thanks for the reply.

The datasheet says the it is following the spec SFF-8636
https://www.intel.com/content/www/us/en ... brief.html

I got some results when I set the area to 128B Page Mapping. Is this right?


Also, I am trying to start password tool but I am getting the error "device TIMEOUT". Any help on this?

[ArT]

Please share me dump file which you read as QSFP and the one you read as SFP.
Does brute force work as SFP?

[thankfly]

It based on SFF-8636, and check you power supply if returns error.
I have several the same modules, and test all are fine.

[EZi]

Sorry for the late response. How I can check the power supply?
@thankfly are you selecting QSFP type? Also are you getting results with the read operation with the default settings? (256)
@ArT How can I send you the dumps? Directly or I can post them here?

[ArT]

You can post them here as zip file or share link to dropbox, onedrive or other cloud

[EZi]

I attach two .bin. One with default read settings (256) and one with page select (128)

[ArT]

The page select file (128B) looks fine, but A0 area file (256B) looks corrupted, in second half only 2 first bytes are read correctly. Please select "BP" checkbox - any difference?

[EZi]

Hello,

Yes, using BP the read is correct. What is the case? What is the function of BP?
Also, when I am trying to 'bruteforce' the password I am getting device timeout error.