Wireshark-users: [Wireshark-users] SMB Diagnostics w/ Wireshark
From: "St. Onge,Adam" <ASTONGE@xxxxxxxxxxxxx>
Date: Fri, 20 Nov 2009 07:28:27 -0500

I was wondering if anyone has any training resources on troubleshooting SMB performance with Wireshark?

I have a situation where the same user from the same workstation accesses the same file on two different NAS devices, and sees much worse performance on one.  I took a look at the trace and see some differences, specifically in the size of the READ ANDX buffers, where one uses a 16K buffer and the other uses a 64K buffer, but I dont see where those sizes are negotiated with the NAS device.

Any help would be appreciated.




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