Wireshark OUI Lookup Tool Broken

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Can you provide some examples that don't work?

Some recent work was done on the tool, so I would expect it to be working better than it had before. See Bug 16038.

Example: 00d9.d110.21f9 No Matches

Example: 00:d9:d1:10:21:f9 00:D9:D1 Sony Interactive Entertainment Inc.

These formats all work:

OUI search           Results
00:d9:d1             00:D9:D1 Sony Interactive Entertainment Inc.
00-d9-d1             00:D9:D1 Sony Interactive Entertainment Inc.
00.d9.d1             00:D9:D1 Sony Interactive Entertainment Inc.
00:d9:d1:10:21:f9    00:D9:D1 Sony Interactive Entertainment Inc.
00-d9-d1-10-21-f9    00:D9:D1 Sony Interactive Entertainment Inc.
00.d9.d1.10.21.f9    00:D9:D1 Sony Interactive Entertainment Inc.

Can you please try this format (format of any Cisco device, and #1 on the example list): 6412.25e4.2d62

Sorry, I didn't mean to imply that all formats worked, only those formats that I listed. The bug I linked to refers to the recent work done on the OUI tool, and apparently not every format is supported, whether by omission or by design. The example on the OUI lookup page works, namely 0000.0c, and so does 6412.25, but other formats don't work as you've discovered. I'd recommend adding a comment to the bug report asking about this, and then either someone (Peter, most likely) can either explain why it's not supported or reopen the bug to fix the tool.