Wireshark-bugs: [Wireshark-bugs] [Bug 3112] CDP Checksum Calculation Incorrect

From: bugzilla-daemon@xxxxxxxxxxxxx
Date: Sun, 4 Jan 2009 21:17:49 -0800 (PST)

https://bugs.wireshark.org/bugzilla/show_bug.cgi?id=3112





--- Comment #16 from Greg Neujahr <wireshark@xxxxxxxxxxxxxxxxxxxxx>  2009-01-04 21:17:48 PDT ---
(In reply to comment #14)

Checked the patch against live output from the same switch as previous, but
still showed checksum calculation errors. In particular, it seems to be off by
one (ie: 0x356d [incorrect, should be 0x346d]). I will verify with a cisco 800
series router in the morning (about 9 hours from now) to see if it is isolated
to just this switch. This will also allow me to test using another capture
machine as well.

I also turned off TCP/IP checksum offloading on the card in the event it was
cause problems (a long shot) and it didn't affect anything.

I'll retest with the switch and an 800 series router using a new capture
machine in the morning and see what happens and get more info back to you, as
well as a capture from the router.


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