Wireshark mailing list archives
Re: duplicate frames captured by tcpdump
From: Jeff Morriss <jeff.morriss.ws () gmail com>
Date: Thu, 15 Jan 2015 11:07:59 -0500
On 01/15/15 00:00, Manolis Katsidoniotis wrote:
Hello This is a long shot my apologies if the question is not directly related to this forum. In our lab we use (linux) tcpdump to capture frames (using interface "any" for applications that do not communicate internally) and wireshark to view and process the captured frames. Lately after some upgrades we've been noticing the same frame is captured twice, once including the vlan tag and once with the tag stripped (actually sometimes we've noticed several repeated frames) Does anyone happen to know how we can eliminate this a. either during capture (via linux tcpdump) or b. during display (take out the duplicate frames)?
I'd suggest a capture filter of "vlan" or "not vlan" (depending on which you prefer to see): drop the duplicate packets sooner rather than dealing with them later.
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Current thread:
- duplicate frames captured by tcpdump Manolis Katsidoniotis (Jan 14)
- Re: duplicate frames captured by tcpdump Abhik Sarkar (Jan 15)
- Re: duplicate frames captured by tcpdump Jeff Morriss (Jan 15)
- <Possible follow-ups>
- Re: duplicate frames captured by tcpdump noah davids (Jan 15)