tcpdump mailing list archives

Packet Loss Count


From: Sanjay Sundaresan <sunda1 () usc edu>
Date: Fri, 22 Jul 2011 19:30:40 -0700

Hi

After Running TCPDUMP say the following amount is obtained

9298933 packets captured
9298932 packets received by filter
2871368 packets dropped by kernel

Can we assume the percentage of packets dropped during capture on that
particular interface is approximately packets dropped /(packets dropped +
packets captured) * 100% ??

Also, If we are running multiple instance of TCPDUMP on all the interface
then why do each of them report different rate of loss ? Is this becasue not
all of them get equal CPU time ? and Can a single TCPDUMP monitor on
multiple interface ?
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