I have Linux kernel 2.2.19 on one system and OpenBSD 2.8 on another. When I run
tcpdump on both systems for a while and stop, I see "xxxxx packets dropped" on
OpenBSD and not so on Linux. I don't know which version of libpcap is being
used on either system. (Please let me know if there is a way to find out).

On Linux, during the kernel compile I did select 'IP Accounting' option which
should give me accurate # of packets getting dropped. Then again, I am being
told that the IP accounting info is largely dependent on the libpcap.

How do I get accurate count of the packets dropped? I do not want any packets
to be dropped by the kernel, and want all the packets to be processed by the
filters. How do I increase the buffer to avoid packets from being dropped?

Thanks for any info.
-- 

Subba Rao
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http://members.home.net/subba9/

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