Le 2019-02-21 16:11, ignat...@cs.uni-bonn.de a écrit :
On Thu, Feb 21, 2019 at 03:58:33PM +0100, triaxx wrote:

tcpdump is like the observer of the Schrödinger's cat, it interfere in
measurement.

If I run tcpdump -i re0 "udp port 67 or 68" -w dhcpcd.pcap when running
service -v dhcpcd restart, it works fine...

If you don't want it to interfere - there's the option "-p"
        ("Don't put the interface into promiscuous mode.")

        -is

This is what I need even if tcpdump -r is now extremely slow.

Thanks \o/

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