Re: Does the debian kernel sends the gratuitous arp ?

From	Geert Stappers <stappers@debian.org>
Newsgroups	linux.debian.user
Subject	Re: Does the debian kernel sends the gratuitous arp ?
Date	2023-10-08 11:00 +0200
Message-ID	<HmxNL-elUg-3@gated-at.bofh.it> (permalink)
References	<HlShz-dWb7-5@gated-at.bofh.it> <Hm0yt-e15d-1@gated-at.bofh.it> <Hmv9f-ekzq-1@gated-at.bofh.it>
Organization	linux.* mail to news gateway

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On Sun, Oct 08, 2023 at 11:21:10AM +0530, Balaji G wrote:
> On Sat, 7 Oct 2023 at 02:50, Jeffrey Walton wrote:
> > On Fri, Oct 6, 2023 at 2:04 PM Balaji G wrote:
> > >
> > > Hi,
> > >
> > > I am using "Debian GNU/Linux 11 (bullseye)" with kernel version 5.16.12.
> > > When i do a link up/down i don't see any Gratuitous ARP being sent.
> > >
> > > # echo 1 > /proc/sys/net/ipv4/conf/eno5np0/arp_notify
> > > # ip link set down dev eno5np0
> > > # ip link set up dev eno5np0
> > >
> > > Captured all the packets via tcpdump & the tcpdump is not showing any
> > > Gratuitous ARP packets.
> > >
> > > But, with the same commands i could see the Gratuitous ARP being sent in
> > > Red hat.9.0 (Plow).
> > >
> > > So, please let me know if this is a specific scenario in Debian 11 ??
> >
> > I think that's now Poettering:
> >
> > https://github.com/systemd/systemd/blob/main/src/libsystemd-network/sd-ipv4acd.c#L302
> >
> > Jeff
> >
> Hi Jeff,
> 
> Do you mean this is a known issue & will be fixed in the future releases ?
> 

Here not Jeff.  What I do understand from Jeff message is
something like:  "I can bitch on systemd, so I do"
Time will tell how much Jeff contributes in solving
the interesting problem of the invisible gratuitous ARP.

Meanwhile lets follow-up
on https://lists.debian.org/debian-user/2023/10/msg00181.html


> Thanks,
> Balaji

You might have an extra copy of this message.
Because I did this time "reply-to-all" insteadof "reply-to-list".

The good thing of "reply-to-list" is that it reveals who reads
mailinglist postings. Yes, I'm trying to tell that you
missed https://lists.debian.org/debian-user/2023/10/msg00181.html
 

Regards
Geert Stappers
-- 
Silence is hard to parse

Thread

Does the debian kernel sends the gratuitous arp ? Balaji G <gbalajieie@gmail.com> - 2023-10-06 14:40 +0200
  Re: Does the debian kernel sends the gratuitous arp ? Geert Stappers <stappers@stappers.nl> - 2023-10-06 21:20 +0200
    Re: Does the debian kernel sends the gratuitous arp ? Geert Stappers <stappers@debian.org> - 2023-10-08 11:20 +0200
      Re: Does the debian kernel sends the gratuitous arp ? debian-user@howorth.org.uk - 2023-10-08 19:30 +0200
  Re: Does the debian kernel sends the gratuitous arp ? Jeffrey Walton <noloader@gmail.com> - 2023-10-06 23:30 +0200
    Re: Does the debian kernel sends the gratuitous arp ? <tomas@tuxteam.de> - 2023-10-07 07:40 +0200
      Re: Does the debian kernel sends the gratuitous arp ? Jeffrey Walton <noloader@gmail.com> - 2023-10-07 18:00 +0200
    Re: Does the debian kernel sends the gratuitous arp ? Balaji G <gbalajieie@gmail.com> - 2023-10-08 08:10 +0200
      Re: Does the debian kernel sends the gratuitous arp ? Geert Stappers <stappers@debian.org> - 2023-10-08 11:00 +0200
        Re: Does the debian kernel sends the gratuitous arp ? Jeffrey Walton <noloader@gmail.com> - 2023-10-08 17:30 +0200
          Re: Does the debian kernel sends the gratuitous arp ? Balaji G <gbalajieie@gmail.com> - 2023-10-09 17:30 +0200
            Re: Does the debian kernel sends the gratuitous arp ? Geert Stappers <stappers@debian.org> - 2023-10-09 22:30 +0200
              Re: Does the debian kernel sends the gratuitous arp ? Geert Stappers <stappers@stappers.nl> - 2023-10-11 22:20 +0200
            Re: Does the debian kernel sends the gratuitous arp ? Balaji G <gbalajieie@gmail.com> - 2023-10-10 06:10 +0200

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