Re: Does the debian kernel sends the gratuitous arp ?

[Jeffrey Walton <noloader@gmail.com>]

On Sun, Oct 8, 2023 at 4:58 AM Geert Stappers <stappers@debian.org> wrote:
>
> 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
> > >
> >
> > 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.

Nope, not that.

I learned a long time ago to answer the question that was asked in the
body of the post.

You're welcome to complain about Systemd all you like. You won't get
any complaints from me. It's not a discussion I will engage in.

Jeff