On Sat, May 25, 2019 at 03:47:37PM -0400, Brian J. Murrell wrote:
> On Sat, 2019-05-25 at 08:52 +0200, Beniamino Galvani via
> networkmanager-list wrote:
> > 
> > Hi, it is not NM sending those RS.
> 
> But they stop as soon as I stop NM.
> 
> > If it were, you would see in the
> > journal messages like:
> > 
> >   ndisc[0x55a43c15e0e0,"ens9"]: router solicitation sent
> 
> I'm not in a position to argue that point, but if the storm can be
> stopped and started by stopping and starting NM, that's pretty strong
> evidence that NM is doing it, wouldn't you agree?

Are you sure you don't have other daemons like systemd-networkd or
something else active which are racing with NM? From logs it is pretty
clear that NM is sending exactly one router solicitation at:

 May 25 15:42:55 server.example.com NetworkManager[10973]: <debug> 
[1558813375.1729] ndisc[0x55a336c550e0,"enp2s0"]: router solicitation sent

However it could be that NM is configuring the kernel in a wrong way.

> > I see from the log that you set a IPv6 token; can you please try
> > without it if it makes any difference?
> 
> But that machine needs to have a predictable, easily remembered
> address, which it does not get without a token.
> 
> In any case, as a debugging step, I did disable it and restart NM and
> the storm did not start up with it.  When I re-enabled the token again
> and restarted NM, the storm started when it started, so it does seem to
> be related to using a token.
> 
> > Also, please attach a log from
> > the beginning of the profile activation.
> 
> There is no "profile activation" because this is a headless server,
> hence the reason for the token.  I'll attach the NM log from the time
> it is started up.  Hopefully that provides what you are looking for.

Yes, it is ok. Note that you can force a new activation of a
connection with:

 nmcli connection up $con_name

where $con_name if the name of the connection obtained through:

 nmcli connection show

In your case the connection name is equal to the device name -
enp2s0. The reactivation is useful to apply changes after modifying a
connection without the need to restart NM or reboot.

Can you also attach the output of

 nmcli connection show enp2s0

?

Beniamino

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