On Wed, Mar 01, 2023 at 02:27:29PM -0800, Han Zhou wrote:
> On Wed, Mar 1, 2023 at 1:50 AM Simon Horman <[email protected]>
> wrote:
> >
> > On Wed, Feb 22, 2023 at 10:35:25PM -0800, Han Zhou wrote:
> >
> > Please add a patch description here.
> 
> Thank Simon for reviewing. For this commit, I think the commit title tells
> everything I wanted to describe, so I omitted it here rather than repeating
> the title.

IMHO something should go here, even if it's just repeating the subject.

> > > Signed-off-by: Han Zhou <[email protected]>
> > > ---
> > >  tests/atlocal.in    |   3 +
> > >  tests/system-ovn.at | 146 ++++++++++++++++++++++++++++++++++++++++++++
> > >  2 files changed, 149 insertions(+)
> >
> > ...
> >
> > > +NS_EXEC([ns_ls1p1], [arping -U -c 1 -w 2 -I ls1p1 -s 10.0.0.88
> 10.0.0.88])
> >
> > I ran into a problem with this when exercising the tests on Ubuntu 22.10.
> >
> > When the arping package is installed then -s expects a MAC address
> > whereas -S expects an ip/hostname. This causes the tests to fail.
> >
> > By changing -s to -S here, and for the other invocation of arping, below,
> I
> > was able to run the tests successfully for both check-kernel and
> > check-system-userspace :)
> >
> > When, instead, arping is supplied by the iputils-arping package,
> > then the new tests work unmodified.
> >
> > I am not sure what, if anything, we wish to do about such compatibility
> > issues. But, FWIIW, I believe noticed a similar problem involving nc not
> so
> > long ago, although I do not recall specifically in which environment or
> > which alternate packages.
> >
> Thanks a lot for testing this. I didn't test this in Ubuntu, but it's
> strange that even from this man page of Ubuntu 22.10, -s is still the right
> one:
> https://manpages.ubuntu.com/manpages/kinetic/man8/arping.8.html
> 
> Regardless, I also see this:
> 
> If this option is absent, source address is:
> 
> ... • In Unsolicited ARP mode (with options *-U *or *-A*) set to* 
> destination*.
> 
> So, hopefully with -U already in the command, we can omit the -s (or -S).
> Do you mind testing the same by removing the -s option and see if it works
> in your environment?

Yes, can do.
Hopefully later today.
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